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Fields and their consequences (A-level only)

Fields and their consequences (A-level only)

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Question 5

A step-up transformer in a microwave oven is connected to a 230 V ac mains supply. The transformer has an efficiency of 88% and delivers a current of 0.450 A at a secondary potential difference of 2.10 kV2.10\text{ kV}2.10 kV to the magnetron.

What is the current in the primary winding of the transformer under these operating conditions?

A

0.056 A0.056\text{ A}0.056 A

B

3.62 A3.62\text{ A}3.62 A

C

4.11 A4.11\text{ A}4.11 A

D

4.67 A4.67\text{ A}4.67 A

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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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