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

A cyclist is undertaking horizontal circles inside a cylindrical well of radius 5 m. If the friction coefficient is 0.5, what should be the minimum speed of the cyclist?

Calculate (i) the pressure due to the weight of the water at a depth of 2.5 m and (ii) the depth below the surface of water at which the pressure due to the weight of the water equals 1.0 atm.

If the frequency of the input voltage 50 Hz is applied to a full wave rectifier, what will be the output frequency?

The angular displacement of a particle in 6 sec on a circle with angular velocity `pi/3` rad/sec is ______.

The surface tension of boiling water is ______.

A drop of water of radius 8 mm breaks into number of droplets each of radius 1 mm. How many droplets will be formed?

State Kirchhoff's current law sign conventions

Define angle of contact.

An electron in an atom is revolving around the nucleus in a circular orbit of radius 0.53 A, with a speed of 2 x 10⁶ m/s. Find the resultant orbital magnetic moment and angular momentum of electron.(e = 1.6 x 10^-19 C, m = 9.1 x 10^-31 kg)

A resistance of 3Ω is connected in parallel to a galvanometer of resistance 297Ω. Find the fraction of current passing through the galvanometer.

By increasing the voltage in an electron diffraction tube, the radius of the diffraction rings will ______.

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 ______.