HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

Determine the binding energy per nucleon of the americium isotope \[\ce{_95^244Am}\], given the mass of \[\ce{_95^244Am}\] to be 244.06428 u.

Answer in one sentence.

State the SI unit and dimensions of stress.

In the law of tension, the fundamental frequency of the vibrating string is, ______   

State law of tension.

State law of linear density.

What is the resonance?

How the frequency of the vibrating wire is affected if the load is fully immersed in water? 

A sonometer wire of length 1 m is stretched by a weight of 10 kg. The fundamental frequency of vibration is 100 Hz. Determine the linear density of the material of the wire.

Waves produced by two vibrators in a medium have wavelength 2 m and 2.1 m respectively. When sounded together they produce 8 beats/second. Calculate wave velocity and frequencies of the vibrators.

State and verify the laws of vibrating strings using a sonometer. 

The magnetic field at the centre of a circular loop of radius 12.3 cm is 6.4 x 10^-6 T. What will be the magnetic moment of the loop? 

A pair of the adjacent coil has a mutual inductance of 1.5 H. If the current in one coil varies from 0 to 20 A in 0.5 s, what is the change of flux linked with the other coil. 

Define Mutual Inductance.

An emf of 91 mV is induced in the windings of a coil when the current in o nearby coil is increasing at the rate of 1.3 A/s. what is the mutual inductance (M) of the two coils in mH?

Compare the rate of loss of heat from a metal sphere at 827°C with the rate of loss of heat from the same at 427°C, if the temperature of the surrounding is 27°C.

Calculate the work done in blowing a soap bubble to a radius of 1 cm. The surface tension of soap solution is 2.5 × 10⁻² N/m.

The mutual inductance of a pair of adjacent coils is 1.5 H. If the current is one coil changes from 5 A to 10 A in 0.1 s, the rate of change of magnet flux linkage is ______.

If T₁, T₂ and T₃ are the forces due to surface tension at the liquid-s solid-gas and liquid-gas interfaces such that T₂ - T₁ ≅ T₃ and the contact angle for the liquid-solid pair is θ then ______.

Draw neat labelled diagrams for the first and second overtones of vibration of an air column in a pipe open at both ends.

A rectangular coil of wire 50 turn each of area 6 x 10^-4 m² is freely suspended in a field of 3 x 10^-2 Wb / m². Calculate the current flowing through the coil when it deflects through 60°, when torsional constant is 3.82 x 10^-6 SI unit.