An AC voltage of V-220sqrt -2-sin - left- 100pi t-dfrac - pi - 2 - right- - is applied across a DC voltmeter- its reading will be-220sqrt -2- vsqrt -2- v220 vzero

Question

An AC voltage of  V-220sqrt -2-sin - left- 100pi t-dfrac - pi - 2 - right- - is applied across a DC voltmeter- its reading will be-220sqrt -2- vsqrt -2- v220 vzero

Toppr Admin · Accepted Answer

A DC Voltmeter measures only average value- Incase of AC average voltage will be zero- Hence DC voltmeter reads zero Volt

An $A C$ voltage of $V = 220 \sqrt{2} sin (100 π t + \frac{π}{2})$ is applied across a $D C$ voltmeter, its reading will be:
$220 \sqrt{2} v$
$\sqrt{2} v$
$220 v$
$z e r o$

A DC Voltmeter measures only average value. Incase of AC average voltage will be zero. Hence DC voltmeter reads zero Volt

An AC voltage of V=220√2sin(100πt+π2) is applied across a DC voltmeter, its reading will be:220√2 v√2 v220 vzero

A DC Voltmeter measures only average value. Incase of AC average voltage will be zero. Hence DC voltmeter reads zero Volt

An $A C$ voltage of $V = 220 \sqrt{2} sin (100 π t + \frac{π}{2})$ is applied across a $D C$ voltmeter, its reading will be:
$220 \sqrt{2} v$
$\sqrt{2} v$
$220 v$
$z e r o$