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Alona [7]
3 years ago
10

An electromagnet is strong enough to lift 200 kg of mass. If you double the number of turns of wire around the core and triple t

he current, how much will it be able to lift?
Physics
1 answer:
VLD [36.1K]3 years ago
4 0

Answer:1200 kg

Explanation:

Given

Electromagnet can lift a mass of  200\ kg

Magnetic force necessary to hold mass is proportional to Magnetic field

and magnetic field (B) is proportional to NIA

where N=no of turns

I=current in the magnet

A=area of cross-section

When we double the no of turns and triple the current then

N becomes 2 N

I becomes 3 I

therefore magnetic field becomes 6 times

Thus magnetic force becomes 6 times and we can say that electromagnet can hold the 6 times of given weight

i.e. 6\times 200=1200\ kg

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