Physics Test - ...

A dynamo is a device which_________.

In an \(L-C\) circuit \(L=3.3 {~H}\) and \({C}=840 {~pF}\) and charge on the capacitor is \(105 \mu {C}\) at \(t=2.0 {~ms}\). Calculate total energy in the circuit.

The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by a dielectric material, the electric field intensity:

Diagram shows a bar magnet and two infinite long wires W₁ and W₂ carrying equal currents in opposite directions. The magnet is free to move and rotate. P is the mid-point of magnet. For this situation mark out the correct statement(s).

For a satellite revolving in a circular orbit around the earth, the physical quantity that remains constant is its ________.

A resistance and \(r\) coil are connected in series with an A.C. sourer voltage \(20~ V\). If the potential difference across resistance is \(12~ V\). Then what will be potential difference across the coil:

When $100 V$ DC is applied across a solenoid, a current of $1 A$ flows in it. When $100 V$ AC is applied across the same coil, the current drops to $0.5 A$. If the frequency of the AC source is $50 Hz$, the resistance and inductance of the solenoid respectively are:

The heat can be transferred by:

Find the rms speed of Nitrogen molecules in a gas at \(300\mathrm{~K}\):

Two waves of wavelength \(2 \mathrm{~m}\) and \(2.02 \mathrm{~m}\) respectively moving with the same velocity superimpose to produce 2 beats per sec. The velocity of the wave is: