In the circuit, the potential difference across PQ will be nearest to 

1. 9.6 V

2. 6.6 V

3. 4.8 V

4. 3.2 V

Three resistors are connected to form the sides of a triangle ABC, the resistance of the sides AB, BC and CA are 40 ohms, 60 ohms and 100 ohms respectively. The effective resistance between the points A and B in ohms will be 

1. 32

2. 64

3. 50

4. 200

Equivalent resistance across terminals \(A\) and \(B\) will be:

Two wires of the same dimensions but resistivities ρ₁ and ρ₂ are connected in series. The equivalent resistivity of the combination is 

1. ρ₁ + ρ₂

2. $\frac{{\rho }_1+{\rho }_2}{2}$

3. $\sqrt{{\rho }_1{\rho }_2}$

4. $2({\rho }_1+{\rho }_2)$

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be 

1. 1/3 A

2. 1 A

3. 1.5 A

4. 2 A

Find the equivalent resistance between the points a and b 

1. 2 Ω

2. 4 Ω

3. 8 Ω

4. 16 Ω

The potential difference between points A and B is:

         
1. 207 V
2. 407 V
3. 107 V
4. 0

In the circuit shown below, The reading of the voltmeter V is 

1. 12 V

2. 8 V

3. 20 V

4. 16 V

In the circuit shown in the figure, the current flowing in 2 Ω resistance 

1. 1.4 A

2. 1.2 A

3. 0.4 A

4. 1.0 A

In the figure given the value of X resistance will be, when the p.d. between B and D is zero 

1. 4 ohm

2. 6 ohm

3. 8 ohm

4. 9 ohm