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Figure (32-E2) shows an arrangement to …

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Figure (32-E2) shows an arrangement to measure the enmf E and internal resistance r of a battery.The voltmeter has a very high resistance and the ammeter also has some resistance.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 the internal resistance of the battery.

Posted by Karan Barmase 6 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Srishti Choudhary ✍⏳ 6 years, 8 months ago

Yes btao plzz

Swati Singh 6 years, 8 months ago

Tell me one thing,how do u able attach these photos in yr ans??????

Gaurav Seth 6 years, 8 months ago

a) When switch is open, no current passes through the ammeter. In the upper part of the circuit the Voltmenter has ∞ resistance. Thus current in it is 0.

Voltmeter read the emf. (There is not Pot. Drop across the resistor).

b) When switch is closed current passes through the circuit and if its value of i.

The voltmeter reads

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