Question

When a high power heater is connected across means, the light of the bulbs glowing in a house becomes dim why ?​

Answer 1

Answer:

The electiric heater have more power and less resistance than electric bulb. So electric heater when put in parallel circuit of glowing electric bulb, it draws higher current. Some current from the bulb is diverted into heater. Due to it, bulb becomes dim.

Explanation:

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Answer 2

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When more current flows through the heater, there is a considerable potential drop across the wires coming from the mains. Thus, the intensity of glow of the bulbs decreases.