Electricity and Magnetism Flashcard

Front

The force or push that causes electric charges to move is called _______.

Back

current

Front

Electric charges always flow from __________ areas to __________ areas.

Back

positive, negative

Front

A material through which electrons do NOT flow easily is a(n) _______.

Back

insulator

Front

Which of the following statements about electric charge is true?
Objects must be touching one another to exert electrical force.
Electrical forces act at a distance.
Air cannot conduct electricity; it is conducted only by solid materials.
Opposite electric charges always repel one another.

Back

Electrical forces act at a distance.

Front

Mr. Robinson's class needs to choose a good insulator. Which of the following could be used as an insulator? plastic plate, silver spoon, copper wire, gold necklace

Back

plastic plate

Front

Which of the following will increase the resistance of a wire?
Options:
using a thicker/wider wire,
using a shorter wire,
increasing the temperature of the wire,
using silver instead of copper

Back

increasing the temperature of the wire

Front

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

Back

1.8 amps

Front

Which two areas of physical science are closely related to the development of electric motors and generators?

Back

electricity and magnetism

Front

Which of the following will decrease the strength of the magnetic field around a wire? Options: increasing the current flowing through the wire, using less loops around the iron core, flipping the direction of the current flowing through the wire, using a larger iron core

Back

using less loops around the iron core

Front

Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?

Back

1.98 V