Physics Test-36...

A series \(LCR\) circuit with \(R =20 \Omega, L =1.5 H\) and \(C =35 \mu F\) is connected to a variable-frequency \(200 V\) ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

A circular coil A of radius ‘a’ carries current ‘I’. Another circular coil B of radius ‘2a’ also carries the same current of ‘I’. The magnetic fields at the centers of the circular coils are in the ratio of:

What amount of heat must be supplied to \(2.0 \times 10^{-2} kg\) of Nitrogen (at room temperature) to raise its temperature by \(45^{\circ} C\) at constant pressure? (Molecular mass of \(\left.N_{2}=28 ; R=8.3 J m o l^{-1} K^{-1} .\right)\)

Hydrogen bomb is based on

The prefix "nano" comes from a:

The time period of a simple pendulum is \(T\). When the length is increased by \(10 \mathrm{~cm}\), its period is \(T_{1}\). When the length is decreased by \(10 \mathrm{~cm}\), its period is \(T_{2}\). Then, relation between \(\mathrm{T}, \mathrm{T}_{1}\) and \( \mathrm{~T}_{2}\) is:

The escape velocity on earth is 11.2 km/s. Find the escape velocity on a planet having mass twice that of earth and radius half that of the earth.

X-rays are different from UV light because it has different __________ from UV light.

The SI Unit of Charge is:

It is observed in a potentiometer experiment that no current passes through the galvanometer, when the terminals of the cell are connected across a certain length of the potentiometer wire. On shunting the cell by a \(2 \Omega\) resistance, the balancing length is reduced to half. The internal resistance of the cell is: