Question:

In the circuit, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of resistor R will be

Updated On: Jul 21, 2023

  • 100Ω

  • 200Ω

  • 1000Ω

  • 500Ω

Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is A

Solution and Explanation

Correct option is A)

Applying Kirchoff's law
for loop BCDFAEB: 500i = 12-2 ⇒ i = 10/500 = 1/50
when galvanometer shows zero deflection then no current flow through it. 

now for loop BCDEB: 500i+Ri=2⇒ i = \(\frac{12}{R+500}\)

or 1/50 = 12/(R+500)

or R+500 = 600 = R=100Ω

Was this answer helpful?
0
0

Top Questions on Current electricity

View More Questions

Concepts Used:

Current Electricity

Current electricity is defined as the flow of electrons from one section of the circuit to another.

Types of Current Electricity

There are two types of current electricity as follows:

Direct Current

The current electricity whose direction remains the same is known as direct current. Direct current is defined by the constant flow of electrons from a region of high electron density to a region of low electron density. DC is used in many household appliances and applications that involve a battery.

Alternating Current

The current electricity that is bidirectional and keeps changing the direction of the charge flow is known as alternating current. The bi-directionality is caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back-and-forth motion for the current. The electrical outlets at our homes and industries are supplied with alternating current.