Current Electricity

Question: If a 30 V, 90 W bulb is to be worked on a 120 V line, a resistance of how many ohms should be connected in series with the bulb

1) 10 ohm

2) 20 ohm

3) 30 ohm

4) 40 ohm

Solution:

Explanation: No Explanation

Heating Effect of Current Electric Power

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