List of top Questions asked in CUET (UG)

Which of the following pairs can be distinguished by Lucas test?

Identify the following named reaction:

The most stable conformation of 1,2-dibromomethane among the following is:

A compound with the molecular formula $C_{5}H_{5}N$ and having 3 double bonds will be ________.

In the circuit shown in figure, the potential barrier for Ge diode is 0.3 V and for Si diode it is 0.7 V. What is the voltage $V_{A}$?

The correct IUPAC name for the given molecule should be ________.

A positive charge q is distributed over a circular ring of radius a. It is placed in a horizontal plane and is rotated about its axis at a uniform angular speed $\omega$. A horizontal magnetic field B exists in the space. The torque acting on the ring due to the magnetic force is ________.

When a beam of 10.6 eV photons falls on a platinum surface, 53% of incident photons eject photoelectrons. If intensity is $2.0~W/m^2$ and area is $1.0\times10^{-4}~m^2$, the number of photoelectrons emitted per second is:

What is the magnetic induction of the field at the point O in a current I carrying wire that has the shape as shown in the figure? The radius of the curved part of the wire is R, the linear parts are assumed to be very long.

Two slits in Young's interference experiment have width in the ratio 1: 4. The ratio of intensity at the maxima and minima in their interference is ________.

If the total energy of a particle executing SHM is E, then the potential energy V and the kinetic energy K of the particle in terms of E when its displacement is half of its amplitude will be ________.

A spring balance has a scale that reads 0 to 50 kg. The length of the scale is 20 cm. A body suspended from this spring, when displaced and released, oscillates with a period of 0.60 s. What is the weight of the body?

Soapy water drips from a capillary. When the drop breaks away, the diameter of its neck is D. The mass of the drop is m. The surface tension of soapy water is ________.

A parallel beam of light ray parallel to the x-axis is incident on a parabolic reflecting surface $x=2by^{2}$ as shown in the figure. After reflecting it passes through focal point F. What is the focal length of the reflecting surface?

A bomb explodes in air when it has a horizontal speed of v. It breaks into two identical pieces of equal mass. If one goes vertically up at a speed of 4v, the velocity of other immediately after the explosion is ________.

A family uses 8 kW of power. Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square meter. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8 kW? }

A 40 kg boy whose legs are 4 $cm^{2}$ in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can withstand a stress of 0.9 $\times10^{8}N/m^{2}.$ The Young's modulus for the material of the bone is ________.

The length of a metal wire is $l_{1}$ when the tension is $T_{1}$ and $l_{2}$ when the tension is $T_{2}$. The unstretched length of the wire is ________.

Two cylinders A and B of the same material have same length, their radii being in the ratio 1: 2 respectively. The two are joined end to end as shown in the figure. One end of cylinder A is rigidly clamped while free end of cylinder B is twisted through an angle $\theta$. The angle of twist of cylinder A is ________.

Assuming the earth to be a sphere of a uniform mass density, how much would a body weigh half way down to the center of earth if it weighed 250 N on the surface? }

A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 m $s^{-1}$. How long does the body take to stop? }

The velocity of a body of mass 2 kg as a function of time t is given by $v(t)=2t\hat{i}+t^{2}\hat{j}.$ The force acting on it, at time $t=2$ s is given by ________.

A body moves from point A to B under the action of a force, varying in magnitude as shown in the figure. Force is expressed in newton and displacement in meter. What is the total work done? }

An aircraft executes a horizontal loop of radius 1.00 km with a steady speed of $900~km/h$. Its centripetal acceleration is ________.

A particle of mass m is moving in a circular path of constant radius r such that, its centripetal acceleration $a_{c}$ is varying with time t as $a_{c}=k^{2}r~t^{2}$ where k is a constant. The power delivered to the particle by the forces acting on it is ________.