Question

A cell of emf $90\, V$ is connected across series combination of two resistors each of $100\, \Omega$ resistance A voltmeter of resistance $400\, \Omega$ is used to measure the potential difference across each resistor The reading of the voltmeter will be :

• A. $45 \, V$
• B. $40 \, V$
• C. $80 \, V$
• D. $90\, V$

Answer 1

Answer: (B)

$40 \, V$

Answer 2

The correct answer is (B) : 40 V

Req ​=500400×100​+100
=180Ω
i=18090​=21​A
Reading =21​×500400​×100
=40 volt