Current Electricity

Find the equivalent resistance between two ends of the following circuit [figure]

1. r
2. r6
3. r3
4. r9

A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into a square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is

1. 8/9
2. 9/8
3. 32/27
4. 27/32

The value of current I in the electrical circuit as given below, when potential at A is equal to the potential at B, will be A. [figure]

A wire of resistance 9 is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be ohm.

Refer to the circuit diagram given in the figure. which of the following observations are correct? [figure] Choose the correct answer from the options given below:

1. B, C and E Only
2. A, C and D Only
3. A, B and C Only
4. A, B and D Only

Identify the valid statements relevant to the given circuit at the instant when the key is closed. [figure] Choose the correct answer from the options given below:

1. A, C Only
2. C, D Only
3. A, B, D Only
4. B, C, D Only

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