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

The area of a coil is 'A'. The coil is placed in a magnetic field which changes from 'B₀' to 4B₀' in time 't'. The magnitude of induced e.m.f. in the coil will be ____________.

In a stationary wave all particles ______ 

Let v₁ and v₃ be the frequency for series limit of Balmer and Paschen series respectively. If the frequency of first line of Balmer series is v₂ then, relation between v₁ and v₂ and v₃ is ____________.

In hydrogen atom, the product of the angular momentum and the linear momentum of the electron is proportional to (n = principal quantum number) ____________.

In hydrogen spectrum, which of the following spectral series lies in ultraviolet region?

The radii of the first four Bohr orbits of hydrogen atom are related as ____________.

In hydrogen spectrum, the series of lines obtained in the ultraviolet region of the spectrum is ____________.

In the potentiometer experiment, the balancing length with cell E₁ of unknown e.m.f. is ℓ₁ cm. By shunting the cell E₁ with resistance 'R' which is equal to internal resistance (r) of the cell E₁, the balancing length ℓ₂ is ______

A potentiometer is used to measure the potential difference between A and B, the null point is obtained at 0.9 m. Now the potential difference between A and C is measured, the null point is obtained at 0.3 m. The ratio `E_2/E_1` is (E₁ > E₂) ______

The current drawn from the battery in the given network is ______ 

(Internal resistance of the battery is neglected)

A wire has a length of 2m and a resistance of 10Ω. It is connected in series with a resistance of 990Ω and a cell of e.m.f. 2V. The potential gradient along the wire will be ______

In the experiment to determine the internal resistance of a cell (E₁) using a potentiometer, the resistance drawn from the resistance box is 'R'. The potential difference across the balancing length of the wire is equal to the terminal potential difference (V) of the cell. The value of internal resistance (r) of the cell is ______

A potentiometer wire has a length of 4m and resistance of 5Ω. It is connected in series with 495 Ω resistance and a cell of e.m.f. 4V. The potential gradient along the wire is ______

Magnetic force on a closed current-carrying circuit placed in a uniform magnetic field is ______.

Semiconductors formed by doping germanium (Ge) with aluminium (Z = 13) and antimony (Z = 51) are ______.

If the length of potentiometer wire is increased, then the length of the previously obtained balance point will ______.

If the mass of the electron is reduced to half, the Rydberg constant ______.

In hydrogen spectrum, the wavelengths of light emitted in a series of spectral lines is given by the equation, `1/lambda` = R `(1/4^2 - 1/"n"^2)`, where n = 5, 6, 7...... and 'R' is Rydberg's constant. Identify the series and wavelength region.

Two students X and Y perform potentiometer experiment separately and null point was obtained as shown in diagram. During the experiment, ______.

1. X increases the value of R (resistance)
2. Y decreases the value of S (resistance)

The position of null point obtained by students X and Y respectively.

A student connected the circuit as shown in the figure to determine the internal resistance of a cell E1 by potentiometer (E > E1). He is unable to obtain the null point because ______.