List of top Questions asked in CUET (UG)

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

The electric field vector oscillates according to the equation \(\overrightarrow E = 4sin[1.8y +(5.4×10^6)t]\hat k\). The equation of magnetic field vector is:

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.

Match List I with List II

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

At what distance should an object be placed from a convex lens of focal length 15 cm to obtain a real image three times the size of the object?

A semiconductor has an electron concentration of 8 x 10¹³ m^-3 and hole concentration of 2 × 10³ m^-3. The semiconductor behaves as:

\(p→ n+v+ A\)
In this nuclear reaction A is a/an:

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

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

After 4 hours,\(\frac{1}{16}\) of the initial amount of a certain radioactive isotype remains undecayed. What is the half life of the isotope?

Match List I with List II

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Choose the correct statements from the following:
A. The minimum energy required to free the electron from the ground state of the hydrogen atom is 13.6 J
B. The principle quantum number n labels the stationary states in the ascending order of energy
C. Bohr gave the basic idea of discrete energy levels
D. de Broglie hypothesis provided an explanation for Bohr's second postulate for the quantization of angular momentum of the orbiting electron
E. line spectrum provides useful information about the atomic structure.
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What is the de Broglie wavelength associated with an elector accelerated through a potential difference of 144 V?

A parallel beam of light of wavelength 500 nm is incident normally on a slit of width d. If the distance between slit and screen is 0.6 m and distance of second order minimum from the centre of the screen is 6.0 mm, What is the width of the slit?

A body oscillate with SHM according to equation (SI unit),
\(x= 10cos (2πt+π/4)\)
at t= 1.5 s, calculate the speed of the body.

For a glass prism (μ= √3), the angle of minimum deviation is equal to the angle of prism. What is the angle of prism?

Which of the following statements are correct?
A. Number of photoelectrons emitted per second is directly proportional to the intensity of incident radiation
B. Cut off potential is the minimum negative potential given to the plate for which photocurrent becomes maximum
C. For a given frequency of the incident radiation, the stopping potential is independent of its intensity
D. Even for the exceedingly dim incident radiation apparent time lag is~ 109s or less
E. Photons are electrically neutral and are not deflected by electric and magnetic fields
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Two polaroids P₁ and P₂ are set in crossed positions. A third polaroid P₃ is placed between the two making an angle a with the axis passing from the first polaroid P₁, In what orientation will the transmitted intensity be maximum?

A flask contains Argon and Chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27°C. The ratio of root mean square speed of molecules of two gases will be: (atomic mass of Argon =40 u and molecular mass of Chlorine = 71 u)

Choose the correct formula for magnifying power of a simple microscope from the following

Which one of the following cannot be polarised?

Light from a point source in air falls on spherical glass surface (n = 1.4 and radius of curvature 20 cm). The distance of light source from the glass surface is 150 cm, At what position is the image formed?

Which of the following statement is not true for the electromagnetic waves?