HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

A conductor in the form of a circular arc of the radius of curvature R subtends an angle Ø at its centre of curvature. If the current in the conduct is I, the magnetic induction at the centre of curvature is ______.

What is the ripple factor?

A curved road 5 m wide is to be designed with a radius of curvature 900 m. What should be the elevation of the outer edge of the road above the inner edge optimum speed of the vehicles rounding the curve is 30 m/s.

The centripetal acceleration of the bob of a conical pendulum is, in the usual notation, ______.

Explain in brief the basic construction of a moving-coil table galvanometer whit a neat labelled diagram.

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?

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 ______.

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.