Question: 1. A heater consists of a variable resistance connected across a constant voltage supply. To increase the heat output, should you decrease the resistance or

1. A heater consists of a variable resistance connected across a constant voltage supply. To increase the heat output, should you decrease the resistance or increase it?

2. A battery with 12-V emf has a terminal voltage of 11.4 V when it delivers a current of 20 A to the starter of a car. What is the internal resistance r of the battery?

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