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WHAT IS THE DIFFERENCE BETWEEN AC AND DC CURENT ?
notes of magnetic effects of electric current
Explain why, a freely suspended magnet always points in the North-South direction.
About 3-4 mark answer please!
WHY DON'T TWO MAGNETIC FIELD LINES INTERSECT EACH OTHER?
explain different ways to induce current in a coil.
Explain what is short circuiting and overloading in an electric supply.
Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?
give reason why (i)tungsten is used for making filament of electric lamps; (ii) the elements of heating electrical appliaces are made up of an alloy rather than pure metal
Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?
1.A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What
explain constuction and principle of a.c. generator with diagram?
What is Difference between Short Circuit & overloading?
Please answer it with about 4 points.
positive terminal of battery is north pole or south pole
A circuit has a fuse of 5A.find the maximum number of 100W 220V lamp that can be used in a circuit.
Magnetic field is scalar or vector quantity ? Give reasons for your answer.
state and explain properly maxwell right hand thumb rule
List the factors on which the magnetic field produced by a current carrying straight conductor depends ? State the rule which gives the direction of its magnetic field. Draw the pattern of magnetic field lines due to a straight current carrying conductor.
(a) Describe an activity to demonstrate the pattern of magnetic field lines around a straight conductor carrying current. (b) State the rule to find the direction of magnetic field associated with a current carrying conductor. (c) What is the shape of a current carrying conductor whose magnetic field pattern resembles that of a bar-magnet ?
difference between a bar magnet and an electro magnet
What is the function of brushes in electric generator?
List two methods of producing magnetic fields.
What is meant by overloading of an electrical circuit ? Explain two possible causes due to which overloading may occur in household circuit ? Explain one precaution that should be taken to avoid the overloading of domestic electric circuit.
What is role of split ring in an electric motor ?
1. Write down the preparation, 2 properties and 2 uses for the following :-(a) Washing soda.(b) Baking soda.(c) Bleaching powder.(d) Plaster of paris.2. Why does a transformer not work in DC?
is there a magnetic field produced around a thin beam of moving 1)alpha particles , 2)neutrons? justify your answer
Q2. The magnetic field lines in a given region is uniform. Draw a diagram to represent them. Write two ways to induce current in a coil?
electric appliances like electric-press ,toaster ,fans etc.are connected to electric mains through three-pin plug.Why?
i have not understood fleming's Left Hand Rule and Right hand thumb rule please explain
FORCE ON A CURRENT CARRYING CONDUCTOR PLACED IN MAGNETIC FIELD
'the direction of force acting on a current carrying conductor is perpendicular to the direction of current and magnetic field's maximum force is exerted only when it is placed perpendicular to the magnetic field " '
can anyone please explain this statement relating to the under lined portion. i WILL GIVE A THUMB UP IF IT IS CLEAR.PLEASE?
kindly suggest any science working model project for physics or chemistry class X...thanx
Which of the following property of a proton can change while it moves freely in a magnetic field? (Mass, speed, velocity, momentum) Please answer soon.........
Explain why a copper wire can not be used as a fuse wire?
what is the disadvantage of short circuit
How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.
what is the difference between tesla and oersted???
13. Draw the pattern of magnetic field lines of a current carrying circular loop. What does the
what is the difference between A.C. generator and D.C. generator as well as A.C motor A.C motor????
what is the principle of the electric motor?
a coil is insulated copper wire is connected to a galvanometer. what would happen if a bar magnet is : i) pushed into coil ii) withdrawn from inside the coil iii) held stationary inside the coli?
Difference between fleming's left hand rule and right hand rule?where to apply left hand rule and where to apply right hand rule?
Why does a rectangular coil carrying current rotate in a magnetic field?
state 2 ways by which the strength of an electromagnet can be increased.what type of core is used to make an electromagnet?state 3 differences btwn the electromagnet and permanent,
Why does a current carrying conductor kept in a magnetic field experience force? On what factor does the direction of this force depend? Name and state the rule used determination of direction of current
WHAT IS THE PRINCIPLE OF THE ELECTRIC GENERATOR ???
how fleming's right hand rule is used to find the induced current in AC Generator ?
how to make a science model using waste materials available at home
what is the maxwells cork screw rule
consider a circular loop of wire lying in the plane of the table let the current pass through the loop clockwise apply the right hand rule to find out the direction of magnetic field inside and outside the loop?
Please Someone Answer Fast...
Explain the different ways of inducing current in a coil.
A current through a horizontal power line flows in east to west direction.What is the direction of magnetic field line at a point directly below it?How to do this.I cant understand the text book solution plsss someone help!!
why v use Flaming's left hand and right hand rules . why not the same say left or right hand rule can't be used when three terms i.e. direction of field, current and force are same
what is the function of slip rings in ac generator?
what is meant by the vicinity of the conductor?
An AC generator can be converted into a DCgenerator by replacing(1) Its armature with a coil(2) Its concave magnets(3) Its slip rings with split rings(4) Two brushes with four brushes
What is a fuse? How does it function? Explain the terms: Short Circuiting, Overloading and
Van Allen belts.
compare the magnetic field pattern due to a current carrying solenoid with that of a bar magnet
state flemings left hand rule
what is ampere's swimming rule??
