Question

What is the effective resistance between A and B in the above circuit?

a. 4Ω     b. 2Ω    c. 1Ω    d. 2.4Ω

What is the total current in the circuit?

a. 0A    b.  2 A    c. 1 A    d. 0.5 A

Current through 8 ohm resistor is:

a. 0 A     b.  2 A     c.  1 A     d.  0.5 A

What will be the drop across 3 Ohm resistor?

a. 1V     b. 2V     c. 3V     d. 0V

Answer 1

Effective resistance= 4 ohm

Total current = 2 A

Based on wheatstone bridge principle :

8 ohm acts at galvanometer's position hence no current passes thru it!

Current through 8 ohm resistor is zero

Voltage drop across 3 ohm resistor is 3 V