Question 102: Electromagnetic Induction

Question

A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0 ms
–1
, at right angles to the horizontal component of the earth's magnetic field of 0.3 $$ 	imes $$ 10
–4
Wb/m
2
. The value of the induced emf in wire is :

Accepted Answer

Induied emf = Bv$$\ell $$ sin 45
o
= 0.3 $$ 	imes $$ 10
$$-$$4
$$ 	imes $$ 5 $$ 	imes $$ 10 $$ 	imes $$ sin 45
o
= 1.1 $$ 	imes $$ 10
$$-$$3
V

Answer

0.3 $$ 	imes $$ 10
–3
V

Answer

2.5 $$ 	imes $$ 10
–3
V

Answer

1.5 $$ 	imes $$ 10
–3
V

Answer

1.1 $$ 	imes $$ 10
–3
V

Electromagnetic Induction

A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0 ms –1 , at right angles to the horizontal component of the earth's magnetic field of 0.3 $ \times $ 10 –4 Wb/m 2 . The value of the induced emf in wire is :

Choose the correct answer: