List of top Physics Questions asked in Bihar Board Class XII

What do you understand by capacity of any conductor? Find an expression for the capacity of a cylindrical condenser.
Define magnetic moment. Write its S.I. unit and dimension.
The horizontal component of earth's magnetic field at any place is \(\sqrt{3}\) times its vertical component. What will be the value of angle of dip at that place?
Write down two necessary conditions for interference of light.
What will be the path followed by a charged particle moving along a magnetic field.
The decay constant of a radioactive substance is 5.2 x 10\(^3\) per year. What is its half-life?
What is carbon dating?
Differentiate between primary and secondary rainbows.
A convex lens of refractive index 1.5 is kept in a liquid medium having same refractive index. What is the focal length of the lens in this medium?
Lenz's law follows the law of conservation of energy. Explain.
What is photo-cell? Write down its two applications.
Under what condition will the magnifying power of a microscope be maximum?
What is Curie law?
Write down truth table and Boolean expression for NOR and NAND gates.
What are '\(\alpha\)' and '\(\beta\)' parameters of transistor? What is their relation?
X-rays are
Describe the two shortcomings of Bohr model of atom.
The critical angle for total internal reflection of a ray from any medium to vacuum is 30\(^{\circ}\). Then velocity of light in the medium will be
For resonance condition in any L-C-R circuit, the phase-difference between applied voltage and current is
In step-up transformer, the value of current in secondary coil compared to primary coil is
In a vertically upwards magnetic field \(\vec{B}\), a positively charged particle is projected horizontally eastwards. What will be the direction of force on the particle?
The coefficient of reflection for total internal reflection will be
The final image formed by a terrestrial telescope is
A spherical mirror is immersed in water. Its focal length will
Two resistors R and 2R are connected in series in an electric circuit. The thermal energy developed in R and 2R will be in ratio