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WorksheetsVRQ3 Introduction to Transformers
Total questions: 11
Worksheet time: 6mins
What is the primary function of a transformer?
Convert AC voltage to DC voltage
Change AC voltage to a higher or lower AC voltage
Store electrical energy
Generate electricity
Which of the following is not a function of a transformer?
Changing AC voltage levels
Converting AC to DC
Operating on magnetic induction
Working with AC voltages
Where is the load connected in a transformer?
Secondary coil
Primary coil
Iron core
AC supply
What is the effect of mutual inductance on the second coil when the current in the first coil changes?
It remains unaffected
It induces a current in the second coil
It decreases the resistance in the second coil
It increases the temperature of the second coil
What is the primary function of the transformer core?
To conduct electricity
To store energy
To contain magnetic flux
To increase voltage
What is the relationship between magnetic flux and voltage in a transformer?
Inversely proportional
Directly proportional
No relationship
Exponentially proportional
What does Vs stand for in the context of the formula?
A) Primary voltage in V
B) Secondary voltage in V
C) Primary coil turns
D) Secondary coil turns
How does the number of turns in a coil affect the voltage according to the formula?
A) More turns increase voltage
B) More turns decrease voltage
C) Turns have no effect on voltage
D) Turns inversely affect voltage
What is the effect on the output voltage if the secondary coil has fewer turns than the primary coil?
The output voltage is less than the input voltage
The output voltage is equal to the input voltage
The output voltage is more than the input voltage
The output voltage is double the input voltage
What is the purpose of a step-up transformer?
To increase the output voltage
To decrease the output voltage
To maintain the same voltage
To convert AC to DC
What is the formula to calculate the secondary voltage (Vs) from the primary voltage (Vp) and turns ratio (n)?
Vs = Vp × n
Vs = Vp/n
Vs = Vp + n
Vs = Vp - n
