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Electric Fields, Force, Circuits

Total questions: 57

Worksheet time: 57mins

Name
Class
Date
1.

A positively charged subatomic particle

a)

proton

b)

neutron

c)

electron

d)

newton

2.

A negatively charged subatomic particle

a)

proton

b)

neutron

c)

electron

d)

nucleus

3.

Process of charging a neutral object by touching it with a charged object

a)

polarization

b)

conduction

c)

induction

d)

friction

4.

A substance in which electrons are loosely held; for example: copper

a)

conductor

b)

insulator

c)

inductor

d)

convection

5.

A force exerted by a charged particle

a)

electric field

b)

gravitational field

c)

magnetic field

d)

soccer field

6.
Unit of charge
a)
Newton
b)
Joule
c)
Volt
d)
Coulomb
7.
The photo demonstrates the__________experiment  which was conducted by__________.
a)
oil drop; Ernest Rutherford
b)
atomizing; J.J Thomson
c)
oil drop; Robert Millikan
d)
Crookes Tube; Sir William Crooke
8.
How many electrons are necessary to produce 1.0 C of negative charge? (e = 1.60 × 10-19 C)
a)
6.3 × 1018 
b)
6.3 × 109 
c)
1.6 × 1019 
d)
1.6 × 109 
9.

A charged balloon is brought near an electroscope but does not touch the electroscope. This is an example of charging by

a)

conduction

b)

convection

c)

friction

d)

induction

10.
Removing a static charge by providing a path to the ground is called __.
a)
electric transfer
b)
grounding
c)
switching
d)
seperation
11.

Electrons move only within their atoms. The electrons react to electric fields, resulting in individual atoms having charged ends that are attract to charged objects

a)

friction

b)

conduction

c)

polarization

d)

induction

12.

The loss of static electricity as electric charges transfer from one object to another

a)

power

b)

voltage

c)

static discharge

d)

current

13.
What is the unit for Electric Force?
a)
Newton
b)
Couloumb
c)
Newtons/Couloumb
d)
Nano
14.
When you draw the direction of the electric field you always use a ___________ test charge
a)
positive
b)
negative
c)
neutral
d)
radioactive
15.

What variable do Coulombs represent?

a)

Electric Charge

b)

Force

c)

Distance

d)

Mass

16.

What will happen to the Electric Force between 2 objects if the distance between them is is quadrupled?

a)

the force will decrease to 1/16 the original strength

b)

the force will increase by 1/16

c)

the force will increase by 4

d)

the force will decrease to 1/4 the original strength

17.
Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
a)
-1.5E-11 N
b)
2.5E-11 N
c)
-2.5E11 N
d)
-7.5E-10 N
18.

Which quantity and unit are correctly paired?

a)

electric field strength and N/C

b)

electricity and Coulombs

c)

electrostatic force and electrons

d)

electric field strength and E

19.
A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?
a)
4 N
b)
100 N
c)
40 N
d)
10 N
20.
Which of the following statements is false about electric field lines
a)
electric field lines cannot cross
b)
electric field lines point away from positive charge
c)
electric field lines are always straight lines
d)
electric field lines show how a proton would move in an electric field
21.
QA and QB are two charges creating an electric field. Based on the electric field lines, we can conclude
a)
QA and QB are both positive
b)
QA and QB are both negative
c)
QA is positive and QB is negative
d)
QA is negative and QB is positive
22.

What is Coulomb's Law?

a)

The strength of the force is determined by the size of the charge and the distance between the charged particles.

b)

Electric charge can neither be created nor destroyed but can be converted.

c)

There is an opposite and equal force to all charges

d)

Electric charge is transferred and transformed

23.

The change in electric potential energy for a charged particles is...

a)

kinetic energy

b)

electric potential difference

c)

current

d)

resistance

24.

What is the unit of electric potential difference?

a)

coulomb

b)

joule

c)

volt

d)

watt

25.

For every volt of electric potential, one Coulomb of charge will gain..

a)

1 watt of energy

b)

1 J of energy

c)

10 watts of energy

d)

10 J of energy

26.

For an electric charge, the change in potential energy is equal to...

a)

The initial kinetic energy

b)

The power in the circuit

c)

The amount of work done

d)

The change in kinetic energy

27.

Electricity that flows in a closed path is called a

a)

electric field path

b)

current

c)

circuit

d)

electric force field

28.

