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Rajay Rajay Chakrasingh
Subject: Physics
, asked on 14/5/18
Q. What is the equivalent resistance of the circuit and the amount of current flowing through the circuit?
Answer
4
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 14/5/18
Solve this:
Q. The equivalent resistance of the network shown in the figure between the points A and B is
(A) 4r
(B) 4r/3
(C) 3r
(D) 3r/4
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 14/5/18
If I say that one wire has 2 times the thickness of another wire then does it mean that the RADIUS of the first wire is 2 times that of the second wire or the AREA of the first wire is 2 times that of the second wire ?
Answer
2
Omm Prasad
Subject: Physics
, asked on 7/5/18
Please do not provide any link.
Q 6.
Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 5/5/18
Plz note the question in the picture!!
Q. While calculating the equivalent resistance between A & B, why will
${R}_{1}$
not come into play?
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 4/5/18
Q. What is the equivalent resistance between AB?
Answer
1
Omm Prasad
Subject: Physics
, asked on 27/4/18
Please solve the 15 th question.
Please do not provide any link.
Q.15. A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5
$\Omega $
. A steady current of 0.5 A flows through the circuit. Calculate :
(i) the total energy supplied by the battery in 10 minutes,
(ii) the resistance of the bulb, and
(iii) the energy dissipated in the bulb in 10 minutes.
Ans. (i) 1200 J (ii) 5.5
$\Omega $
(iii) 825 J
Answer
2
Omm Prasad
Subject: Physics
, asked on 27/4/18
Please solve the 13 problem.
Please do not provide any link
Q.13. An electric bulb is rated '250 W, 230 V'. Calculate:
(i) the energy consumed in one hour, and
(ii) the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.
Ans. (i) 9
$\times {10}^{5}$
J (ii) 4 h
Answer
1
Omm Prasad
Subject: Physics
, asked on 11/4/18
Please solve the 25(ii) number.
Please do not provide any link.
Q.25. A particular resistance wire has a resistance of 3.0 ohm per metre. Find :
(a) The total resistance of three lengths of this wire each 1.5 m long, joined in parallel.
(b) The potential difference of the battery which gives a current of 2.0 A in each of the 1.5 m length when connected in parallel to the battery (assume that the resistance of battery is negligible).
Answer
1
Omm Prasad
Subject: Physics
, asked on 11/4/18
Please solve the 28 number.
Please do not provide any link.
Q.28. The circuit diagram in Fig. 8.53 shows three resistors 2
$\Omega $
, 4
$\Omega $
, and R
$\Omega $
connected to a battery of e.m.f. 2 V and internal resistance 3
$\Omega $
. If main current of 0.25 A flows through the circuit, find :
(a) the p.d. across the 4
$\Omega $
resistor,
(b) the p.d. across the internal resistance of the cell,
(c) the p.d. across the R
$\Omega $
or 2
$\Omega $
resistor, and
(d) the value of R.
Ans. (a) 1 V (b) 0.75 V (c) 0.25 V (d) 2
$\Omega $
Answer
1
Omm Prasad
Subject: Physics
, asked on 11/4/18
Please solve the 18 th problem.
Please do not provide any link.
Q.18. In the network shown in Fig. 8.49, calculate the equivalent resistance between the points (a) A and B, and (b) A and C.
Ans. (a) 1.5
$\Omega $
(b) 2
$\Omega $
Answer
1
Omm Prasad
Subject: Physics
, asked on 11/4/18
Please solve the 22 number.
Please do not provide any link.
Q.22. Two resistors of resistance 4
$\Omega $
and 6
$\Omega $
are connected in parallel to a cell to draw current 0.5 A from the cell.
(a) Draw a labelled diagram of the arrangement.
(b) Calculate the current in each resistor.
Ans. 0.3 A in 4
$\Omega $
and 0.2 A in 6
$\Omega $
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 7/4/18
If we take two objects of same mass and of the same material, can we say that their volumes are equal?
Answer
5
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 6/4/18
Resistance of a rod A is 30 Ohm. Another rod of the same mass and same material which has a diameter twice that of rod A is taken what is the resistance of rod B?
I want to know in the solution why is it taken that the density of both roads are same?
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 6/4/18
Please help
4.
If a charged body attracts another body, the charge on the other body
(a) must be negative
(b) must be positive
(c) must be zero
(d) may be negative or positive or zero
Answer
2
1
2
3
4
5
Next
What are you looking for?

Q. The equivalent resistance of the network shown in the figure between the points A and B is

(A) 4r

(B) 4r/3

(C) 3r

(D) 3r/4

Q 6. Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.

Q. While calculating the equivalent resistance between A & B, why will ${R}_{1}$ not come into play?

Please do not provide any link.

Q.15. A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 $\Omega $. A steady current of 0.5 A flows through the circuit. Calculate :

(i) the total energy supplied by the battery in 10 minutes,

(ii) the resistance of the bulb, and

(iii) the energy dissipated in the bulb in 10 minutes.

Ans. (i) 1200 J (ii) 5.5 $\Omega $ (iii) 825 J

Please do not provide any link

Q.13. An electric bulb is rated '250 W, 230 V'. Calculate:

(i) the energy consumed in one hour, and

(ii) the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

Ans. (i) 9$\times {10}^{5}$ J (ii) 4 h

Please do not provide any link.

Q.25. A particular resistance wire has a resistance of 3.0 ohm per metre. Find :

(a) The total resistance of three lengths of this wire each 1.5 m long, joined in parallel.

(b) The potential difference of the battery which gives a current of 2.0 A in each of the 1.5 m length when connected in parallel to the battery (assume that the resistance of battery is negligible).

Please do not provide any link.

Q.28. The circuit diagram in Fig. 8.53 shows three resistors 2 $\Omega $, 4 $\Omega $, and R $\Omega $ connected to a battery of e.m.f. 2 V and internal resistance 3 $\Omega $. If main current of 0.25 A flows through the circuit, find :

(a) the p.d. across the 4 $\Omega $ resistor,

(b) the p.d. across the internal resistance of the cell,

(c) the p.d. across the R $\Omega $ or 2 $\Omega $ resistor, and

(d) the value of R.

Ans. (a) 1 V (b) 0.75 V (c) 0.25 V (d) 2 $\Omega $

Please do not provide any link.

Q.18. In the network shown in Fig. 8.49, calculate the equivalent resistance between the points (a) A and B, and (b) A and C.

Ans. (a) 1.5 $\Omega $ (b) 2 $\Omega $

Please do not provide any link.

Q.22. Two resistors of resistance 4 $\Omega $ and 6 $\Omega $ are connected in parallel to a cell to draw current 0.5 A from the cell.

(a) Draw a labelled diagram of the arrangement.

(b) Calculate the current in each resistor.

Ans. 0.3 A in 4 $\Omega $ and 0.2 A in 6 $\Omega $

I want to know in the solution why is it taken that the density of both roads are same?

4.If a charged body attracts another body, the charge on the other body(a) must be negative

(b) must be positive

(c) must be zero

(d) may be negative or positive or zero