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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.
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
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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