The flow of electricity in a circuit is called

a)

current

b)

flow

c)

circuit

d)

resistance

29.

Resistance is measured in _______________ .

a)

watts

b)

amperes

c)

ohms

d)

joules

30.
the tendency for a material to oppose the flow of electrons
a)
current
b)
circuit
c)
resistance
d)
difference
31.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
32.
As the resistance of a circuit increases, the current will
a)
increase
b)
decrease
c)
stay the same
33.
The difference in electrical potential energy between two places is called
a)
resistance
b)
friction
c)
induction
d)
voltage
34.
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?
a)
5 V
b)
12 V
c)
0.2 V
d)
20 V
35.
The insulating layer of a cacitor is called the 
a)
plate
b)
conductors
c)
dielectric
d)
terminals
36.
The two leads of the capacitor are connect to the 
a)
plates
b)
terminals
c)
conductors
d)
dielectric
37.
Capacitors well hold a charge until
a)
the applied voltage drops to zero
b)
5 time constants
c)
an external discharge path is provided
d)
1 time constant
38.
Capacitance is inversely proportional to 
a)
a charge
b)
dielectric thickness 
c)
plate area
d)
applied voltage
39.

What capacitance is needed to store 5.50 μC of charge at a voltage of 120 V (if Q=CV)

a)

250 uF

b)

.025 uF

c)

.046 uF

d)

40 uF

40.
With respect to the capacitor, which relationship is true?
a)
C = Q/V
b)
V = C×Q
c)
Q = C/V
d)
Q = V/C
41.
If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:
a)
C = ϵd/A 
b)
C = A/ϵd
c)
C = ϵA/d
d)
C = d/ϵA
42.

A/An _____ is a type of electric circuit in which there are multiple paths, whereas a/an _____ is a type of electric circuit in which there is a single current path.

a)

parallel connection, series connection

b)

series connection, parallel connection

c)

conductor, insulator

d)

insulator, conductor

43.

A/An _____ is an energy unit used to measure electric energy use by power companies.

a)

ampere

b)

volt

c)

kWh

d)

ohm

44.

A/An _____ is used to measure the voltage drop across a portion of a circuit.

a)

ammeter

b)

voltmeter

c)

resistor

d)

battery

45.

A/An _____ is used to measure the current through a portion of a circuit.

a)

ammeter

b)

voltmeter

c)

resistor

d)

battery

46.

In a series circuit, each circuit element has the same:

a)

current

b)

voltage

c)

capacitance

d)

resistance

47.

In a parallel circuit, each circuit element has the same:

a)

current

b)

voltage

c)

capacitance

d)

resistance

48.

Term that describes the sum of all the individual resistances in a series.

a)

parallel circuit

b)

series circuit

c)

equivalent resistance

d)

short circuit

49.

The light bulb in the circuit is an example of _______.

a)

load

b)

battery source

c)

energy pathway

d)

all of them

50.

This photo shows a charge in a uniform field.

a)

true

b)

false

51.
Once a capacitor is charged, the plates have an equal and ________ charge.
a)
matching
b)
negative
c)
opposite
52.

An electric heater is connected across a 120 V outlet. The heater dissipates 1320 W of power in the form of electromagnetic radiation and heat. Calculate the resistance of the heater.

a)

10.9 ohms

b)

.091 ohms

c)

11 ohms

53.

The unit for capacitance is named after this scientist.

a)

Robert Millikan

b)

Michael Faraday

c)

Albert Einstein

d)

Charles Coulomb

54.

A capacitor, connected to a 6 V battery, holds a 7.2 x 10-5 C of charge on each plate. What is the capacitance of the capacitor?

a)

1.2 x 10-5 F

b)

.083 x 10-7 F

c)

8.3 x 10-6 F

55.

When the space between the capacitor’s plates is not a vacuum, it can contain a material called a ….

a)

vacuum

b)

dielectric

c)

insulator

d)

farad

56.

The resistance of a steam iron is 19.0 Ω. What is the current in the iron when it is connected across a potential difference of 120 V?

a)

158 mA

b)

228 A

c)

6.32 A

d)

6.32 mA

57.

This shows how electrons move through a conductor, also known as __________ velocity.

a)

drift

b)

current

c)

slide

d)

voltage

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