Across a metallic conductor of non-uniform cross-section, a constant potential difference is applied. The quantity which remains constant along the conductor is :

1. current density
2. current
3. drift velocity
4. electric field

The power dissipated across the 8Ω resistor in the circuit shown here is 2 W. The power dissipated in watt units across the 3 Ω resistor is : 

1. 2.0

2. 1.0

3. 0.5

4. 3.0

Consider the following two statements :
(A) Kirchhoff’s junction law follows from the conservation of charge. 
(B) Kirchhoff’s loop law follows from the conservation of energy. 
Which of the following is correct?

1. Both (A) and (B) are wrong

2. (A) is correct but (B) is wrong

3. (A) is wrong and (B) is correct

4. Both (A) and (B) are correct.

The total power dissipated in watts in the circuit shown here is: 

1. 16

2. 40

3. 54

4. 4

The reading of an ideal voltmeter in the circuit shown is

(1) 0.6V

(2) 0 V

(3) 0.5 V

(4) 0.4 V

1.  6.3 min

2.  8.4 min

3.  12.6 min

4.  4.2 min

The metre bridge shown is in balanced position with $\frac{P}{Q}=\frac{l_1}{l_2}$ . If we now interchange the position of galvanometer and cell, will the bridge work? If yes, what will be balanced condition?

(1) yes, $\frac{P}{Q}=\frac{l_1- l_2}{l_1+ l_2}$

(2) no, no null point

(3) yes, $\frac{P}{Q}=\frac{l_2}{l_1}$

(4) yes, $\frac{P}{Q}=\frac{l_1}{l_2}$