List of top Physics Questions

Define modulation. Write its types.
Lenz's law follows the law of conservation of energy. Explain.
What is photo-cell? Write down its two applications.
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?
What are '\(\alpha\)' and '\(\beta\)' parameters of transistor? What is their relation?
Differentiate between primary and secondary rainbows.
Write down truth table and Boolean expression for NOR and NAND gates.
What is Curie law?
Under what condition will the magnifying power of a microscope be maximum?
The decay constant of a radioactive substance is 5.2 x 10\(^3\) per year. What is its half-life?
What is carbon dating?
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?
X-rays are
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
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
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
If the distance between the two charges is increased, then the electrostatic potential energy of the charges
The value of electric potential at a distance r from a point charge is
The relation between the drift velocity (\(V_d\)) and applied electric field (E) of a conductor is
What is mainly measured by potentiometer?
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