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WorksheetsCurrent Electricity
Total questions: 28
Worksheet time: 25mins
Name
Class
Date
1.
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
2.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
3.
If the voltage stays the same and resistance is increased, current will ________.
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
4.
Find total resistance
total current
and the voltage through resistor 3.
total current
and the voltage through resistor 3.
a)
60 Ohms, 0.4 A, 8 V
b)
60 Ohms, 2.5 A, 4 V
c)
90 Ohms, 2.5 A, 24 V
d)
60 Ohms, 0.4 A, 24 V
5.
What is the power of a 3V light bulb with 20 A running through it?
a)
0.15W
b)
6W
c)
60W
d)
6.67W
6.
If a battery produces 12.6 Volts, what would be the current for a 6 Ohm resistor?
a)
2.1 Amps
b)
75.6 Amps
c)
0.5 Amps
d)
15 Amps
7.
A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms?
a)
375 Amps
b)
50 Amps
c)
15 Amps
d)
0.07 Amps
8.
Two resistors are connected to a source of voltage as shown in the diagram below. At which position should an ammeter be placed to measure the current passing only through resistor R1?
a)
1
b)
2
c)
3
d)
4
9.
A 2.0-ohm resistor and a 4.0-ohm resistor are connected in series with a 12-volt battery. If the current through the 2.0-ohm resistor is 2.0 amperes, the current through the 4.0-ohm resistor is
a)
1.0 A
b)
2.0 A
c)
3.0 A
d)
4.0 A
10.
Where should an ammeter be located to correctly measure the total current and where should a voltmeter be located to correctly measure the total voltage?
a)
ammeter at 3 and voltmeter at 4
b)
ammeter at 1 and voltmeter at 4
c)
ammeter at 2 and voltmeter at 3
d)
ammeter at 1 and voltmeter at 2
11.
Resistors R1 and R2, connected in parallel, have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
a)
1 ohm
b)
4 ohms
c)
5 ohms
d)
8 ohms
12.
A 30.-ohm resistor and a 60.-ohm resistor are connected in an electric circuit as shown below. Compared to the electric current through the 30.-ohm resistor, the electric current through the 60.- ohm resistor is
a)
smaller
b)
larger
c)
cannot be determined
d)
the same
13.
An electric circuit contains an operating heating element and a lit lamp. Which statement best explains why the lamp remains lit when the heating element is removed from the circuit?
a)
The lamp has less resistance than the heating element.
b)
The lamp has more resistance than the heating element
c)
The lamp and heating element were connected in parallel.
d)
The lamp and heating element were connected in series.
14.
How much time is required for an operating 60-watt light bulb to use 120 joules of electrical energy?
a)
2 sec
b)
.2 sec
c)
.5 sec
d)
5 sec
15.
What is the current measured by ammeter A?
a)
0.5 Amps
b)
2 Amps
c)
72 Amps
d)
6 Amps
16.
What is the voltage drop across the 36 ohm resistor?
a)
12V
b)
3V
c)
0.33V
d)
24V
17.
A circuit is shown below. Which of the following is true of this circuit?
a)
It is series and therefore both resistors have the same voltage
b)
It is series and therefore both resistors have the same current
c)
It is parallel and therefore both resistors have the same voltage
d)
It is parallel and therefore both resistors have the same current
18.
Two identical lamps, L1 & L2, are connected to a constant voltage power supply. The voltage drop across L1 is 36V. What is the voltage of the power supply?
a)
18V
b)
36V
c)
6V
d)
72V
19.
Define electric current.
a)
It is the work done by the source in driving charges around a complete circuit.
b)
It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
c)
It is the work done by the source in driving a unit charge around a complete circuit.
d)
It is a measure of the flow of electric charge through a given cross-section of a conductor.
20.
What is the SI unit of electric current?
a)
Watts
b)
Voltage
c)
Joules
d)
Ampere
21.
What does the arrows in the circuit represents?
a)
conventional current
b)
eletromotive force
c)
electron flow
d)
voltage
22.
Which instrument is shown in the picture?
a)
voltmeter
b)
ammeter
c)
galvanometer
d)
multimeter
23.
What is the function of a dry cell?
a)
A conductor that connect the components together.
b)
A method of opening or closing the circuit.
c)
A source of electromotive force that drives electric charges around the circuit.
d)
A load in which moving charges can do a useful job.
24.
What is the following component?
a)
dry cell
b)
fuse
c)
battery
d)
resistor
25.
What is the following component?
a)
dry cell
b)
fuse
c)
resistor
d)
rheostat
26.
What is the following component?
a)
fixed resistor
b)
rheostat
c)
fuse
d)
ammeter
27.
What does the diagram shows?
a)
an open circuit
b)
a close circuit
c)
a short circuit
d)
a long circuit
28.
What is the formula for current?
a)
I = t/Q
b)
I = W/Q
c)
I = Q/t
d)
I = W/t
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