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4 years ago

In an electric motor, periodically changing the direction of current in the electromagnet can cause the axle to spin because

Physics

2 answers:

loris [4]4 years ago

5 0

Answer:

The magnetic field reverses direction.

Explanation:

Andru [333]4 years ago

4 0

Answer:

D The magnetic field reverses direction.

Explanation:

An electric motor works based on the principle of electromagnetic induction. It is the interaction of electric current and the magnetic field that makes a motor function.

An electric motor is a machine that will convert the electric energy to mechanical energy. In this a commutator is used to change the direction of current.

When the direction of flow of current is made to change, the magnetic field also reverses the direction.

There are different types of motors like AC motor,DC motor, Induction motor etc.

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Kipish [7]

Answer:

19m/s

Explanation:

U= 4m/s

a = 0.5m/s²

t= 30s

V= U+at

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4 years ago

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Ilya [14]

Answer:

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4 years ago

The reason a charged balloon will stick to a wall is that?

kari74 [83]

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3 years ago

A 20-kilogram mass is traveling with a velocity of 3 m/s. What is the object's kinetic energy?

jolli1 [7]

solution

Given

mass= 20kg

velocity =3m/s

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4 0

4 years ago

A square, single-turn coil 0.132 m on a side is placed with its plane perpendicular to a constant magnetic field. An emf of 27.1

marta [7]

Answer:

0.35 T

Explanation:

Side, a = 0.132 m, e = 27.1 mV = 0.0271 V, dA / dt = 0.0785 m^2 / s

Use the Faraday's law of electromagnetic induction

e = rate of change of magnetic flux

Let b be the strength of magnetic field.

e = dФ / dt

e = d ( B A) / dt

e = B x dA / dt

0.0271 = B x 0.0785

B = 0.35 T

6 0

3 years ago