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  • A constant 60 V d.c. supply is connected across two resistors of resistance 400 and 200 <img alt="\mathrm{k \Ome

A constant 60 V d.c. supply is connected across two resistors of resistance 400 \mathrm{k \Omega} and 200 \mathrm{k \Omega}. What is the reading of the voltmeter, also of resistance 200 \mathrm{k \Omega}, when connected across the second resistor as shown in Figure?

Option: 1

12V


Option: 2

15V


Option: 3

20V


Option: 4

30V


Answers (1)

best_answer

Effective resistance across the voltmeter = \frac{200 }{2}=\mathrm{k} \Omega
Total resistance across d.c. supply = 400+100=500 \mathrm{k} \Omega
Thus, the voltage across the voltmeter = \frac{100 }{500}(60 \mathrm{~V})=12 \mathrm{~V}

Posted by

Divya Prakash Singh

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