1. In an electrical circuit, the voltage is measured as V = (200 ± 4) volt and the current is measured as I = (20 ± 0.2) A. The value of the resistance is:

(1).(10 ± 4.2) Ω

(2). (10 ± 0.3) Ω

(3). (10 ± 0.1) Ω

(4). (10 ± 0.8) Ω

2. A uniform metal wire of length l has 10Ω resistance. Now this wire isstretched to a length 2l and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is

(1).10Ω

(2). 5Ω

(3). 40Ω

(4). 20Ω

3. The current passing through the battery in the given circuit is:

(1).1.5 A

(2). 2.0 A

(3). 0.5 A

(4). 2.5 A

4. A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is:

(1).3.0 A

(2). 1.5 A

(3). 2.0 A

(4). 2.5 A

5. A wire of resistance R is cut into 8 equal pieces. From these pieces two equivalent resistances are made by adding four of these together in parallel. Then these two sets are added in series, The net effective resistance of combination is:

(1).\(\displaystyle \frac{R}{8}\)

(2). \(\displaystyle \frac{R}{64}\)

(3). \(\displaystyle \frac{R}{32}\)

(4). \(\displaystyle \frac{R}{16}\)

6. AB is a part of an electrical circuit (see figure). The potential difference \(\text{"V}_\text{A}\,-\,\text{V}_\text{B}\text{"}\), at the instant when current \(i\,=\, 2\text{A}\) and is increasing at a rate of 1 amp/second is:

(1).10 volt

(2). 5 volt

(3). 6 volt

(4). 9 volt