Deck 4: Electricity, Magnetism, and Electromagnetism

Question 1

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

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

Answer 1

sharpest curvatures

Question 2

What is the unit of electric potential?

A) watt
B) amp
C) volt
D) ohm

Answer 2

volt

Question 3

Electrical power is measured in _____.

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

Answer 3

watts

Question 4

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 5

Alternating current is produced by a _____.

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

Question 6

A _____ uses direct current.

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

Question 7

The smallest unit of electrical charge is the _____.

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

Question 8

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

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

Question 9

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 10

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 11

Like charges _____ and unlike charges _____.

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

Question 12

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 13

What is the SI unit of magnetic field strength?

A) ampere
B) tesla
C) dipole
D) ohm

Question 14

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

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

Question 15

What is Ohm's law?

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

Question 16

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 17

Electrification occurs through the movement of _____.

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

Question 18

Rubber and glass are _____.

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

Question 19

A _____ is a source of direct current.

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

Question 20

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

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

Question 21

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

Question 22

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 23

Water is a _____ material.

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

Question 24

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

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

Question 25

Like magnetic poles _____ and unlike magnetic poles _____.

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