Physics Test - ...

A 220 V, 100 W bulb is connected to a 110 V source. Calculate the power consumed by the bulb.

Which among the following is the incorrect statement regarding displacement current?

A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 μC/m². What is the total electric flux leaving the surface of the sphere?

A short bar magnet placed with its axis at \(30°\) with an external field of \(800\) G experiences a torque of \(0.016\) Nm. What is the magnetic moment of the magnet ?

What is the value of instantaneous displacement current in the free space between parallel plate capacitor of capacitance \(1 \mu F\) and the rate of changing potential difference maintain between plates is \(10^{6} {~V} / {s} ?\)

Two photons of same frequency are produced due to the annhiliation of a proton and antiproton. Wave length of the proton so produced is:

What is the ratio of the wavelength of photon released when the electron jumps from 5th to 4th orbit of a hydrogen atom and then from 4th to the ground state?

How is the resistance of semiconductor classified?

What is the magnitude of emf induced in a \(200\) turn coil with cross-sectional area of \(0.16\) m^\(2\), if the magnetic field through the coil changes from \(0.1\) Wb/m^\(2\) to \(0.5\) Wb/m^\(2\) at a uniform rate over a period of \(0.02\) seconds?

A converging lens is required to be formed of 10 cm focal length using two lenses. One of the lens is diverging lens with focal length - 20 cm. Find the power of another lens.