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WorksheetsUnit 12: Current Electricity Review
Total questions: 40
Worksheet time: 1hrs 18mins
Name
Class
Date
1.
In a water flow analogy, current is analogous to-
a)
water pipes
b)
water pump
c)
on-off valve
d)
water
2.
In a water flow analogy, a switch is analogous to-
a)
water pipes
b)
water pump
c)
on-off valve
d)
water
3.
In a water flow analogy, voltage in a circuit is analogous to-
a)
water pipes
b)
water pump
c)
on-off valve
d)
water
4.
In a water flow analogy, wires in a circuit are analogous to-
a)
water pipes
b)
water pump
c)
on-off valve
d)
water
5.
With the old Christmas lights, if one light bulb went out, all the other light bulbs would go out. This means the lights are connected in a-
a)
series
b)
parallel
c)
reverse
d)
different circuits
6.
Our classroom lights are connected so that if one bulb goes out the others remain on. This type of wiring is referred to as-
a)
series
b)
parallel
c)
reverse
d)
different circuits
7.
Which of the following is a poor conductor of electricity?
a)
aluminum
b)
graphite
c)
gold
d)
glass
8.
Which of the following is a good conductor of electricity?
a)
glass
b)
plastic
c)
rubber
d)
copper
9.
In order to avoid being shocked when working with live circuits, you should only touch-
a)
insulated switches
b)
resistors
c)
bare wires
d)
power supply terminals
10.
What are the specifications of a standard American outlet?
a)
15 V
b)
120 V
c)
220 V
d)
240 V
11.
Which has the highest electrical resistance value?
a)
conductors
b)
insulators
c)
semiconductors
d)
superconductors
12.
Which has the lowest electrical resistance value?
a)
conductors
b)
insulators
c)
semiconductors
d)
superconductors
13.
The electric company charges you based on-
a)
current used
b)
energy used
c)
power used
d)
voltage used
14.
A bulb connect to a wire with low resistance will have-
a)
no light
b)
a dim light
c)
a bright light
d)
an average light
15.
A bulb connected to a wire with high resistance will have-
a)
no light
b)
a dim light
c)
a bright light
d)
cannot be determined
16.
What is the total resistance?
a)
8.0
b)
36
c)
12
d)
0.13
17.
What is the total resistance?
a)
2.0
b)
29
c)
11
d)
0.50
18.
What is the total resistance?
a)
25
b)
5.0
c)
0.17
d)
6.0
19.
What is the total resistance?
a)
30.
b)
10.
c)
0.15
d)
6.7
20.
What is the total resistance?
a)
3.0
b)
0.34
c)
30.
d)
26
21.
What is the total resistance?
a)
10.
b)
20.
c)
3.8
d)
0.27
22.
What is the total electrical energy used by an 10.0 V battery when connected to a 18 ohm resistor for 40. seconds?
a)
4.5
b)
72
c)
220
d)
720
23.
What is the total electrical energy used by an 9.0 V battery when connected to a 20.0 ohm resistor for 35 seconds?
a)
140
b)
7.0 x 102
c)
36
d)
315
24.
What must be the same for all three resistors?
a)
current
b)
voltage
c)
energy
d)
power
25.
What must be the same for both resistors?
a)
current
b)
voltage
c)
energy
d)
power
26.
How can you calculate the voltage given the information from the graph?
a)
find the area under the curve
b)
find the multiple of the x and y intercepts
c)
find the inverse of the slope
d)
find the slope
27.
How can you calculate the resistance given the information from the graph?
a)
average the x and y intercepts
b)
find the product of the x and y intercepts
c)
find the inverse of the slope
d)
find the slope of the graph
28.
A 15A fuse is connected in series with a circuit containing a 240 V source. What is the minimum resistance required to prevent the fuse from melting?
a)
16 ohms
b)
0.063 ohms
c)
3600 ohms
d)
8 ohms
29.
A 10.A fuse is connected in series with a circuit containing a 120 V source. What is the minimum resistance required to prevent the fuse from melting?
a)
12 ohms
b)
480 ohms
c)
0.083 ohms
d)
6.0 ohms
30.
The power rating of a bulb is 100 W and the bulb is connected to 30 V. What is the current moving through the bulb?
a)
70 A
b)
0.3 A
c)
3000 A
d)
3 A
31.
The power rating of a bulb is 32 W and the bulb is connected to 12 V. What is the current moving through the bulb?
a)
0.38 A
b)
2.7 A
c)
380 A
d)
20 A
32.
What is the current leaving the battery?
a)
3 A
b)
0.67 A
c)
1.5 A
d)
2 A
33.
A single 14 V battery is connected in series with two identical 10. ohm resistors. What is the current moving through the first resistor?
a)
0.70 A
b)
1.4 A
c)
2.8 A
d)
140 A
34.
A single 18 V battery is connected in series with two identical 12 ohm resistors. What is the current moving through the first resistor?
a)
3.0 A
b)
0.75 A
c)
0.67 A
d)
1.5 A
35.
The current supplied by a battery is 0.350 amps. What is the potential difference across a 15.0 ohm resistor?
a)
5.25 V
b)
43.0 V
c)
0.0200 V
d)
0.190 V
36.
The current supplied by a battery is 0.22 amps. What is the potential difference across a 25 ohm resistor?
a)
5.5 V
b)
110 V
c)
0.0088 V
d)
0.04 V
37.
A voltmeter has________resistance.
a)
high
b)
low
c)
no
38.
A voltmeter is connected in a _________.
a)
series
b)
parallel
39.
An ammeter has ________ resistance.
a)
low
b)
high
c)
no
40.
An ammeter is connected in a ___________.
a)
parallel
b)
series
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