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A meter gauge train is heading nor...

A meter gauge train is heading north with speed 54 km/hr in earth's magnetic field ` 3 xx 10 ^ ( - 4 ) `T. The e.m.f. Induced across the axle joining the wheel is ……….

A

0.45 mV

B

4.5 mV

C

45 mV

D

450 mV

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The correct Answer is:
B
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A wheel with 20 metallic spokes each of length 8.0 m long is rotated with a speed of 120 revolution per minute in a plane normal to the horizontal component of earth magnetic field H at a place. If H=0.4xx10^(-4) T at the place, then induced emf between the axle the rim of the wheel is

A meter gauge train runs northwards with a constant speed of 22 m/s on a horizontal track. If the vertical component of the earth's magnetic field at that place is 3xx10^(-4)T . The emf induced in its axle is

A cycle wheel with 10 spoken, each of the length 0.5m, is moved at a speed of 18 km//hour , in a plane normal to the earth's magnetic induction of 3.6 xx 10^(-5)T . What is the emf induced between the axle and the rim of the cycle wheel?

An aircraft with a wingspan of 40 m flies a speed of 1080 km hr_(1) in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of earth's magnetic fieldis 1.75 xx 10^(-5) T. Find the e.m.f. that develops between the tips of the wings.

GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS- JULY 2016-SECTION -II
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