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What is the primary function of a transformer? (2021)

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Question: What is the primary function of a transformer? (2021)

Options:

  1. To convert AC to DC
  2. To increase or decrease voltage
  3. To store electrical energy
  4. To measure current

Correct Answer: To increase or decrease voltage

Exam Year: 2021

Solution: 

A transformer is used to increase or decrease the voltage in an AC circuit while keeping the power constant.

What is the primary function of a transformer? (2021)

Practice Questions

Q1
What is the primary function of a transformer? (2021)
  1. To convert AC to DC
  2. To increase or decrease voltage
  3. To store electrical energy
  4. To measure current

Questions & Step-by-Step Solutions

What is the primary function of a transformer? (2021)
  • Step 1: Understand that a transformer is an electrical device.
  • Step 2: Know that it works with alternating current (AC) electricity.
  • Step 3: Learn that the main job of a transformer is to change voltage levels.
  • Step 4: Recognize that it can either increase (step-up) or decrease (step-down) the voltage.
  • Step 5: Remember that while the voltage changes, the total power (which is voltage times current) stays the same.
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