Name: __________________________________
Date: ______________
Physics I
Mr. Tiesler
Transformer Worksheet
Solutions to Physics I Transformer Worksheet
1.) Fill in the table below for the transformer shown above.
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Primary
Secondary
Voltage
120 V
2400 V
Current
20 A
1A
# of Coils
30
600
2400 W
2400 W
Power
2.) Is this a step up or step down transformer?
Step Up
3.) A transformer has a primary coil with 200 turns, and a secondary coil with 2000 turns. The
input voltage is 120 V, and it runs at 1800 W. Fill in the table below for this transformer.
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Primary
Secondary
Voltage
120 V
1200 V
Current
15 A
1.5 A
# of Coils
200
2000
1800 W
1800 W
Power
4.) Is this a step up or step down transformer?
Step Up
5.) A transformer has a primary coil with 100 turns and 35 A, and the secondary coil has 150
turns. The power in the secondary coil is 1.4 kW. Fill in the table below for this transformer.
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Primary
Secondary
Voltage
40 V
60 V
Current
35 A
23 A
# of Coils
100
150
1.4 kW
1.4 kW
Power
6.) Is this a step up or step down transformer?
Step Up
7.) A transformer has an output voltage of 40 V and an output current of 5 A. The input current
is 0.25 A and the primary coil has 50 turns. Fill in the table below for this transformer.
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Primary
Secondary
Voltage
800 V
40 V
Current
0.25 A
5A
# of Coils
50
2.5
200 W
200 W
Power
8.) Is this a step up or step down transformer?
Step Down
9.) 180 V goes into 300 coils. 270 V comes out of the transformer. The power is 7.2 kW. Fill in
the table below for this transformer.
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Primary
Secondary
Voltage
180 V
270 V
Current
40 A
27 A
# of Coils
300
450
Power
7.2 kW
7.2 kW
10.) Is this a step up or step down transformer?
Step Up