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Taher - Physics - electric current

Total questions: 50

Worksheet time: 36mins

Name
Class
Date
1.

A motor is working on with 3.0 A for 4.0 min. the amount of charge that go through the motor is ...

a)

720 C

b)

12 C

c)

2700 C

d)

7000 C

2.

what is the time needed to the current of 2.5 A , and 1000 C charges to go ? .

a)

400 s

b)

250000 s

c)

160 s

d)

500 s

3.

This is an example of a _______ circuit

a)

open

b)

series

c)

parallel

d)

square

4.
If the Voltage stays the same and Resistance is increased, Current will 
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
5.
In a series circuit, which of the following is the same throughout the circuit?
a)
Resistance
b)
Voltage
c)
Current
d)
Power
6.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
7.
What does power mean?
a)
Joules transferred per second
b)
Electron flow per second
c)
Speed of electrons
d)
Electron energy
8.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
9.
What is the unit of power?
a)

Ohms

b)
Volts
c)
Amps
d)

Watts

10.
What voltage is needed to produce 2A of current through a 10Ω resistor?
a)
20V
b)
0.2V
c)
5V
d)
2V
11.
A circuit with 3 resistors, 20 Ohms, 10 Ohms, and 20 Ohms are in series. What is the total resistance?
a)
43 Ohms
b)
50 Ohms
c)
60 Ohms
d)
33 Ohms
12.
Good conductors are _______ resistors
a)
bad
b)
good
13.
Good insulators are _______ resistors
a)
good
b)
bad
14.
What characteristics impact resistance of a material?
a)
Thickness 
b)
Temperature
c)
Length
d)
All of these
15.
If the current increases it could be because of...
a)
increasing voltage
b)
decreasing resistance
c)
both
16.
Electrical energy is converted to _______ energy in a hair dryer.
a)
heat 
b)
light
17.
The symbol for 1 _____ is A
a)
acceleration
b)
current
c)
ampere
d)
coulomb
18.

Charged particles that flow continuously through material is called

a)

Insulator

b)

Electric Current

c)

Flashlight

d)

closed circuit

19.

A device that converts chemical energy into electrical energy is call a

a)

battery

b)

conductor

c)

parallel circuit

d)

flashlight

20.

A potential difference of 24 V is applied to a 150 resistor. How much current flows through the resistor?

a)

0.15 A

b)

3600 A

c)

6.25 A

d)

0.16 A

21.

This is an example of a ______ circuit

a)

Series

b)

Parallel

c)

Open

d)

Dihexihedral

22.
Current is...
a)
moving protons
b)
moving electrons
c)
measured in volts
d)
measured in ohms
23.

One watt is equal to,

a)

one meter per second

b)

one Joule per second

c)

One ampere per second

d)

one farad per second

24.
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
a)
170 W
b)
170 A
c)
1.7 V
d)
1.7 W
25.

What is the name of this component?

a)

battery

b)

cell

c)

open switch

d)

lamp

26.

What is the name of this component?

a)

fuse

b)

cell

c)

battery

d)

wire

27.

Identify this symbol.

a)

Ammeter

b)

Voltmeter

28.

Identify this symbol.

a)

Ammeter

b)

Voltmeter

c)

Resistor

29.

A current of 2 A is flowing through a conductor.

How long does it take for 10 C of charge to pass any point?

a)

0.2 s

b)

5 s

c)

12 s

d)

20 s

30.

A battery moves a charge of 60 C around a circuit in a time of 20 s.

What is the average current in the circuit?

a)

0.30 A

b)

3.0 A

c)

40 A

d)

1200 A

31.

What size resistor would produce a 3 A current flow with a 12 Volt battery

a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
32.
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
33.

How many Volts would we need to produce a current flow of 8 A through a 6 Ohm resistor

a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
34.
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
35.
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
a)
10 volts
b)
1 volt
c)
48 volts
d)
5 volts
36.

What is the formula for ohms law?

a)

V= i / R

b)

R X V = i

c)

V= i x R

d)

R= i x V

37.
What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts
a)
15 Ohms
b)
4 Ohms
c)
0.3333 Ohms
d)
2 Ohms
38.

La unidad de medida de la Intensidad de Corriente es

a)

Voltios

b)

Amperios

c)

Ohmnios

d)

Omegas

39.

which formula is correct?

a)

R = V x I

b)

V = I x R

c)

I = V x R

d)

V= I +R

40.

Which one of the following quantities is equivalent to 1 W?

a)

1 V/A

b)

1 Ω • m

c)

1 V • A

d)

1 V/Ω

41.

A kilowatt-hour is equivalent to

a)

1000 W.

b)

3600 J.

c)

3,600,000 J/s.

d)

3,600,000 J.

42.

What potential difference is required across an 8.0-Ω resistor to cause 2.0 A to flow through it?

a)

4.0 V

b)

16 V

c)

8.0 V

d)

32 V

43.

A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb?

a)

0.90 A

b)

0.36 A

c)

0.60 A

d)

2.0 A

44.

When 5.00 A is flowing through an 10.0-Ω device, how much power is being dissipated in the device?

a)

50.0 W

b)

250 W

c)

500 W

d)

2.50 kW

45.

How much energy does a 100-W light bulb use in 8.0 hours?

a)

0.0080 kWh

b)

0.80 kWh

c)

13 kWh

d)

800 kWh

46.

Which of the following equations is an equation for power, involving current and resistance?

a)

P= I/V

b)

P = IR

c)

P = IVR2

d)

P = I2R

47.

If electrical power costs $0.12/kwh, and I use 9 x 108 Joules of electrical energy, what will I be charged?

a)

$10

b)

$20

c)

$30

d)

$40

48.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
49.

An instrument is rated at 240 W if it is connected across a 120-V dc power supply.

(a) What current does it draw under normal operation?

(b) What is its resistance?

a)

(a) 0.20 A (b) 360 Ω

b)

(a) 60 A (b) 2.0 Ω

c)

(a) 2.0 A (b) 60 Ω

d)

(a) 0.2 A (b) 60 Ω

50.

Calculate the energy consumed by a heater of 350W in 7 hours of working.

a)

50 kWh

b)

50 Wh

c)

2450 W

d)

2,45 kWh

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