Electricity and Magnetism

How does changing the amount of charge affect electric forces?

• It has no effect on the electric force
• It increases the electric force
• It decreases the electric force
• It changes the direction of the electric force

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What factors determine the strength of electric forces?

• The amount of charge and the magnetic strength
• The amount of current and the magnetic strength
• The amount of current and the distance between the charges
• The amount of charge and the distance between the charges

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Increasing the strength of the magnetic field produced by a coil will make the electromagnet able to attract _______ materials more strongly.

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How do the number of turns in a coil or the strength of a magnet influence the performance of devices like electromagnets or electric motors?

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How do the amounts of charge or current affect the forces?

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In electric and magnetic interactions, what can the forces be?

• Only attractive
• Neither attractive nor repulsive
• Only repulsive
• Both attractive and repulsive

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In an electromagnet, increasing the number of turns in the coil or the amount of ______ flowing through the coil will increase the strength of the magnetic field it produces.

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What is an electromagnet and how does it combine electric and magnetic forces?

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You can create a strong magnetic field by running a current through a ________ wire.

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What do magnetic forces apply to move?

• Charged particles
• Electric fields
• Magnetic fields
• Gravity

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