arwa and physics

Assertion in bohr model of hydrogen atom the angular momentum of an electron in the nth orbit is

Assertion in a semiconductor diode the thickness of depletion layer is not fixed

When the resistance between p and n regions is very high then the p-n junction diode acts as

Atomic spectral emission lines of hydrogen atom are incident on a zinc surface. The lines which can

The energy of an electron in a hydrogen atom in ground state is - 13.6 eV Its energy in an orbit

A tub is filled with a transparent liquid to a height of 30.0 cm the apparent depth of a coin lying

Which one of the following statements is correct electric field due to static charges isconservative

A transformer is connected to a 200 V AC source. The transformer supplies 3000 V to a device. If the

The alternating current I in an inductor is observed to vary with the time t as shown in the graph

In the figure X is a coil wound over a hollow wooden pipe a permanent magnet is pushed at a constant

The magnetic field due to a small magnetic dipole of dipole moment M at a distance r from centre

A 1 cm straight segment of a conductor carrying 1A current in x-direction lies symmetrically at

a student has three resistors each of resistance R to obtain a resistance of 2/3R she should connect

Two charges -q each are placed at the vertices A and B of an equilateral triangle ABC if M is the

The threshold voltage of a silicon diode is 0.7 V It is operated at this point by connecting the

A light of wavelength 400nm is incident on a metal surface whose work function is 3.0 × 10 −19 J

Two concave lenses A and B are arranged coaxially 16 cm apart as shown in figure an object P is

Fringe shift when dielectric slab introduce in path 1 in young double slit experiment

In a double slit experiment 6th dark fringe is observed at a certain point of the screen transparent

Fringe shift when dielectric slab introduce in path 2 in young double slit experiment

In the circuit three ideal cells of emf V and V and 2V are connected to a resistor of resistance R

Two wires of the same material and the same radius have their lengths in the ratio 2:3 they are

The momentum of a photon is 5.0 × 10−29 kg m/s. Ignoring relativistic effects the wavelength

When a photon of suitable frequency is incident on a metal surface a photoelectron is emitted from

Three parallel plates are placed obove each other with equal displacement d between

Charge distribution on parallel plates capacitor

In the above figure P and Q are the two parallel plates of a capacitor plate Q is at positive

A constant electric field is to be maintained between the two plates of a capacitor whose separation

The electric field between the plates of a parallel plate capacitor is E now separation

The frequency of a photon of energy 1.326ev is