MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

The reactance of the coil is 20 `Omega` and its resistance is 20 `Omega`. It is connected to an A.C. source of e.m.f. 220 V. The peak value of the current in the circuit is ____________.

The acceleration of electron in the first orbit of hydrogen atom is ______.

A potentiometer wire of Length 10 m is connected in series with a battery. The e.m.f. of a cell balances against 250 cm Length of wire. If length of potentiometer wire is increased by 1 m, the new balancing length of wire will be ____________.

In a series L.C.R. circuit, the potential drop across L, C and R respectively are 60 V, 140 V and 60 V. Then the source voltage is ____________.

If the e.m.f of a cell is not constant in the metre bridge experiment, then the ____________.

The time of revolution of an electron around a nucleus of charge Ze in n^th Bohr orbit is directly proportional to ____________.

The phase difference between the instantaneous velocity and acceleration of a particle executing S.H.M is ____________.

Which of the following is true for a potentiometer?

When an electron in hydrogen atom is excited from its 3^rd to 5^th stationary orbit, tbe change in angular momentum of electron is (Planck's constant: h = 6.62 x 10-³⁴ Js) ____________.

In photoelectric effect, graph of saturation current versus frequency of light is plotted. The nature of the graph will be ____________.

If 'α' and 'β' are the maximum velocity and maximum acceleration respectively, of a particle performing linear simple harmonic motion, then the path length of the particle is _______.

The two waves are represented by Y₁ = `10-2 sin [50"t" + x/25 + 0.3]`m and Y₂ = `10^-2 cos [50"t" + x/25]`m where x is in metre and time in second. The phase difference between the two waves is nearly _________.

To determine the internal resistance of a cell by using potentiometer, the null point is at 1 m when cell is shunted by 3 Ω resistance and at a length 1.5 m when cell is shunted by 6 Ω resistance. The internal resistance of the cell is ______.

A cell of e.m.f. 'E' is connected across a resistance 'R'. The potential difference across the terminals of the cell is 90% ofE. The internal resistance of the cell is ______.

Sensitivity of a given potentiometer can be decreased by ______.

The susceptibility of a magnetic material is positive and small. The material is ______.

The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be ______.

All atoms of a magnetic substance have a resultant magnetic moment even in absence of external magnetic field. The substance is ______.

Magnetization of the sample is ______.

A potentiometer wire of length 100 cm has a resistance of 10 `Omega.` It is connected in series with a resistance and an accumulator of e.m.f 2 V and of negligible internal resistance. A source of e.m.f 10 mV is balanced against a 40 cm length of the potentiometer wire. The value of the external resistance is ____________.