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Direct Current DP024

Total questions: 71

Worksheet time: 2hrs 37mins

Name
Class
Date
1.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
2.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
3.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
4.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
5.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
6.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
7.
Current times Resistance equals
 (I X R)
a)
Power
b)
Voltage
c)
Amperage
d)
Ohm
8.

Voltage divided by Current

(V / I)

a)

Current

b)

Power

c)

Resistance

d)

Watts

9.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
10.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
11.

Two resistors having values 5 ohms and 10 ohms are connected in series to a 10 V source. Find the current flowing through the circuit:

a)

0.66 A

b)

1.5 A

c)

2 A

d)

2.5 A

12.

Define electric current

a)

the total charge, Q flowing through the area per unit time, t.

b)

the total current, I flowing through the area per unit time, t.

c)

the rate of capacitance flow through a conductor.

d)

the rate of current flow through a conductor

13.

1 ampere of current is defined as ......

a)

one coulomb of current passing through the surface area in one second.

b)

one coulomb of charge passing through the conductor in one second

c)

one coulomb of charge passing through the surface area in one second

d)

one coulomb of currrent passing through the conductor in one second.

14.

Resistivity is defined as .....

a)

the capacitance of a unit length per unit cross-sectional area of the material

b)

the resistance of a unit length per unit cross-sectional area of the material

c)

the capacitance of a unit cross-sectional area per unit length of the material

d)

the resistance of a unit cross-sectional area per unit length of the material

15.

What type of quantity does the current belongs to?

a)

a base and vector quantities

b)

a base and scalar quantities

c)

a derived and vector quantities

d)

a derived and scalar quantities

16.

From the equation, we know that the resistance of a conductor depends on..?

a)

length of conductor

b)

cross sectional area

c)

type of material

d)

volume of the wire

17.

State Ohm's Law.

a)

the potential difference across a metallic conductor is proportional to the resistance flowing through it if its temperature is constant.

b)

the resistance across a metallic conductor is proportional to the current flowing through it if its temperature is constant.

c)

the potential difference across a metallic conductor is proportional to the current flowing through it if its temperature is constant.

d)

the current across a metallic conductor is proportional to the potential difference flowing through it if its temperature is constant.

18.

Which equation defines Ohm's Law?

a)

V=IV

b)

R=VI

c)

I=VR

d)

V=IR

19.

If the resistor are connected in parallel in a circuit which one has the highest current?

R1 < R2 < R3 < R4 R_1\ <\ R_{2\ }<\ R_3\ <\ R_4\  

a)

R1R_1  

b)

R2R_2  

c)

R3R_3  

d)

R4R_4  

20.

Which of the following parameter DOES NOT alter the electrical resistance of a piece of metal wire?

a)

The temperature of the wire

b)

The diameter of the wire

c)

The type of material of the wire

d)

The direction of the current flow in the wire

21.

What happens to the resistance of a resistor when the temperature is increased?

a)

Increases

b)

decreases

c)

stay the same

d)

vary randomly

22.
Factor which does not affect the resistance
a)
Type of material
b)
Length of material
c)
Mass of the material
d)
Area of the material
23.
The unit to measure the resistivity of a wire is 
a)
ohms
b)
Volt 
c)
ohms.m
d)
ohms.s
24.
Materials that have a high electrical resistance
a)
less length
b)
less tempareture 
c)
more thickness 
d)
less cross sectional area
25.

What happens to resistance when the length of the wire increases?

a)

Stays the same

b)

Increases

c)

Decreases

26.

For the graph shown in the figure, what physical quantity does the slope of the graph represent for ohmic material?


a)

power

b)

resistivity

c)

resistance

d)

1/(resistance)

27.

Which circuit diagram represents the correct way to measure the current in a resistor?

a)
b)
c)
d)
28.
As resistors are added in series to a circuit, the total resistance will...
a)
increase
b)
decrease
c)
stay the same
29.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
30.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
31.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
32.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
33.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
34.

Conventionally, current is described as flowing from the ................ terminal of a battery to the ................ terminal.

a)

Negative.....negative

b)

Negative....positive

c)

Positive......negative

d)

Positive....positive

35.

This is the symbol for

a)

ammeter

b)

light bulb

c)

resistor

d)

voltmeter

36.

This is the symbol for

a)

ammeter

b)

light bulb

c)

resistor

d)

voltmeter

37.

Effective resistance increases when in .............. circuit.

a)

Parallel

b)

Series

c)

Open

d)

Closed

38.

