Home
Class 12
PHYSICS
A long solenoid has 20 turns/cm. The cur...

A long solenoid has 20 turns/cm. The current necessary to produce a magnetic field of 20 millitesla inside the solenoid is approximately.

A

1A

B

2A

C

4A

D

8A

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Moving charges can produce a magnetic fieldin the surrounding space A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8xm. If the current carried is 8 A. Calculate the magnitude of field B in side the solenoid near its centre

A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

A long solenoid with 15 turns per cm has a small loop of area 2.0 cm^2 placed inside the solenoid normal to its axis. If the current carried by the solenoid changes steadily from 2.0 A to 4.0 A in 0.1 s, what Is the Induced emf In the loop while the current is changing?