Math  /  Numbers & Operations

QuestionProblem 3. An electric heater consumes 1.8 MJ when connected to a 250 V supply for 30 minutes. Find the power rating of the heater and the current taken from the supply. Ans. 1kW; 4A.

Studdy Solution
Perform the calculation to find the current.
I=1000250=4 AI = \frac{1000}{250} = 4 \text{ A}
The power rating of the heater is 1 kW 1 \text{ kW} and the current taken from the supply is 4 A 4 \text{ A} .

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