In the circuit shown below, the cell has an e.m.f. of 10 V and internal resistance of 1 ohm. The other resistances are shown in the figure. The potential difference VA−VB is :
1. 6 V
2. 4 V
3. 2 V
4. –2 V
A wire of resistance R is cut into ‘n’ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be :
1. nR
2. Rn
3. nR
4. Rn2
The current in the given circuit is
1. 8.31 A
2. 6.82 A
3. 4.92 A
4. 2 A
What is the current (i) in the circuit as shown in figure
1. 2 A
2. 1.2 A
3. 1 A
4. 0.5 A
n equal resistors are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance
1. n
2. 1n2
3. n2
4. 1n
In the figure, current through the 3 Ω resistor is 0.8 ampere, then potential drop through 4 Ω resistor is
1. 9.6 V
2. 2.6 V
3. 4.8 V
4. 1.2 V
What is the equivalent resistance between A and B in the figure below if R = 3 Ω
1. 9 Ω
2. 12 Ω
3. 15 Ω
4. None of these
What is the equivalent resistance between A and B
1. 23R
2. 32R
3. R2
4. 2 R
What is the equivalent resistance of the circuit?
1. 6 Ω
2. 7 Ω
3. 8 Ω
4. 9 Ω