Explain the function of fuse in a domestic circuit?
What is clock face rule?
why does a current carrying conductor kept in magnetic field experience force ?
why is a fuse always plased in a live wire?
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Syllabus
WHAT IS THE DIFFERENCE BETWEEN AC AND DC CURENT ?
The maximum and minimum magnitudes of the resultant of two forces are 35 N and 5 N respectively.
Find the magnitude of resultant force when act orthogonally to each other.
notes of magnetic effects of electric current
Give 5 pts in tabular form only ?
Explain why, a freely suspended magnet always points in the North-South direction.
About 3-4 mark answer please!
WHY DON'T TWO MAGNETIC FIELD LINES INTERSECT EACH OTHER?
(a) Find the times at which the angular velocity of the disc is zero.
(b) Its angular acceleration at these times.
explain different ways to induce current in a coil.
A) tends to get shorter
B) tends to get longer
C) tends to rotate about its axis
D) Produces zero magnetic field at its center
Explain what is short circuiting and overloading in an electric supply.
Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?
(a) 70
(b) 80
(c) 140
(d) 160
give reason why (i)tungsten is used for making filament of electric lamps; (ii) the elements of heating electrical appliaces are made up of an alloy rather than pure metal
Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?
1.A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What
current will flow in the resistance?2.. A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference isthere between its ends?3.. A current of 5 amperes flows through a wire whose ends are at a potential difference of 3volts. Calculate the resistance of the wire.4. The resistance of an electric lamp filament is 230 ohms. The lamp is switched on when theline voltage is 115 volts. What is the current in the lamp circuit?5. What is the potential difference between the ends of a conductor of 16 ohm resistance,when a current of 1.5 A flows through it?6. Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts toanother point at 230 volts.7. What is the potential difference between the terminals of a battery if 250 joules of work isrequired to transfer 20 coulombs of charge from one terminal of the battery to the other?8. How much work is done in moving a charge of 2 C across two points having a potentialdifference of 12 V?9.A wire of resistance R is cut into five equal pieces. These five pieces of wire are thenconnected in parallel. If the resultant resistance of this combination be R then the ratio ofresultant to the original will be?10. A copper wire has a diameter of 0.5 mm and resistivity of 1.6 x 10 m.1. What will be the length of this wire to make its resistance 10 2ohm?2. How much does the resistance change if the diameter is doubled?11. An electric heater which is connected to a 220 V supply line has two resistance coils A andB of 24 resistances each. These coils can be used separately (one at a time), in series or inparallel. Calculate the current drawn when1. Only one coil A is used.2. Coils A and B are used in series.3. Coils A and B are used in parallel.12. If the length of a wire is doubled by taking more of wire, what happens to its resistance?13. How does the resistance of a wire change when1. Its length is tripled?2. Its diameter is tripled?3. Its material is changed to one whose resistivity is three times?14. How much energy is given to each coulomb of charge passing through a 6 V battery?15.A copper wire has a diameter of 0.5 mm and resistivity of 1.6 x 10 m.1. What will be the length of this wire to make its resistance 10 2ohm?2. How much does the resistance change if the diameter is doubled?16. The current passing through a room heater has been halved. What will happen to the heatproduced by it?17.. An electric iron of resistance 20 ohm draws a current of 5 amperes. Calculate the heatproduced in 30 seconds.18. An electric heater of resistance 8 ohm takes a current of 15 A from the mains supply line.Calculate the rate at which heat is developed in the heater.19. A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply.Find the heat in joules produced by this combination in half a minute.20.State the conclusions that can be drawn from the observation that a current carrying wiredeflects a magnetic needle placed near it21 Suggest one way of discriminating a wire carrying current from a wire carrying no current?22. Name the physical quantities which are indicated by the direction of thumb and fore finger inFlemings right hand rule.23 What is the purpose of the soft iron core used in making an electromagnet? How it is differentfrom permanent magnet?24.With the help of a neat diagram describe how you can generate induced current in the circuit?25.What is an electro magnet ? Draw a circuit diagram to show how a soft iron piece can betransformed into an electro magnet?explain constuction and principle of a.c. generator with diagram?
1) What will be the speed of the test charge after 1 second?
2) Which of the foolowing characterstics of the test charge do not change with the time? Assume "theta is not equal to 0.
a. Momentum
b. Acceleration
c. Kinetic Energy
d. None of the above
3) If "theta" = 0, which of the following change with time?
a. Momentum
b. Acceleration
c. Kinetic Energy
d. None of the above
4) If "theta" is neither 0 nor 90, the path of the test charge is ______________.
5) If m be the mass of the charged particle, which enters with the velocity "v" normal to the magnetic field "B", it will revolve with angular speed given by:-
a. qBm
b. (qm)/B
c. (qB)/m
d. B/(qm)
What is Difference between Short Circuit & overloading?
Please answer it with about 4 points.
positive terminal of battery is north pole or south pole
A circuit has a fuse of 5A.find the maximum number of 100W 220V lamp that can be used in a circuit.
