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Byju's Answer

Standard XII

Physics

EMF and EMF Devices

A battery, an...

Question

A battery, an open switch and a resistor are connected in series as shown in figure. 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 given is/are true?

Only (i)

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Only (iii)

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Only (i) and (iii)

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(i), (ii) and (iii)

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Solution

The correct option is B Only (iii)
We know,

Connecting wires offer zero resistance,

Hence potential at $Q$ and at $T$ are same.i.e $V_{Q} = V_{T}$

Potential difference along $Q T$ will be read zero by voltmeter.

And potential along $P T$ will be $V$
Where $V$ voltage of battery.

Option $B$ is the correct answer

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A battery, an open switch and a resistor are connected in series as shown in figure. 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 TWhich one of the given is/are true?

The correct option is B Only (iii)We know,Connecting wires offer zero resistance,Hence potential at Q and at T are same.i.e VQ=VTPotential difference along QT will be read zero by voltmeter.And potential along PT will be V Where V voltage of battery.Option B is the correct answer

A battery, an open switch and a resistor are connected in series as shown in figure. 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 given is/are true?