Question

A battery, an open switch and a resistor are connected in series as shown below. Consider the following three statements concerning the circuit. A voltmeter will read zero if it is connected across points

(i) P and T (ii) P and Q

(iii) Q and T

Which one of the above is/are true?

• A. Only (i)
• B. Only (iii)
• C. Only (i) and (iii)
• D. (i), (ii) and (iii)

Answer 1

Answer: (C)

Only (i) and (iii)

Answer 2

: when the switch is not not closed, a voltmeter connected across P and T will not show any potential difference. Between Q and T also there is no potential difference because circuit is not complete. Therefore in both the cases, the voltmeter will read zero. Between P and Q, the emf of the battery will be given.