HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Physics

Using Ampere's law, obtain an expression for the magnetic induction near a current-carrying straight infinitely long wire. 

Describe the construction and working of a transformer with a neat labelled diagram.

In a series LCR circuit, the phase difference between the voltage and the current is 45°. Then the power factor will be ______.

State any two characteristics of a series LCR AC resonance circuit.

Find the current in a circuit consisting of a coil and a capacitor in series with an A.C source of 110V (r.m.s.), 60Hz. The inductance of a coil is 0.80 H and its resistance is 50Ω. The capacitance of a capacitor is 8µF. 

A radio can tune over the frequency range of a portion of the MW broadcast band (800kHz -1200kHz). If its LC circuit has an effective inductance of 200mH, what must be the range of its variable condenser? 

If the frequency of incident light falling on a photosensitive material is doubled, then the kinetic energy of the emitted photoelectron will be ______.

Which one of the following particles cannot be accelerated by a cyclotron?

(A) Electrons

(B) Protons

(C) Deuterons

(D) α- particles

State Ampere’s circuital law.

Obtain an expression for magnetic induction along the axis of the toroid.

State the importance of Davisson and Germer experiment.

The de Broglie wavelengths associated with an electron and a proton are the same. What will be the ratio of

1. their momenta
2. their kinetic energies?

Draw a neat labelled diagram of a schematic of the experimental setup for the photoelectric effect. 

With the help of a circuit diagram describing an experiment to study the photoelectric effect.

The energy of a photon is 2 eV. Find its frequency and wavelength.  

The work function of a surface is 3.1 eV. A photon of frequency 1 × 10¹⁵ Hz. Is an incident on it. Calculate the incident wavelength is photoelectric emission occurs or not.   

An iron rod of the area of cross-section 0.1m² is subjected to a magnetizing field of 1000 A/m. Calculate the magnetic permeability of the iron rod. [Magnetic susceptibility of iron = 59.9, magnetic permeability of vacuum = 4π x 10^-7 S. I. unit]  

State the law of radioactive decay.

What happens to a ferromagnetic substance heated above Curie temperature?

A magnet of magnetic moment 3Am² weighs 75 g. The density of the material of the magnet is 7500 kg/m³. what is magnetization?