111)
E=V-ir...'V', i are known, figure out 'r'....
Pls correct if wrong.
Ques1) The above figure shows an arrangement to measure the emf and internal resistance of the battery. Suppose the voltmeter reads 1.52 v when the switch S is open. When the switch is closed the voltmeter reading drops to 1.45 V and the ammeter reads 1.0 A. Find the emf and internal resistance of the battery.
Ques2) When is the rate at which energy is being delivered to a ligh bulb higher - just after it is turned on, and the glow of the filament is increasing, or after it has been for a few seconds and the glow is steady?
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