Six equal resistance, each 4 , make the arms of the given figure. The effective resistance between any two corners is
1. 10
2. (2/3)
3. 4
4. 2
What is the potential difference between P and Q in the circuit shown in fig
1. 15 V
2. 10 V
3. 5 V
4. 2.5 V
In fig, the current in 3 resistance is
1. 1 A
2.
3.
4.
Seven identical cells each of emf E and internal resistance r are connected as shown. The potential difference between A and B is
1. 7 E
2. E
3. 6 E
4. zero
The given network in fig. is part of a larger circuit. The current through resistors are shown. The potential difference is
1. -2 V
2. 19 V
3. 22 V
4. -19 V
The current drawn by the battery in the situation shown in fig
1. 2.5 A
2. 5 A
3. 7.5 A
4. 1 A
In fig. the current passing through 3 resistor is
1.
2. 3 A
3. 2 A
4.
The length of a potentiometer wire is l. A cell of emf E is balanced at a length l/3 from the positive end of the wire. If the length of the wire is increased by l/2, (without changing the potential difference across the wire), at what distance will the same cell give a balance point ?
1. 2 l/3
2. l/2
3. l/6
4. 4 l/3
There is an infinite wire grid with triangular units. The resistacne of each wire between neighbouring joints is equal to r. The equivalent resistance of the grid between the points A and B is
1. r/2
2. r/3
3. 2 r/3
4. r/6
In the circuit shown in fig. , what is the current in the 2 resistor ?
1. 2 A
2. 4 A
3. 6 A
4. 8 A