In the given figure, when key K is opened, the reading of the ammeter A will be
1. 50 A
2. 2 A
3. 0.5 A
4.
If a resistance R2 is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of R2 will be
1.
2.
3.
4.
A battery of emf \(10\) V is connected to resistance as shown in the figure below. The potential difference \(V_{A} - V_{B}\)
between the points \(A\) and \(B\) is:
1. \(-2\) V
2. \(2\) V
3. \(5\) V
4. \(\frac{20}{11}~\text{V}\)
A student has 10 resistors of resistance ‘r’. The minimum resistance made by him from given resistors is :
1. 10 r
2.
3.
4.
Two wires of same metal have the same length but their cross-sections are in the ratio 3 : 1. They are joined in series. The resistance of the thicker wire is 10 Ω. The total resistance of the combination will be
1. 40 Ω
2.
3.
4. 100 Ω
The equivalent resistance of the following infinite network of resistances is
1. Less than 4 Ω
2. 4 Ω
3. More than 4 Ω but less than 12 Ω
4. 12 Ω
In the figure given below, the current passing through 6 Ω resistor is
1. 0.40 ampere
2. 0.48 ampere
3. 0.72 ampere
4. 0.80 ampere
The equivalent resistance between points A and B of an infinite network of resistances each of 1 Ω connected as shown, is
1. Infinite
2. 2 Ω
3.
4. Zero
In the circuit shown, the point ‘B’ is earthed. The potential at the point ‘A’ is :
1. 14 V
2. 24 V
3. 26 V
4. 50 V
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 is :
1. 6 V
2. 4 V
3. 2 V
4. –2 V