List of top Physics Questions

An electron, a proton, an \(\alpha\)-particle and a hydrogen atom are moving with the same kinetic energy. The associated de-Broglie wavelength will be longest for --

The power rating of a ceiling fan rotating with a constant torque of 2 Nm with an angular speed of 2\(\pi\) rad/s will be ............

A string of length 2 m is vibrating with 2 loops. The distance between its node and adjacent antinode is ............

A transformer increases an alternating e.m.f. from 220V to 880V. If primary coil has 1000 turns, the number of turns in the secondary coil are .............

Which of the following equations gives correct expression for the internal resistance of a cell by using potentiometer?

Electric potential 'V' at a distance 'r' from a point charge is directly proportional to ............

In Bernoulli's theorem, which of the following is constant?

"If two systems are each in thermal equilibrium with a third system, they are also in thermal equilibrium with each other." This statement refers to :

Match List-I with List-II for the index of refraction for yellow light of sodium (589 nm)

LIST-I (Materials)		LIST-II (Refractive Indices)
A.	Ice	I.	1.309
B.	Rock salt (NaCl)	II.	1.460
C.	CCl₄	III.	1.544
D.	Diamond	IV.	2.417

Choose the correct answer from the options given below:

Match the LIST-I with LIST-II

LIST-I		LIST-II
A.	Compton Effect	IV.	Scattering
B.	Colors in thin film	II.	Interference
C.	Double Refraction	III.	Polarization
D.	Bragg's Equation	I.	Diffraction

Choose the correct answer from the options given below:

Match List-I with List-II on the basis of two simple harmonic signals of the same frequency and various phase differences interacting with each other:

LIST-I (Lissajous Figure)		LIST-II (Phase Difference)
A.	Right handed elliptically polarized vibrations	I.	Phase difference = \( \frac{\pi}{4} \)
B.	Left handed elliptically polarized vibrations	II.	Phase difference = \( \frac{3\pi}{4} \)
C.	Circularly polarized vibrations	III.	No phase difference
D.	Linearly polarized vibrations	IV.	Phase difference = \( \frac{\pi}{2} \)

Choose the correct answer from the options given below:

For Particular Integral, Match the LIST-I with LIST-II

LIST-I		LIST-II
A.	\( \frac{1}{(D-1)} x^2 \)	I.	\( xe^x \)
B.	\( \frac{1}{D^2+D+1} \cos x \)	II.	\( \sin x \)
C.	\( \frac{1}{(D-1)^2} e^x \)	III.	\( \frac{x^2 e^x}{2} \)
D.	\( \frac{1}{D^3-3D^2+4D-2} e^x \)	IV.	\( -(x^2 + 2x + 2) \)

(Note: List-I Item A is assumed to be \( \frac{1}{D-1} x^2 \) based on the options)

If \( x = r\cos\theta, y = r\sin\theta \) then Match the LIST-I with LIST-II

LIST-I		LIST-II
A.	\( \frac{\partial r}{\partial x} \)	I.	\( \frac{1}{r} \)
B.	\( \frac{\partial r}{\partial y} \)	II.	\( \frac{y}{r} \)
C.	\( \frac{\partial(x,y)}{\partial(r,\theta)} \)	III.	\( \frac{x}{r} \)
D.	\( \frac{\partial(r,\theta)}{\partial(x,y)} \)	IV.	\( r \)

(Note: There is a typo in the question; it should be \( y = r \sin\theta \))

Match the LIST-I with LIST-II

LIST-I (Expressions)		LIST-II (Values)
A.	\( i^{49} \)	I.	1
B.	\( i^{38} \)	II.	\(-i\)
C.	\( i^{103} \)	III.	\(i\)
D.	\( i^{92} \)	IV.	\(-1\)

Choose the correct answer from the options given below:

Match the LIST-I with LIST-II

LIST-I (Energy of a particle in a box of length L)		LIST-II (Degeneracy of the states)
A.	\( \frac{14h^2}{8mL^2} \)	I.	1
B.	\( \frac{11h^2}{8mL^2} \)	II.	3
C.	\( \frac{3h^2}{8mL^2} \)	III.	6

Choose the correct answer from the options given below:

Match the LIST-I with LIST-II

LIST-I (Type of decay in Radioactivity)		LIST-II (Reason for stability)
A.	Alpha decay	III.	Nucleus is mostly heavier than Pb (Z=82)
B.	Beta negative decay	IV.	Nucleus has too many neutrons relative to the number of protons
C.	Gamma decay	I.	Nucleus has excess energy in an excited state
D.	Positron Emission	II.	Nucleus has too many protons relative to the number of neutrons