An alternating voltage $\mathrm{V}=100 \sqrt{2} \sin (50 \mathrm{t})$ is connected to $2 \mu \mathrm{~F}$ capacitor through a.c. ammeter. The reading of the ammeter is
20 mA
2 mA
10 mA
0.2 mA
A gas at $800^{\circ} \mathrm{C}$ is cooled until both its pressure and volume are halved. The final temperature of the gas will be
473 K
373.25 K
293.29 K
268.25 K
When the r.m.s. velocity of a gas is denoted by ' V ' and temperature of the gas by T , which of the following relations is TRUE?
$\mathrm{VT}^2=$ constant
$\frac{\mathrm{V}}{\mathrm{T}^2}=$ constant
$\frac{\mathrm{V}^2}{\mathrm{~T}}=$ constant
$\mathrm{V}^2 \cdot \mathrm{~T}=$ constant
An inductor of 0.5 mH , capacitor of $20 \mu \mathrm{~F}$ and resistance of $20 \Omega$ are connected in series with a 220 V a.c. source. If the current is in phase with e.m.f., the maximum current in the circuit is $\sqrt{x} A$. The value of $x$ is
2
121
242
11
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