HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

A voltmeter has a range of 0 - 20 V and a resistance of 500 Q. Explain how can be used to measure voltages from 0 - 200 volt?

Derive an expression for maximum speed moving along a horizontal circular track.

To convert a moving coil galvanometer into an ammeter we need to connect a ______.

In a photoelectric experiment, the stopping potential is 1.5V. What is the maximum kinetic energy of a photoelectron?

A horizontal force of 0.5 N is required to move a metal plate of area 10⁻² m² with a velocity of 3 × 10⁻²m/s, when it rests on 0.5 × 10⁻³ m thick layer of glycerin. Find the coefficient of viscosity of glycerin.

A spherical metal ball of radius 15 cm carries a charge of 2μC. Calculate the electric field at a distance of 20 cm from the center of the sphere.

The radius of a circular track is 200 m. Find the angle of banking of the track, if the maximum speed at which a car can be driven safely along it is 25 m/sec.

An alternating voltage is given by e = 8sin628.4t. Find

1. peak value of e.m.f.
2. frequency or e.m.f.
3. instantaneous value of e.m.f. at time t = 10. ms

The fundamental frequency of an air column in a pipe closed at one end is in unison with the third overtone of an open pipe. Calculate the ratio of lengths of their air columns

A particle performing linear S.H.M. has a period of 6.28 seconds and a pathlength of 20 cm. What is the velocity when its displacement is 6 cm from mean position?

A body of moment of inertia 5 kgm² rotating with an angular velocity 6 rad/s has the same kinetic energy as a mass of 20 kg moving with a velocity of ......

Define linear S.H.M.

Show that a linear S.H.M. is the projection of a U.C.M. along any of its diameter.

State the theorem of parallel axes about moment of inertia.

Draw a neat labelled diagram for the construction of 'cyclotron'

Draw a neat labelled diagram for the construction of 'cyclotron'

The energy of photon of wavelength X is_____ .

[h = Planck’s constant, c = speed of light in vacuum]

When longitudinal wave is incident at the boundary of denser medium, then............................

1. compression reflects as a compression.
2. compression reflects as a rarefaction.
3. rarefaction reflects as a compression.
4. longitudinal wave reflects as transverse wave.

The spin dryer of a washing machine rotating at 15 r.p.s. slows down to 5 r.p.s. after making 50 revolutions. Find its angular acceleration.

In a semiconductor, acceptor impurity is.................................

1. antimony
2. indium
3. phosphorous
4. arsenic