VRQ3 Introduction to Transformers
Authored by Gareth Williams
Engineering
12th Grade
Used 3+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where is the load connected in a transformer?
Secondary coil
Primary coil
Iron core
AC supply
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of the transformer core?
To conduct electricity
To store energy
To contain magnetic flux
To increase voltage
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between magnetic flux and voltage in a transformer?
Inversely proportional
Directly proportional
No relationship
Exponentially proportional
Answer explanation
In a transformer, the relationship between magnetic flux and voltage is governed by Faraday's Law of Electromagnetic Induction.
Faraday's Law states that the induced voltage in a coil is directly proportional to the rate of change of magnetic flux through the coil. Mathematically, it can be expressed as:
V=N (dΦ/dt)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
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