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

Explain the reflection of light at a plane surface with the help of a neat ray diagram. 

Find the amount of work done in rotating an electric dipole of dipole moment 3.2 x 10^{- 8}Cm from its position of stable equilibrium to the position of unstable equilibrium in a uniform electric field if intensity 10⁴ N/C.  

An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peak value of the AC is 28 V. The rms secondary voltage is nearest to ______ 

State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer. 

Distinguish between Step up and Step Down Transformer.

What is Transformer?

Explain step up and step down transformer?

The primary of a transformer has 40 turns and works on 100 V and 100 W. Find a number of turns in the secondary to step up the voltage to 400 V. Also calculate the current in the secondary and primary.

Describe the construction and working of a transformer with a neat labelled diagram.

According to De-Broglie, the waves are associated with ______ 

An electron is accelerated through a potential of 120 V. Find its de Broglie wavelength.

Calculate De Broglie's wavelength of the bullet moving with speed 90m/sec and having a mass of 5 gm. 

Explain De Broglie’s Hypothesis.

The radii of Bohr orbit are directly proportional to ______ 

According to Bohr's second postulate, the angular momentum of the electron is the integral multiple of `h/(2pi)`. The S.I unit of Plank constant h is the same as ______ 

For the hydrogen atom, the minimum excitation energy ( of n =2) is ______

The speed of electron having de Broglie wavelength of 10 ^-10 m is ______ 
(m_e = 9.1 × 10^-31 kg, h = 6.63 × 10^-34 J-s) 

If a_O is the Bohr radius and n is the principal quantum number then, state the relation for the radius of n^th orbit of the electron in terms of Bohr radius and principal quantum number. 

What is the energy of an electron in a hydrogen atom for n = ∞?  

The linear momentum of the particle is 6.63 kg m/s. Calculate the de Broglie wavelength.