Electric Current

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm

• 3 Ohms

• 4 Ohms

• 12 Ohms

Voltage is simply defined as...

• what 'pushes' electrons

• what 'stops' electrons

• moving electrons

What will happen if you increase the electric current that is flowing through an electromagnet?

• The magnet will become weaker.

• The poles of the magnet will reverse.

• The magnet will become stronger.

• The magnet will become permanent.

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NGSS.MS-PS2-3

When an electric current flows through a wire:

• a gravitational field is created around the wire.

• the wire becomes very cold.

• the wire begins to spin.

• a magnetic field is created around the wire.

Which of the following procedures would increase the amount of electricity that is produced in a generator?

• Add more coils of wire.

• Spin the magnet more slowly.

• Use a weaker magnet.

• Reduce the number of coils of wire.

Which of the following is true about the relationship between electricity and magnetism?

• Electricity can be used to create a magnet.

• Magnetism and electricity cannot be converted into one another.

• Magnetism is based on how gravity attracts electrical energy.

• Electrical energy and magnetism cancel each other out.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

A coil of wire with an electric current passing through it has what effect on a magnet?

• The magnet is not affected by the current.

• The positive pole of the magnet is attracted to the electric current.

• The magnet loses its magnetism.

• The magnet reverses its polarity.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

What are needed to make a complete closed circuit?

• buzzer, bulb, switch

• battery, buzzer, bulb

• battery, bulb, wires

• switch, bulb, wires, buzzer

Electricity happens when ... move from one place to another.

• battery

• light

• electrons

• electromagnet

Tags

NGSS.MS-PS2-3

What is a battery?

• a power source that gives out electricity

• a device for making and breaking the connection in an electric circuit

• a flexible metal thread to connect parts of an electric circuit

• a beeper or an audio signaling device