Electrical Induction

A balloon has a negative charge.  The glass rod has a positive charge.  What will happen when the glass rod is brought near the balloon?

• The balloon will be attracted to the rod

• The balloon will be repelled by the rod

• The balloon will remain in place

• The balloon will spin in circles

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NGSS.HS-PS2-4

Two small hollow metal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attract sphere A. Which statements can be correctly concluded about the charge on the spheres?

• A has a positive charge

• B has a negative charge

• A and B have opposite charges

• A is neutral

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NGSS.HS-PS2-4

NGSS.HS-PS3-5

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• positive charge.

• negative charge.

• neutral charge

• charge at all

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NGSS.MS-PS2-3

Voltage can be induced in a wire by

• moving the wire near a magnet.

• moving a magnet near the wire.

• changing the current in a nearby wire.

• all of these

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NGSS.HS-PS2-5

What would happen if I move a bar magnet in and out of a coil of copper wire?

• Electric current would disappear 

• The magnet would explode 

• Electric current will flow through the wire

• It would produce a gravitational field

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NGSS.HS-PS2-5

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,

• one-half as much voltage is induced.

• the same voltage is induced.

• twice as much voltage is induced.

• four times as much voltage is induced.

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NGSS.HS-PS2-5

Which pairs of materials could be used to create electromagnetic induction?

• Coiled wire, a magnet

• Coiled wire, a battery

• A magnet, a battery

• None of the above

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NGSS.HS-PS2-5

What is the principle behind electrical induction?

• Faraday's Law of Induction

• Ohm's Law

• Coulomb's Law

• Newton's Third Law

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NGSS.HS-PS3-5

Which of the following devices operates on the principle of electromagnetic induction?

• Transformer

• Battery

• Resistor

• Capacitor

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NGSS.HS-PS2-5

In an experiment, a coil is moved through a magnetic field. What is observed?

• A current is induced in the coil

• The coil becomes magnetized

• The magnetic field disappears

• The coil heats up

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