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Fields and their consequences (A-level only)

Fields and their consequences (A-level only)

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Question 158

A step-down transformer has a primary coil of 1200 turns and a secondary coil of 150 turns. The primary coil is connected to an alternating current (a.c.) mains supply with a root-mean-square (r.m.s.) voltage of 240 V. The secondary coil is connected to a heating element of resistance 15 Ω.

Assuming the transformer is 100% efficient, what is the peak power dissipated in the heating element?

A

30 W30\text{ W}30 W

B

60 W60\text{ W}60 W

C

120 W120\text{ W}120 W

D

240 W240\text{ W}240 W

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Fields and their consequences (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Fields and their consequences (A-level only)

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