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

If a = 0. 72 and t = 0.04, then the value of r is ______.

Efficiency of transformer is the ratio of ______.

Calculate the de Broglie wavelength associated with an electron moving with a speed of `5 xx 10^6` m/s. `(m_e = 9.1 xx 10^(-31)kg)`

Derive an expression for the total emf induced in a conducting rotating rod.

At what temperature will therms velocity of a gas be four times its value at STP?

A magnetic flux associated with a coil changes by 0.04 Wb in 0.2 second. The induced emf with coil is ______.

If a = 0. 72 and r = 0.24, then the value of t is ______.

Draw a neat labelled diagram of Internal resistance of a cell using a potentiometer.

Find the ratio of radius of 1^st Bohr orbit to that of 4^th Bohr orbit.

State dimension of potential gradient.

Draw the graph for variation of magnetic suceptibility (`chi`) of a material with temperature (T) and hence explain Curie temperature. 

The radius of the first Bohr orbit in the hydrogen atom is 0.5315 Å. The radius of the second Bohr orbit in the hydrogen atom is ______.

Which of the following materials is diathermanous?

Which one of the following is not a characteristics of SHM?

A ray of light passes from air to glass. If the angle of incidence is 74° and the angle of refraction is 37°, find the refractive index of the glass.

What is the internal resistance of the cell?

A particle executing SHM has velocities v₁ and v₂ when it is at distance x₁ and x₂ from the centre of the path. Show that the time period is given by `T=2pisqrt((x_2^2-x_1^2)/(v_1^2-v_2^2))`

On what factors does radius of gyration depend?

On what factors radius of gyration does not depend?

Can you locate some similarity between the centre of mass and radius of gyration?