Magnetic field is scalar or vector quantity ? Give reasons for your answer.
state and explain properly maxwell right hand thumb rule
List the factors on which the magnetic field produced by a current carrying straight conductor depends ? State the rule which gives the direction of its magnetic field. Draw the pattern of magnetic field lines due to a straight current carrying conductor.
(a) Describe an activity to demonstrate the pattern of magnetic field lines around a straight conductor carrying current. (b) State the rule to find the direction of magnetic field associated with a current carrying conductor. (c) What is the shape of a current carrying conductor whose magnetic field pattern resembles that of a bar-magnet ?
difference between a bar magnet and an electro magnet
What is the function of brushes in electric generator?
List two methods of producing magnetic fields.
What is meant by overloading of an electrical circuit ? Explain two possible causes due to which overloading may occur in household circuit ? Explain one precaution that should be taken to avoid the overloading of domestic electric circuit.
What is role of split ring in an electric motor ?
a) 4
b) 5
c) 6
d) 7
1. Write down the preparation, 2 properties and 2 uses for the following :-
(a) Washing soda.
(b) Baking soda.
(c) Bleaching powder.
(d) Plaster of paris.
2. Why does a transformer not work in DC?
A}what will be the length of this wire to make its resistance 50 ohm?
b}how much does the resistance change if the diameter is tripled?
is there a magnetic field produced around a thin beam of moving 1)alpha particles , 2)neutrons? justify your answer
Q2. The magnetic field lines in a given region is uniform. Draw a diagram to represent them. Write two ways to induce current in a coil?
electric appliances like electric-press ,toaster ,fans etc.are connected to electric mains through three-pin plug.Why?
i have not understood fleming's Left Hand Rule and Right hand thumb rule please explain
FORCE ON A CURRENT CARRYING CONDUCTOR PLACED IN MAGNETIC FIELD
'the direction of force acting on a current carrying conductor is perpendicular to the direction of current and magnetic field's maximum force is exerted only when it is placed perpendicular to the magnetic field " '
can anyone please explain this statement relating to the under lined portion. i WILL GIVE A THUMB UP IF IT IS CLEAR.PLEASE?
kindly suggest any science working model project for physics or chemistry class X...thanx
[Hint: Find acc. then m = F/a & p = mv]
Which of the following property of a proton can change while it moves freely in a magnetic field? (Mass, speed, velocity, momentum) Please answer soon.........
Explain why a copper wire can not be used as a fuse wire?
what is the disadvantage of short circuit
How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.
what is the difference between tesla and oersted???
13. Draw the pattern of magnetic field lines of a current carrying circular loop. What does the
pattern of field lines inside the circular loop indicate? On what factor does the strength of themagnetic field in a circular coil depends?what is the difference between A.C. generator and D.C. generator as well as A.C motor A.C motor????
what is the principle of the electric motor?
a coil is insulated copper wire is connected to a galvanometer. what would happen if a bar magnet is : i) pushed into coil ii) withdrawn from inside the coil iii) held stationary inside the coli?
Difference between fleming's left hand rule and right hand rule?where to apply left hand rule and where to apply right hand rule?
Why does a rectangular coil carrying current rotate in a magnetic field?
state 2 ways by which the strength of an electromagnet can be increased.what type of core is used to make an electromagnet?state 3 differences btwn the electromagnet and permanent,
Why does a current carrying conductor kept in a magnetic field experience force? On what factor does the direction of this force depend? Name and state the rule used determination of direction of current
16 (a) A current I passes through a circular loop C and A solenoid AB is shown below:
What is polarity of :
(i) The face of the loop you are looking at ?
(ii) The end B of the solenoid?
WHAT IS THE PRINCIPLE OF THE ELECTRIC GENERATOR ???
how fleming's right hand rule is used to find the induced current in AC Generator ?
how to make a science model using waste materials available at home
what is the maxwells cork screw rule
consider a circular loop of wire lying in the plane of the table let the current pass through the loop clockwise apply the right hand rule to find out the direction of magnetic field inside and outside the loop?
Please Someone Answer Fast...
Explain the different ways of inducing current in a coil.
A current through a horizontal power line flows in east to west direction.What is the direction of magnetic field line at a point directly below it?How to do this.I cant understand the text book solution plsss someone help!!
a. east
b. north
c. down
d. west
please please give the explanation also
why v use Flaming's left hand and right hand rules . why not the same say left or right hand rule can't be used when three terms i.e. direction of field, current and force are same
what is the function of slip rings in ac generator?
what is meant by the vicinity of the conductor?
An AC generator can be converted into a DC
generator by replacing
(1) Its armature with a coil
(2) Its concave magnets
(3) Its slip rings with split rings
(4) Two brushes with four brushes
What is a fuse? How does it function? Explain the terms: Short Circuiting, Overloading and
Van Allen belts.
compare the magnetic field pattern due to a current carrying solenoid with that of a bar magnet
state flemings left hand rule
what is ampere's swimming rule??
Explain the function of fuse in a domestic circuit?
What is clock face rule?
why does a current carrying conductor kept in magnetic field experience force ?
why is a fuse always plased in a live wire?