Magnetic fields (A-level only)

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Question 75
Medium

A transformer has a primary coil of 1500 turns and a secondary coil of 150 turns. The primary coil is connected to an alternating current (a.c.) power supply where the root-mean-square (rms) voltage VrmsV_{\text{rms}}Vrms​ is 120 V. The secondary coil is connected to a resistor of resistance 12 Ω. The transformer is 100% efficient. What is the peak power dissipated in the resistor?

6.0 W6.0\text{ W}6.0 W

12 W12\text{ W}12 W

24 W24\text{ W}24 W

48 W48\text{ W}48 W

Magnetic fields (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Magnetic fields (A-level only)