Physics
Grade-10
Easy
Question
The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of the magnetic field is
- 450
- 600
- 900
- 1800
Hint:
180°
The correct answer is: 1800
A current-carrying wire feels a force in the presence of an external magnetic field. It is found to be F=BILsinθ,
where,
L is the length of the wire,
I is the current, and
θ is the angle between the current direction and the magnetic field.
As the value of sin 180 degrees is 0, the force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is 180 degrees.
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