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1.

A wire has resistance 24 $\Omega$. It is bent in the form of a circle. The effective resistance between the two point on the diameter of the circle is 
(1) 6$\Omega$
(2) 4$\Omega$
(3) 3$\Omega$
(4) 12$\Omega$

2.

The drift velocity of the electrons in a current-carrying  metallic conductor is of the order of 
1.  ${10}^4 \mathrm{m}/\mathrm{s}$
2.  ${10}^8 \mathrm{m}/\mathrm{s}$
3.  ${10}^0\mathrm{m}/\mathrm{s}$
4.  ${10}^{-4}\mathrm{m}/\mathrm{s}$

3.

In the circuit shown in the figure, the effective resistance between \(A\) and \(B\) is:
                         
1. \(2~\Omega\)
2. \(4~\Omega\)
3. \(6~\Omega\)
4. \(8~\Omega\)

4.

For the circuit shown in the figure, the value of R must be
                       
1.  3$\mathrm{\Omega }$
2.  4$\mathrm{\Omega }$
3.  5$\mathrm{\Omega }$
4.  6$\mathrm{\Omega }$

5.

$\mathrm{In} \mathrm{the} \mathrm{circuit} \mathrm{shown} \mathrm{in} \mathrm{figure} \mathrm{if} \mathrm{power} \mathrm{dissipated} \mathrm{in} 9\mathrm{\Omega } \mathrm{resistor} \mathrm{is} 144\mathrm{W}, \mathrm{then} \mathrm{potential} \mathrm{difference} \mathrm{across} 3.6\mathrm{\Omega } \mathrm{resistor} \mathrm{will} \mathrm{be}$

1.  36V
2.  18V
3.  9V
4.  Zero

6. A battery has emf \(4\) V and internal resistance \(r\). When this battery is connected to an external resistance of \(2\) ohm, a current of \(1\) ampere flows in the circuit. How much current will flow if the terminals of the battery are connected directly?

1.	\(1\) A	2.	\(2\) A
3.	\(4\) A	4.	Infinite

7.

Three copper wires have their lengths in the ratio 5:3:1 and their masses are in the ratio 1:3:5. Their electrical resistance will be in the ratio of :
1. 5:3:1
2. 1:3:5
3. 125:15:1
4. 1:15:125

8.

The current \(I\) as shown in the circuit will be:

1.	\(10~\text{A}\)	2.	\(\dfrac{20}{3}~\text{A}\)
3.	\(\dfrac{2}{3}~\text{A}\)	4.	\(\dfrac{5}{3}~\text{A}\)

9.

The current through the \(5~\Omega\) resistor is:

1.	\(3.2\) A	2.	\(2.8\) A
3.	\(0.8\) A	4.	\(0.2\) A

10. The current in a wire varies with time according to the relation \(i = (3+2t)~\text{A}\). The amount of charge passing a cross section of the wire in the time interval \(t=0\) to \(t = 4.0~\text{s}\)  would be: (where \(t\) is time in seconds)

1.	\(28\) C	2.	\(30.5\) C
3.	\(8\) C	4.	\(82\) C

11.

In the figure, a carbon resistor has bands of different colours on its body as shown. The value of the resistance is:
                                         
1.  2.2 k$\Omega$
2.  3.3 k$\Omega$
3.  5.6 k$\Omega$
4.  9.1 k$\Omega$

12.

The resistivity of a wire :

1.	Increases with the length of the wire
2.	Decreases with the area of cross-section
3.	Decreases with the length and increases with the cross-section of the wire
4.	None of the above statement is correct

13.

The resistance of a wire is 10 Ω. Its length is increased by 10% by stretching. The new resistance will now be:
(1) 12.1 Ω
(2) 1.2 Ω
(3) 13 Ω
(4) 11 Ω

14.

The potential difference between points A and B of the adjoining figure is

(1) $\frac{2}{3}V$
(2) $\frac{8}{9}V$
(3) $\frac{4}{3}V$
(4) 2 V

15.

The reading of the ammeter as per figure shown is

(1) $\frac{1}{8}A$
(2) $\frac{3}{4}A$
(3) $\frac{1}{2}A$
(4) 2 A

16.

In the figure shown, the total resistance between A and B is

(1) 12 Ω
(2) 4 Ω
(3) 6 Ω
(4) 8 Ω

17.

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. \(\frac{20}{11}~\text{V}\)

18.

What will be the equivalent resistance between the two points A and D 

(1) 10 Ω
(2) 20 Ω
(3) 30 Ω
(4) 40 Ω

19.

The total current supplied to the circuit by the battery is:
      
1. \(1~\text{A}\)
2. \(2~\text{A}\)
3. \(4~\text{A}\)
4. \(6~\text{A}\)

20.

In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to \(3\) volt. The voltage across the resistance \(R_4\) is:
         
1. \(0.4\) V
2. \(0.6\) V
3. \(1.2\) V
4. \(1.5\) V