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Physics Unit 5 Quiz 3

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

If the switch in an electrical circuit is turned ON in an electric train's circuit, the circuit is _____ and the charges are running through the circuit.

a)

undisturbed

b)

open

c)

closed

d)

incomplete

2.

A conductor has low _____ while an insulator has high resistance.

a)

resistance

b)

density

c)

conductivity

d)

flammability

3.

A material that resists an electric current from passing through it is a(n) _____.

a)

insulator

b)

capacitor

c)

magnetic field

d)

conductor

4.

To limit a current by impeding the flow of charges, _____ are installed.

a)

resistors

b)

charges

c)

insulators

d)

metals

5.

If too many appliances are attached to one electric circuit you risk overloading the circuit due to _____.

a)

excess electric potential

b)

excess voltage

c)

excess current

d)

excess resistance

6.

One light bulb in a set of Christmas lights goes out and the entire set quits working because the light bulbs are in a(n) _____ circuit.

a)

direct

b)

series

c)

parallel

d)

alternate

7.

When current flows from a battery's positive terminal, through the circuit, and then back to the battery's negative terminal, that is _____.

a)

a dielectric

b)

alternating current

c)

direct current

d)

a diode

8.

What is the SI Unit of capacitance: the charge in coulomb that a capacitor will accept for the potential across it to change 1 volt.

a)

coulomb

b)

joule

c)

watt

d)

farad

9.

What is the unit of power = 1 joule per second?

a)

farad

b)

ampere

c)

joule

d)

watt

10.

To measure a system's electrical potential you use _____.

a)

amperes (amps)

b)

volts

c)

watts

d)

ohms

11.

Certain _____ are better conductors than others.

a)

metals

b)

capacitors

c)

magnetic fields

d)

insulators

12.

What is the SI unit of electric charge defined as the amount of electric charge by a current of one amp in 1 second.

a)

watt

b)

farad

c)

ampere

d)

coulomb

13.

A circuit's _____ is affected by the material type, the conducting wire's length and width, the temperature of the materials in the circuit, plus the component that are added to the circuit.

a)

resistance

b)

color

c)

density

d)

size

14.

Ohm's law is written as _____.

a)

M=DVM = \frac{D}{V}

b)

V=IRV = IR

c)

F=maF = ma

d)

W=fdW = fd

15.

A system's resistance is measured in _____.

a)

amperes (amps)

b)

ohms

c)

volts

d)

watts

16.

What units are used to measure an electrical system's current?

a)

watts

b)

volts

c)

amperes (amps)

d)

ohms

17.

What is the name for derived SI unit of electric potential 1 joule of energy per coulomb of charge, J/C

a)

watt

b)

ohm

c)

volt

d)

coulomb

18.

Since a magnet has a north and a south pole it is _____.

a)

dipolar

b)

polar

c)

extrapolar

d)

monopolar

19.

Explain why high voltage power lines are more efficient than lower voltage lines carrying the same power.

a)

The I2RI^2R losses are less because the current is less for the same amount of power.

b)

Copper can be used in transmission lines.

c)

Power stations can be built larger.

d)

Power losses are less because higher current can be used.

20.

If the switch in an electrical circuit is turned OFF in a lamp's circuit, the circuit is _____ and the charges are not running through the circuit.

a)

opened

b)

undisturbed

c)

completed

d)

closed