Q137 / 270 · NDA 2019 (Phase 2) · General Ability

Water is heated with a coil of resistance R connected to domestic supply. The rise of temperature of water will depend on 1. Supply voltage 2. Current passing through the coil. 3. Time for which voltage is supplied. Select the correct answer from among the following:

  • Correct answer
    A
    1,2 and 3
  • B
    1 and 2 only
  • C
    1 only
  • D
    2 and 3 only

Solution

The heating effect generated inside a conductor depends upon the resistance of the conductor, the time, $t$ for which current flows and the current itself.

Hence, the correct answer is option: 'A'.

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