List of top Physics Questions asked in Bihar Board Class XII

Check the continuity of the given circuit by using multimeter.
Identify diode, transistor, LED and I.C. from the given mixed collection.
Show formation of image (nature and size) by a convex lens with the help of a screen and candle.
Show lateral deviation of a beam of light incident obliquely on a glass slab.
By using multimeter distinguish between n-p-n and p-n-p transistor.
Show the formation of image by a concave mirror using a candle and a screen.
Determine the resistance per centimetre of the given wire by plotting a graph of potential difference vs current.
Estimate the resistance of a galvanometer by half-deflection method.
Draw I - V characteristic curve of p-n junction in forward bias and reverse bias.
Find the focal length of convex mirror using convex lens.
Determine the refractive index of a glass slab using a travelling microscope.
Determine the refractive index of the material of prism.
Verify the laws of combination (series or parallel) of resistance using meter bridge.
Find the resistance of a given wire using meter bridge.
Determine the internal resistance of the given primary cell using potentiometer.
Find the focal length of given concave mirror by using two-pin method.
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.
With neat diagram describe the construction and working of an astronomical telescope. Find its magnifying power.
For a thin lens find the formula \(\frac{1}{f} = (\mu - 1) \left(\frac{1}{R_1} - \frac{1}{R_2}\right)\), where the meaning of symbols is general.
Derive the condition for resonance in the L-C-R series alternating current circuit. Find the expression for resonant frequency.
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.
On what two factors does the capacity of a condenser depend?