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

A particle executing S.H.M. has amplitude 0.01 m and frequency 60 Hz. The maximum acceleration of the particle is ____________.

A small signal voltage V(t) = V₀ sin`omega`t is applied across an ideal capacitor C ____________.

Following graphs show the variation of stopping potential corresponding to the frequency of incident radiation (F) for a given metal. The correct variation is shown in graph (v₀ = Threshold frequency).

The length of a wire of a potentiometer is 100 cm, and the e.m.f of its standard cell is E volt. It is employed to measure the e.m.f of a battery whose internal resistance is 0.5 `Omega` If the balance point is obtained at `l`= 30 cm from the positive end, the e.m.f of the battery is ____________.

where 'i' is the current in the potentiometer

The minimum energy required to excite a hydrogen atom from its ground state is ____________.

The lowest frequency of light that will cause the emission of photoelectrons from the surface of a metal (for which work function is 1.65 eV) will be ____________.

In a circuit L, C and R are connected in series with an alternating voltage source of f. When current in the circuit leads the voltage by 45°, the value of C ____________.

Relative permittivity and permeability of a material are  `epsilon_"r"` and `µ_"r"` respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

A sonometer wire resonates with a given tuning fork forming standing wave with 5 antinodes between two bridges when mass of 9 kg is suspended from the wire. When mass 'M' is suspended from the wire, with same fork and same length between two bridges 3 antinodes are formed. Mass M is ______.

In Bohr's model of hydrogen atom, which of the following pairs of quantities are quantized?

The photon of frequency vis incident on a metal surface whose threshold frequency is v₀. The kinetic energy of the emitted photoelectrons will be ______.

The reactance of a circuit is zero. It is possible that the circuit contains ______.

If a charge on the body is 1 nC, then how many electrons are present on the body?

A potentiometer wire is 10 m long and has resistance of 2`Omega`/m. It is connected in series with a battery of e.m.f 3 V and a resistance of 10 `Omega`. The potential gradient along the wire in V/m is ______.

A body of mass 5 g is in S.H.M. about a point with amplitude 10 cm. Its maximum velocity is 100 cm/s. Its velocity will be 50 cm/s at a distance of, ____________.

When two cells of e.m.f 1.5 V and 1.1 V connected in series are balanced on a potentiometer, the balancing length is 260 cm. The balancing length, when they are connected in opposition is (in cm) ____________.

The work function of a photosensitive material is 4.0 eV. The longest wavelength of light that can cause photon emission from the substance is (approximately) ____________.

The capacity of pure capacitor is 1 farad. What will be its effective resistance in D.C. circuit?

The amplitude of a wave represented by equation `"y" = 1/(sqrt"a")  "sin"  omega"t" pm 1/(sqrt"b") "cos"  omega"t"` will be ____________.

Which one of the following statements ts INCORRECT for stopping potential in photoelectric emission?