Module 2

Question 1

a material that loses all its electrical resistance at temperatures near absolute zero

Answer 1

Superconductor

Question 2

a resistor with a resistance that cannot change

Answer 2

Fixed resistor

Question 3

rate of energy production or consumtion

Answer 3

Power

Question 4

variable resistor having high resistance

Answer 4

Potentiometer

Question 5

variable resistor having a low resistance

Answer 5

Rheostat

Question 6

device that can store electric charge

Answer 6

Capacitor

Question 7

unit of capacitance

Answer 7

Farad

Question 8

magnetic effect that occurs in a coil of wire when the current changes

Answer 8

Induction

Question 9

coil of wire with a movable magnetic core

Answer 9

Solenoid

Question 10

a switch that operates by electricity

Answer 10

Relay

Question 11

Materials that lose their electrical resistance at very low temperatures are called _____.

Answer 11

Superconductors

Question 12

What is the name for components that add resistance to a circuit?

Answer 12

Resistors

Question 13

The resistance of a(n) _____ resistor cannot be changed.

Answer 13

Fixed

Question 14

To read the resistor color code, you start with the band at the _____ and read toward the band at the _____.

Answer 14

End; Center

Question 15

When choosing a resistor, you must consider the required _____ and the amount of _____ the resistor must carry.

Answer 15

Resistance; Power

Question 16

Rheostats and potentiometers both have _____ terminals.

Answer 16

Three

Question 17

Is a rheostat intended to vary current or potential difference?

Answer 17

Current

Question 18

Potentiometers and rheostats are rated according to the amount of _____ they can handle.

Answer 18

Power

Question 19

A capacitor is a device that can store electrical _____.

Answer 19

Charge

Question 20

Capacitance is the amount of _____ a capacitor can store, compared to the _____ between its terminals.

Answer 20

Charge; Potential difference

Question 21

A variable capacitor has two sets of plates, one called the _____ and the other called the _____.

Answer 21

Rotor; Stator

Question 22

To achieve higher capacitance, how do you connect two capacitors?

Answer 22

In parallel

Question 23

The magnetic effect that occurs in a coil when the current changes is called _____.

Answer 23

Induction

Question 24

When the magnetic field of one coil produces a current or potential difference in another, the effect is called _____.

Answer 24

Mutual induction

Question 25

An inductor resists current when the current _____, and aids the current when the current _____.

Answer 25

Increases; Decreases

Question 26

Solenoids and relays are _____ used as transducers.

Answer 26

Electromagnetic coils