Effective resistance decreases when in .............. circuit.

a)

Parallel

b)

Series

c)

Open

d)

Closed

39.

For the circuit shown, the resistances are R1 > R2 > R3. What is true about the current through each resistor?

a)

I1 = I2 = I3

b)

I1 > I2 > I3

c)

I1 > I3 > I2

d)

I1 < I3 < I2

40.

What type of circuit is this?

a)

series

b)

simple

c)

open

d)

parallel

41.

ρ\rho has a unit of ..........

a)

Ω\Omega

b)

Ωm\Omega m

c)

Ωm2\Omega m^2

d)

Ωm3\Omega m^3

42.

we use  ρlA\frac{\rho l}{A}  to find .........

a)

PP  

b)

VV  

c)

II  

d)

ρ\rho  

e)

RR  

43.

Which wire would have greater resistance?

a)

The Blue Wire

b)

The Red Wire

c)

They would have equal resistance

44.

Diagram shows the flow of

a)

Alternating Current

b)

Direct Current

c)

Floating current

d)

Fluctuating current

45.

A dry-cell battery produces ____.

a)

a direct current

b)

an alternating current

c)

both direct and alternating current

d)

the same current that a generator produces

46.

An electric current flowing in one direction only

a)

fluctuating current

b)

direct current

c)

alternating current

d)

simple current

47.

What is the total resistance of the 4 x 100 Ω resistors connected as shown in the diagram?

a)

50 Ω

b)

400 Ω

c)

200 Ω

d)

100 Ω

48.

Quantity of charge can be measured in

a)

time (s)

b)

Ampere (A)

c)

coulombs (C)

d)

Joule (J)

49.

This picture is an example of a

a)

series circuit

b)

parallel circuit

c)

Alternating current

d)

I do know and do not wish to guess.

50.
Good conductors are _______ resistors
a)
bad
b)
good
51.
Good insulators are _______ resistors
a)
good
b)
bad
52.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
53.
Which of the following does not determine the resistance of a wire?
a)
temperature
b)
color
c)
length
d)
diameter
54.

What is the function of a resistor?

a)

Stop current flow

b)

Limit current flow

c)

Limit voltage

d)

To light up

55.

When the second bulb is added, they get

a)

brighter

b)

dimmer

c)

broken

d)

cold

56.

What is the measuring device shown?

a)

bulb

b)

cell

c)

ammeter

d)

voltmeter

57.

What can you say about the current in the series circuit?

a)

it splits across the components

b)

it changes constantly

c)

it is different in different places

d)

it is the same everywhere

58.

If the ammeter says the current is 5A, what is the current flowing through one bulb?

a)

2.5A

b)

10A

c)

5A

d)

0

59.

If one bulb was broken, what would happen?

a)

current would no longer flow, so everything would be off

b)

the ammeter would measure a current from the other bulb

c)

the switch would keep the current flowing

d)

the cell would burn out and catch fire

60.

If the switch was opened, what would happen?

a)

the ammeter would measure a current flowing

b)

current would no longer flow, so everything would be off

c)

the bulbs would stay on because they're connected to the cell

d)

the bulbs would burn out and catch fire

61.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
62.
What will happen if one light bulb is removed from this circuit?
a)
The other bulbs will go out.
b)
The other bulbs will stay on
c)
The other bulbs will get dimmer.
d)
The battery will become stronger.
63.
When you remove a bulb from a three bulb circuit, and the other two bulbs go off, then the bulbs must have been connected in __________.
a)
parallel
b)
series
c)
open
d)
closed
64.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
65.
What kind of circuit is this?
a)
series
b)
parallel
66.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
67.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
68.
Parallel circuits are
a)
a circuit that has only one path for current to travel
b)
has more than one path for current to travel
c)
a circuit that does not allow electricity to travel through it
d)
magnets that cause electric current
69.

Which item(s) in the circuit will work?

a)

light bulb

b)

buzzer

c)

battery

d)

none of the items will work

70.

What happens to total current in a series circuit when the total voltage stays the same, circuit resistance decreases, current will ____________.

a)

increase

b)

Stay the same

c)

Decrease

71.

Nama penuh sir yus

a)

tuan yusnizi bin tuan shukri

b)

tuan sukri bin tuan yusnizi

c)

tuan yusnizi bin tuan sukri

d)

tuan yusnizi binti tuan sukri

e)

tuan yusnizi bin tuan syukri

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