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

A donor impurity results in ______.

A potentiometer wire of length 100 cm and resistance 3 `Omega` is connected in series with resistance of 8 `Omega` and an accumulator of 4 volt whose internal resistance is 1 `Omega`.

A horizontal spring executes S.H.M. with amplitude 'A₁', when mass 'm₁' is attached to it, When it passes through mean position another mass 'm₂' is placed on it. Both masses move together with amplitude 'A₂'. Therefore A₂ : A₁ is ______ 

A mass M attached to a horizontal spring executes S.H.M. of amplitude A₁. When the mass M passes through its mean position, then a smaller mass m is placed over it and both of them move together with amplitude A₂. The ratio of `(A_1/A_2)` is ______ 

An electron accelerated through potential difference 'V' passes through a uniform transverse magnetic field and experiences a force 'F'. If the accelerating potential in increased to '2V', the electron in the same magnetic field will experience a force ____________.

In Melde's experiment, when the wire is stretched by an empty pan, four loops are obtained and when a six-gram weight is added to the pan, the number of loops becomes one. The mass of pan is ______

The correct statement about stationary waves is that ______

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 ______