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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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What happens to the kinetic energy of a body when: a) the mass of the body is doubled at constant velocity? b) the velocity of t
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What happens to the energy of a wave as it moves away from its source?
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6 0
2 years ago
Positive electric charge Q is distributed uniformly throughout the volume of an insulating sphere with radius R.From the express
AlladinOne [14]

Answer:

Vb = k Q / r        r <R

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Explanation:

The electic potential is defined by

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Let's substitute every equation they give us and we find out

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We evaluate with it Va = 0 for r = infinity

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We perform the calculation of the power with the expression of the electric field that they give us

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