Current Electricity

At steady state the charge on the capacitor, as shown in the circuit below, is . [figure]

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below.

1. Statement-I is false but Statement-II is true
2. Statement-I is true but Statement-II is false
3. Both Statement-I and Statement-II are false
4. Both Statement-I and Statement-II are true

Which of the following resistivity ( ) v/s temperature ( T ) curves is most suitable to be used in wire bound standard resistors?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance Rp=1 as shown in the figure. An external resistance of Re=2 is connected via the sliding contact. The electric current in the circuit is : [figure]

1. 1.35 A
2. 0.9 A
3. 1.0 A
4. 0.3 A

The net current flowing in the given circuit is A. [figure]

The equivalent resistance between A and B is : [figure]

1. 18
2. 27
3. 19
4. 25

The current flowing through the 1 resistor is n10 A. The value of n is . [figure]

The effective resistance between A and B, if resistance of each resistor is R, will be : [figure]

1. 8R3
2. 4R3
3. 23R
4. 5R3

To determine the resistance (R) of a wire, a circuit is designed below. The V-I characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in figure. The value of R is . [figure]

At room temperature (27 ), the resistance of a heating element is 50 . The temperature coefficient of the material is 2.4 10-4 C-1. The temperature of the element, when its resistance is 62 , is .