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JEE Main · 2020 · 07 Jan 2020 · Shift 2 · Current Electricity

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In a building there are 15 bulbs of , 15 bulbs of , 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the building will be
  1. (A)10 A
  2. (B)20 A✓ Correct
  3. (C)25 A
  4. (D)15 A

Answer: (B)

Solution

Add up the power the building draws: W. At V the mains current is A, so the fuse must be rated just above this, which makes A the smallest suitable rating.

JEE Main · 2020 · 07 Jan 2020 · Shift 2 · Single correct option

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