A power line lies along the east-west direction and carries a current of 10 ampere . The force per metre due to the earth's magnetic field of 10^−4 tesla is

Question:

A power line lies along the east-west direction and carries a current of 10 ampere . The force per metre due to the earth’s magnetic field of 10^-4T is

Options :

(a) 10^-5N/m
(b) 10^-5N/m
(c) 10^-3N/m
(d) 10^-2N/m

Answer :

Answer Steps :

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

If a body is executing simple harmonic motion then

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