The average power dissipation in a pure capacitance in ac circuit… - Vidyadip

MCQ

The average power dissipation in a pure capacitance in ac circuit is

A
$\frac{1}{2}C{V^2}$
B
$C{V^2}$
C
$\frac{1}{4}C{V^2}$
✓
Zero

✓

Answer

Correct option: D.

Zero

d
(d) Average power in ac circuits is given by $P = {V_{rms}}{i_{rms}}\cos \phi $
For pure capacitive circuit $\phi = {90^o}$ so $P = 0$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 7. Alternating current→7. Alternating current — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

If $‘N’$ is the number of turns in a coil, the value of self inductance varies as

For a series $LCR$ circuit with ${R}=100\,\ \Omega, {L}=0.5\, {mH}$ and ${C}=0.1\, {pF}$ connected across $220 \,{V}-50\, {Hz}$ $AC$ supply, the phase angle between current and supplied voltage and the nature of the circuit is :

The dipole moment of each molecule of a paramagnetic gas is $1.5 \times 10^{-23} \mathrm{amp} \times \mathrm{m}^2$. The temperature of gas is $27^{\circ} \mathrm{C}$ and the number of molecules per unit volume in it is $2 \times 10^{26} \mathrm{~m}^{-3}$. The maximum possible intensity of magnetisation in the gas will be

Two incident monochromatic waves whose wavelengths differ by a small amount $d\lambda$ are separated angularly at $\theta$ and $\theta + d\theta$ $w.r.t$. the incidence ray. The dispersive power is given by

The electrostatic potential on the surface of a charged conducting sphere is $100 V$ . Two statements are made in this regard $S_1$ at any point inside the sphere, electric intensity is zero. $S_2$ at any point inside the sphere, the electrostatic potential is $100 V$ . Which of the following is a correct statement?

A watch shows time as $3:25$ when seen through a mirror, time appeared will be

If the focal length of a double convex lens for red light is $f_R$, its focal length for the violet light is

A length $L$ of wire carries a steady current $I$. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is

A proton is moving along $Z$-axis in a magnetic field. The magnetic field is along $X$-axis. The proton will experience a force along

The ratio $(R)$ of output resistance $r_0$, and the input resistance $r_i$ in measurements of input and output characteristics of a transistor is typically in the range