| Assertion (A): The magnetic field at the ends of a very long current carrying solenoid is half of that at the centre. |
| Reason (R): Magnetic field within a sufficiently long solenoid is uniform. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: B
Solution :
| Option [b] is correct |
| Explanation: Magnetic field inside a solenoid is \[\operatorname{B}={{\mu }_{0}}ni\] |
| Magnetic field at the end of a solenoid is\[1/2{{\mu }_{0}}ni\] |
| So, the assertion is true. |
| Magnetic field within a sufficiently long solenoid is uniform. So reason is also true. But it does not explain the assertion. |
You need to login to perform this action.
You will be redirected in
3 sec
