List of top Physics Questions

With neat diagram describe the construction and working of an astronomical telescope. Find its magnifying power.
Derive the condition for resonance in the L-C-R series alternating current circuit. Find the expression for resonant frequency.
Explain the working of P-N junction diode. Draw the circuit of full wave rectifier and explain its working.
State and explain Kirchhoff's laws. Applying these laws, obtain the balanced condition of Wheatstone bridge.
What will be the path followed by a charged particle moving along a magnetic field.
On what two factors does the capacity of a condenser depend?
What do you understand by capacity of any conductor? Find an expression for the capacity of a cylindrical condenser.
Write down two necessary conditions for interference of light.
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?
What is current density? Discuss.
Define modulation. Write its types.
A sphere of radius 5 cm has a charge of 31.41 \(\mu\)C. Calculate the surface density of charge.
Lenz's law follows the law of conservation of energy. Explain.
The decay constant of a radioactive substance is 5.2 x 10\(^3\) per year. What is its half-life?
What are '\(\alpha\)' and '\(\beta\)' parameters of transistor? What is their relation?
What is photo-cell? Write down its two applications.
What is carbon dating?
Write down truth table and Boolean expression for NOR and NAND gates.
What is Curie law?
Differentiate between primary and secondary rainbows.
Under what condition will the magnifying power of a microscope be maximum?
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?
X-rays are
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?