SOMEONE PLEASE ANSWER, CORRECT ANSWER WITH EXPLANATION WILL BE MARKED BRAINLIEST!! A solenoid of length l is supplied with a constant current through it. What happens to the length of the solenoid? A) It increases B) It decreases C) It remains the same D) Can't say
Answers
Answer:
Given that,
A charge particle is projected along the axis of the solenoid with a speed v0.
We know that,
The force acting on a charge particle of charge q moving with a velocity v in a magnetic field B.
By the Lorentz force
F=q(v×B)
In a solenoid,
The magnetic field is along the axis of the solenoid and the charge particle projected with velocity v is also along the axis of the solenoid that means v and B are parallel and angle between these vectors is zero.
The magnitude of the force on the charge particle is
F=q(∣v∣×∣B∣)sin0
0
F=0
So, the force is zero.
Explanation:
There is no change in the length of the solenoid, if the current is flowing through it...
CONCEPT : The solenoid length and the area of cross-section does not change with respect to the current flowing in it... For any copper wire to be called as a solenoid it's length has to be greater than its diameter...