

Transformers and Power Concepts
Interactive Video
•
Physics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of a step-up transformer?
To decrease the potential difference
To store electrical energy
To increase the potential difference
To convert AC to DC
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a transformer has 200 turns in the primary coil and 50 turns in the secondary coil, what type of transformer is it?
Step-up transformer
Step-down transformer
Isolation transformer
Auto transformer
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which equation is used to calculate the potential difference in the secondary coil of a transformer?
E = mc^2
V1/V2 = N1/N2
V1*I1 = V2*I2
P = IV
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a 100% efficient transformer, what is conserved between the primary and secondary coils?
Current
Voltage
Power
Resistance
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is power calculated in a transformer?
By multiplying voltage and resistance
By dividing voltage by current
By multiplying voltage and current
By adding voltage and current
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is high voltage used in power transmission?
To reduce power wastage as heat
To decrease the voltage
To increase the current
To make the cables lighter
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the potential difference when electricity is passed through a step-up transformer?
It decreases
It remains the same
It increases
It fluctuates
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