List of top Physics Questions asked in CUET (UG)

Why do light emitting diodes are preferred over conventional incandescent low power lamps?

The truth table for one of the following logic gates is given. Identify the logic gate

Two sitar stings A and B playing a note are slightly out of tune and produces beats of frequency 5 Hz. The tension in string B is slightly increased and beat frequency become 3 Hz. What is the original frequency of B if frequency of A is 427 Hz.

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A transmitting antenna at the top of a tower has a height 18 m and the height of the receiving antenna is 32 m. What is the maximum distance between them for satisfactory communication in line-of-sight mode? Given radius of earth is 6.4 × 10⁶ m

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The forbidden energy band gap in conductors, semi conductors and insulators are E_G1, E_G2 and E_G3, respectively. The relation among them is

The statement that is NOT true about induced emf is:

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:

At a place, the horizontal component of earth's magnetic field is $4 \times 10^{-4}T$ and angle of dip is 60°. The value of horizontal component of earth's magnetic field at the equator is :

Six equal resistances are connected between points P, Q and R as shown in the figure. The net resistance will be maximum between:

A series AC circuit has a resistance 8Ω and a reactance of 6Ω . The impedance of the circuit is:

A bulb of 100 W glows for 6 hours a day. The units of energy consumed in 7 days would be :

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	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

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Following are the wavelength of some constituents of the electromagnetic spectrum. The wavelength range that are used in Radar system for Aircraft navigation is:
(A) 1 mm to 700 nm
(B) 0.1 m to 1 mm
(C) 400 nm to 1 nm
(D) < 10-3 nm
(E) > 1m
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A charge of 5 μC moves with a speed of $2 \times 10^6$ m/s along the positive y-axis. A magnetic field $\vec{B}$ of strength ($2\hat{i}+ \hat{k}$)T exists in space. The magnetic force acting on the charge is :

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	LIST I		LIST II
A.	Magnetic dipole moment	I.	Weber/$m^2$
B.	Magnetic permeability	II.	Am (Ampere m)
C.	Pole strength	III.	Henry/m
D.	Magnetic flux density	IV.	$Am^2$ (Ampere $m^2$)

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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:

A coil having 'n' turns and resistance 'R'Ω is connected with a galvanometer of resistance '4R' Ω. What is the induced current in the circuit when this combination (coil+galvanometer) is moved in time t from a magnetic flux Φ1 to Φ2?

Ten capacitors each of 2 µF capacity were arranged in two rows such that first row contains 6 capacitors in series where as the rest were in second row. The equivalent capacitance of the network is:

The circuits where transformers are used:

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

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:

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Ferro-magnetic materials used in transformer core must have: