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 ___.
- 45o
- 60o
- 90o
- 180o
Hint:
180°
The correct answer is: 180o
A current carrying wire feels a force in the presence of an external magneticfield. It is found to be F = BILsinø, where,
L is the length of the wire; I is the current; ø is the angle between the current deduction and the magnetic field.
As the value of sin 180ﾟ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ﾟ.
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