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Electromagnetic Induction /
2026 /
Quiz 4

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MDCAT Practice Test - Practice Test - Physics - Electromagnetic Induction - 2026 Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Physics - Electromagnetic Induction (Year 2026) | Quiz 4

31. What are the main energy losses in a transformer?

Only copper loss
Only eddy current
Copper, eddy, hysteresis, leakage
Only hysteresis

32. Which material reduces hysteresis loss in transformers?

Hard steel
Soft iron
Air core
Copper core

33. A transformer has 80% efficiency and input 1000 W. What is output power?

800 W
200 W
1000 W
1250 W

34. Which rule is used to find the direction of induced current?

Left-hand rule
Right-hand rule (generator)
Cork screw rule
Ampere's rule

35. A magnet is moved away from a coil. The induced current creates a field that:

Repels the magnet
Attracts the magnet
No effect
Deflects sideways

36. What determines the magnitude of induced emf?

Absolute flux
Rate of change of flux
Coil resistance
Magnet material

37. If magnetic flux changes more rapidly, induced emf is:

Larger
Smaller
Zero
Constant

38. 100-turn coil: flux changes from 0.02 Wb to 0 in 0.05 s. Find induced emf.

20 V
40 V
80 V
100 V

39. What type of current is needed in the primary of a transformer?

Direct current
Alternating current
Pulsating DC
Constant current

40. Mutual inductance M=0.5 H, di/dt=10 A/s. Find induced emf in secondary.

0.5 V
2 V
5 V
10 V

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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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