List of top Physics Questions

The shape of graph between 1/u and 1/v in case of a convex lens is:

The energy diagram of a hydrogen atom is given below. Arrange the wavelengths corresponding to different emissions in increasing order.

Match List I with List II

List I: Frequency Range	List II: Types of Waves
(I) 1 × 1016 − 3 × 1021 Hz	(D) γ-rays
(II) 1 × 109 − 3 × 1011 Hz	(B) Microwaves
(III) 1 × 108 − 5 × 1022 Hz	(A) X-rays
(IV) 5 × 105 − 109 Hz	(C) Radio waves

A cell of constant emf is first connected to a resistance \(R_1\) and then to \(R_2\). If power delivered in both cases are same, then the internal resistance of the cell is:

Which of the following is/are responsible for the formation of Rainbow?
(A) Dispersion of light
(B) Interference of light
(C) Reflection of light
(D) Refraction of light
Choose the correct answer from the options given below:

In AC circuits, the relation that holds is \( Z = \frac{E_U}{I_U} \), where:

The susceptibility ($X_m$) and permeability (μ) of a perfectly diamagnetic substance are:

At what speed should a galaxy move with respect to earth so that spectral line of 600.0 nm appears as 600.6 nm?

To protect galvanometer from possible damages due to large current, which of the following should be connected to its coil:

For a long wire carrying a current of 10 A, the magnitude of magnetic field at a point 4 cm away from it will be:

Match List I with List II

	LIST I		LIST II
A.	Infra red waves	I.	Eye surgery
B.	Microwaves	II.	1 nm to 10-3 nm
C.	Ultraviolet	III.	Heat waves
D.	X-rays	IV.	Produced by special vaccum tubes

Choose the correct answer from the options given below:

Ferro-magnetic materials used in transformer core must have:

An emf of 0.5 V is developed in the secondary coil, when current in primary coil changes from 5.0 A to 2.0 A in 300 milliseconds. The mutual inductance of two coils would be:

An infinite line charge produces an electric field of 9 × 10⁶ N/C at a distance of 20 cm. The linear charge density will be :

Which of the following is connected to the coil of the galvanometer, to protect it from possible damages due to large current?

Match List I with List II

Choose the correct answer from the options given below:

An electromagnetic wave going through vacuum is described by \( E = E_0 \sin(kx - \omega t) \), \( B = B_0 \sin(kx - \omega t) \), then:

A parallel beam of monochromatic light of wavelength 460 nm passes through a long slit of width 0.1 mm. What is the angular divergence in which most of the light is diffracted?

Two point charges \(q\) and \(-3q\) are kept 12 cm apart. The distance of the point from \(q\) on the line between two charges at which potential due to this system of charges is zero will be:

The boiling point of water _______

Two protons P and Q are placed between two charged plates A and B as shown, then

The potential of a uniformly charged spherical shell at a point r/2 from its centre is 5 V. The potential at its surface is:
(Given radius of shell = r)

Electron and Photon have same de Broglie wavelength, which of the following is true for their momentum:

In an a.c. circuit, the rms voltage is \(100\sqrt{2}\) V. The peak value of voltage would be:

The magnitude of electric current is increasing from A towards B. If there is any induced current in the loop as shown in the figure, its direction will be: