1.

A straight wire of length 2m carries a current of 10A. If this wire is placed in a uniform magnetic field of 0.15T making an angle of 45^(@) with the magnetic field, the applied force on the wire will be

Answer»

1.5N
3N
`3 sqrt2N`
`(3)/(SQRT2)N`

Solution :Force on a current carrying wire in a uniform magnetic field is
`|VEC(F)| = |I (vec(l) xx vec(B))| or F= IlB SIN theta`
Here, I=10A, l=2M, B= 0.15T, `theta= 45^(@)`
`:.` Force, `F= (10A) (2m) (0.15T) sin 45^(@) = (3)/(sqrt2)N`


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