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Charge, Current, Circuits

Total questions: 15

Worksheet time: 11mins

Name
Class
Date
1.

Select the unit for current

a)

C/s

b)

Cs

c)

A/s

2.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
3.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
4.

A large lightning bolt can carry up to 120000 A and 350 C. Calculate the time for which the current flows. 

a)

2.92 s

b)

0.0092 s

c)

2.92×103 min2.92\times10^{-3}\ \min

d)

2.92×1032.92\times10^{-3} s

5.

Which symbols are used for the units of current and of resistance?

a)

A

b)

B

c)

C

d)

D

6.

There is a current of 3.0A in a resistor for time t. During time t, a charge of 120C flows through the resistor.


What is time t ?

a)

0.025 minutes

b)

0.025 s

c)

40 minutes

d)

40 s

7.
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
8.
According to this law, the current in a circuit equals the voltage difference divided by the resistance. 
a)
Law of Conservation of Energy 
b)
Ohm's Law 
c)
Law of Conservation of Charges
d)
Newton's First Law 
9.

If a positive charge is brought near a negative charge, the charges will

a)

repel each other

b)

attract each other

c)

explode

d)

create a rift in the space-time contiuum

10.

The voltage of a circuit that has a resistance of 10 ohms and a current of 1.5 A is

a)

15 V

b)

0.15 V

c)

6.7 V

d)

None of these

11.

How much energy or pushing force available to move electrons through a circuit is known as __________ and is measured using __________.

a)

Resistance, Ohms

b)

Voltage, Volts

c)

Current, AMPS

12.
How much charge must pass by a point in 10 s for the current to be  0.50 A? 
a)
0,05C
b)
5,0C
c)
20C
d)
2,0C
13.
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
14.
(Look at picture for question)
a)
A device that opposes the flow of electrons
b)
A device that allows easy flow of electrons
c)
A device that can be used as a battery
d)
Resistors do not exist
15.

A charge of 48 C flows for 6s. What is the current?

a)

8 A

b)

288 A

c)

8 V

d)

288 V