1.

What will be the voltmeted ofresistance 250 ohm when it is connected across a cell of emf 2 V and inteonal resistance 12 ohm​

Answer»

Answer:

Given: 

R = 100 Ω, 

r = 20 Ω, 

E = 2 V 

To FIND: READING of voltmeter (V) 

Formula: V = E - IR 

Calculation: CURRENT through the circuit is given by 

I=R+rE=100+202=1202

I=601A

From formula, 

V=2−(601×20)=2−0.3333 

∴ V = 1.667 V 

The reading on the voltmeter is 1.667 V 



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