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

Define: Junction

A strong magnetic field is applied to a stationary electron. Then the electron ______ 

Which of the following is not a unit of magnetic induction?

What happens to the magnetic field at the centre of a circular current-carrying coil if we double the radius of the coil keeping the current unchanged? 

Explain the construction and working of the Moving coil Galvanometer.  

Show that the orbital magnetic dipole moment of a revolving electron is `("evr")/2`

The energy stored in a 50 mH inductor carrying a current of 4 A is ______ 

The energy stored in a 50 mH inductor carrying a current of 4 A is ______ 

State the condition at which we say the two coils kept close to each other are perfectly coupled with each other. 

State the condition at which we say the two coils kept close to each other are perfectly coupled with each other. 

Using Ampere's law, obtain an expression for the magnetic induction near a current-carrying straight infinitely long wire. 

Using Ampere's law, obtain an expression for the magnetic induction near a current-carrying straight infinitely long wire. 

The work function of a metal is 4.2 eV. Its threshold wavelength will be ______.

Ultraviolet radiation of 6.2 eV falls on an aluminum surface (work function 4.2 eV). The kinetic energy in joules of the fastest electron emitted is ______ 

Define threshold frequency.

What is cut-off or stopping potential?  

What is mean by the dual nature of matter? 

Calculate the stopping potential when the metal with the work function 0.6 eV is illuminated with the light of 2 eV.

Two open organ pipes of lengths 49 cm and 50 cm sounded together beat at 7 per second. The speed of sound is ______.

Determine the motional emf induced in a straight conductor rotating in a uniform magnetic field with constant angular velocity about a transverse axis through one end.