HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

A string of length 0.5 m carries a bob of mass 0.1 kg at its end. If this is to be used as a conical pendulum of period 0.4 π sec, the angle of inclination of the string with the vertical is ______. (g = 10m/s²)

When a sphere rolls without slipping, the ratio of its kinetic energy of translation to its total kinetic energy is ______.

The figure shows part of an electric circuit. The potential difference V_A - V_B is ______. 

For a charged cylindrical conductor of cross-sectional radius R, what is the relation between the surface charge density and linear charge density?

Write about the kinetic friction between the road and the tyres.

A 25 watt lamp is connected to a.c. potential of peak value 100 V. Calculate the rms value of the current.

What is a ripple?

The radius of curvature of road is 60 m. If angle of banking is 27°, find maximum speed with which vehicle can tum along this curve. . (g = 9.8 m/s²)

A photodiode is used in ______.

A body performing uniform circular motion has ______.

A circular loop is placed in a uniform magnetic field. The total number of magnetic field lines passing normally through the plane of the coil is called ______.

Why does a motorcyclist moving along a level curve at high speed have to lean more than a cyclist moving along the same curve at low speed?

A disc of mass 4 kg rolls on a horizontal surface. If its linear speed is 3 m/ s, what is its total kinetic energy?

Draw a neat labelled diagram of photo-current as a function of accelerating potential for fixed incident intensity but different incident frequencies for the same emitter material.

What is Gauss's law?

What is a Gaussian surface?

The electron in the hydrogen atom is moving with a speed at 2.3 x 10⁶ m/s in an orbit of radius 0.53Å. Calculate the magnetic moment of the revolving electron.

The threshold frequency for a certain metal for photoelectric effect is 1.7 x 10¹⁵ Hz. When a light of frequency 2.2 x 10¹⁵ Hz is incident on the metal surface, the kinetic energy of the emitted photoelectrons is 3.3 x.10^-19 J. Calculate Planck's constant.

Write a short note on Full wave rectifier.

Explain the formation of clouds at high altitude.