T6 L4 Electric and Magnetic Interactions

Discuss the applications of electromagnetic induction in daily life.

• Generators, transformers, induction cooktops, and electric motors

• Bicycles, skateboards, and scooters

• Plumbing, carpentry, and gardening

• Refrigerators, microwaves, and toasters

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Using the right hand grip rule for a single wire carrying a current, A represents the direction of the

• current

• magnetic field

Answer explanation

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When there is a change in the magnetic field in a closed loop of wire

• (a) a voltage is induced in the wire
• (b) current is made to flow in the loop of wire 
• (c) electromagnetic induction occurs
• (d) all of these

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Thrust a magnet into a coil of wire. While the magnet is being moved toward the coil 

• (a) becomes an electromagnet
• (b) has a current in it
• (c) both of these 
• (d) neither of these

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 If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed
into a coil with twice the number of loops,

• a. one-half as much voltage is induced.
• b. the same voltage is induced.
• c. twice as much voltage is induced.
• d. four times as much voltage is induced.

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A device that converts electrical energy into mechanical energy

• A. electromagnet
• B. electromagnetic induction
• C. electric motor
• D. electromagnetism

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A device that converts mechanical energy into electrical energy

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. mechanical  generator

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What is created when a magnet moves through a coil of wire?

• A. an electromagnet
• B. a ferromagnet
• C. a solenoid
• D. an electric current

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This object is an

• electromagnet

• electric motor

• electric generator

• galvanometer

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This object is an

• electromagnet

• electric motor

• electric generator

• galvanometer

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