Aqa Electromagnetism and Reflection

A compass needle responds to a magnetic field, because the compass needle is a

• A. generator

• B. motor

• C. magnet

• D. transformer

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Electric current is measured in ____________.

• Newtons (N)

• Amperes (A)

• Hertz (Hz)

• Volts (V)

A _______________ is a current-carrying coil of wire with lots of loops.

• magnet

• electromagnet

• solenoid

• compass

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Increasing the number of coils in an electromagnet will _________ the power of the magnet.

• decrease

• increase

• not affect

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What three minerals are attracted to a magnet?

• Gold, copper, cobalt

• Cobalt, aluminum, silver

• Iron, copper, aluminum

• Iron, nickel, cobalt

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In order for an electromagnet to be formed, an __________​ (a)   current must pass through a coil of __________ ​ (b)   wrapped around an ________ core. (c)   ​

• electric
• wire
• iron

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NGSS.HS-PS2-5

What is created when a wire moves between the poles of a magnet?

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

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NGSS.HS-PS2-5

According to the Right Hand Rule, where is the magnetic field generated around a current-carrying wire?

• in the direction oy your thumb

• in the direction of your curled fingers

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How can you increase the magnetic field strength in an electromagnet?

• Increase the number of coils.

• increase the voltage

• increase the current by reducing the resistance of the coil

• all of the above

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NGSS.HS-PS2-5

How can you decrease the magnetic field strength in an electromagnet?

• Increase the number of coils.

• increase the voltage

• decrease the current by increasing the resistance of the coil

• all of the above

Tags

NGSS.HS-PS2-5

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