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 above is/are true ?
Updated On: Jun 23, 2023
only (i)
only (iii)
only (i) and (iii)
(i), (ii) and (iii)
Hide Solution
Verified By Collegedunia
The Correct Option isC
Solution and Explanation
When the switch is 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.
The current electricity whose direction remains the same is known as direct current. Direct current is defined by the constant flow of electrons from a region of high electron density to a region of low electron density. DC is used in many household appliances and applications that involve a battery.
Alternating Current
The current electricity that is bidirectional and keeps changing the direction of the charge flow is known as alternating current. The bi-directionality is caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back-and-forth motion for the current. The electrical outlets at our homes and industries are supplied with alternating current.
