Deck 4: Electricity, Magnetism, and Electromagnetism

Question 1

The smallest unit of electrical charge is the __________.

A) electron
B) proton
C) neutron
D) neutrino

Answer 1

electron

Question 2

Alternating current is produced by a ___________.

A) battery
B) generator
C) capacitor
D) semiconductor

Answer 2

generator

Question 3

What is the unit of electric potential?

A) Watt
B) Amp
C) Volt
D) Ohm

Answer 3

Volt

Question 4

In the United States, alternating current goes through a complete cycle every _____ second.

A) 1/120
B) 1/100
C) 1/60
D) 1/30

Question 5

When a group of dipoles are aligned, they create _________________.

A) a magnetic domain
B) paramagnetic material
C) magnetic resonance
D) a north pole

Question 6

On the surface of an electrified object, the charges concentrate on the __________.

A) top side
B) underside
C) sharpest curvatures
D) smoothest curvatures

Question 7

Rubber and glass are ___________.

A) semiconductors
B) conductors
C) insulators
D) superconductors

Question 8

An electric potential applied to a conductor produces __________.

A) an electric current
B) a magnetic field
C) an electric insulator
D) Both A and B

Question 9

The charges on an electrified object are distributed __________.

A) in the center of the object
B) on the side nearest the charge
C) on the topside of the object
D) evenly throughout the object

Question 10

What is the SI unit of magnetic field strength?

A) Ampere
B) Tesla
C) Dipole
D) Ohm

Question 11

Electrostatic force is _________ proportional to the distance between charges, and _______ proportional to the product of the charges.

A) directly, inversely
B) inversely, directly
C) inversely, inversely
D) directly, directly

Question 12

Like charges _______ and unlike charges _______.

A) repel, repel
B) attract, attract
C) attract, repel
D) repel, attract

Question 13

Electrification occurs through the movement of ___________.

A) protons only
B) protons and electrons
C) electrons only
D) electrons and neutrons

Question 14

A _________ is a source of direct current.

A) wall socket
B) battery
C) generator
D) spark

Question 15

Electrical power is measured in _____.

A) coulombs
B) amperes
C) volts
D) watts

Question 16

A ___________ uses direct current.

A) hair dryer
B) toaster
C) microwave
D) flashlight

Question 17

A charged particle in motion creates a(n) ______________.

A) negative charge
B) positive charge
C) magnetic field
D) electrostatic charge

Question 18

The rotation of electrons on their axis is the property called ____________.

A) magnetic force
B) electron spin
C) unified field theory
D) magnetic induction

Question 19

An alternating (AC) current is represented by a __________ line.

A) sinusoidal
B) horizontal
C) vertical
D) descending

Question 20

What is Ohm's law?

A) I = V/R
B) V = I/R
C) R = VI
D) I = VR

Question 21

Water is a ___________ material.

A) paramagnetic
B) magnetic
C) diamagnetic
D) ferromagnetic

Question 22

What type of material can be made magnetic when placed in an external magnetic field?

A) Diamagnetic
B) Ferromagnetic
C) Paramagnetic
D) Nonmagnetic

Question 23

Like magnetic poles ________ and unlike magnetic poles ________.

A) attract, attract
B) repel, repel
C) repel, attract
D) attract, repel

Question 24

The magnetic intensity of an electromagnet is greatly increased by the addition of a(n) __________ core.

A) wood
B) iron
C) aluminum
D) copper

Question 25

The force between magnetic poles is proportional to the ________ of the magnetic pole strengths, divided by the ________ of the distance between them.

A) square, sum
B) sum, square
C) square, product
D) product, square