CUET (UG) entrance exam Question Bank Solutions for Physics

A man covers his body with a blanket of thickness 4 mm. His temperature is 37°C and that of the atmosphere is 27°C. If the coefficient of thermal conductivity of wool is 1.2 × 10^-5 MKS units, heat lost by him per hour per square meter area is: 

If E_a be the electric field strength of a short dipole at a point on its axial line and E_e that on the equatorial line at the same distance, then:

Two thin lenses are in contact and the focal length of the combination is 80 cm. If the focal length of one lens is 20 cm, then the power of the other lens will be:

As the temperature of conductor increase, it's resistivity and conductivity change. The ratio of resistivity to conductivity.

An electric dipole is placed at an angle of 30° to a non-uniform electric field. The dipole will experience ________.

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 ac is varying with time t as ac = k²rt², where k is a constant. The power delivered to the particle by the forces acting on it is ______.

The life time of muon in the rest frame is 2 × 10^-6 sec. A beam of muons emerges from a cyclotron with velocity where c is the velocity of light The mean life of muons observed in the laboratory frame will be ______.

In a CE transistor amplifier, the audio signal voltage across the collector resistance of2 kΩ is 2 V If the base resistance is 1 kΩ and the current amplification of the transistor is 100, the input signal voltage is

If `|vec"A" xx vec"B"| = sqrt3 vec"A" . vec"B"` then the value of  is `|vec"A" xx vec"B"|` is

The period of oscillation of a simple pendulum is T = `2π sqrt"L"/"g"`. The measured value of L is 20.0 cm known to have 1 mm accuracy and the time for 100 oscillations of the pendulum is found to be 90 s using a wristwatch of ls resolution. The accuracy in the determination of g is:

The ratio of the weight of a man in a stationary lift and in a lift accelerating downwards with a uniform acceleration α is 3 : 2. The acceleration of the lift is: 

The electric intensity due to a dipole of length 10 cm and having a charge of 500 µC, at a point on the axis at a distance 20 cm from one of the charges in air, is:

In a common base amplifier, the phase difference between the input signal voltage and output voltage is ______.

In common emitter amplifier, the current gain is 62. The collector resistance and input resistance are 5 kΩ and 500 Ω respectively. If the input voltage is 0.01 V, the output voltage is:

An electric dipole of moment `vec"p"` is placed normal to the lines of force of electric intensity `vec"E"`, then the work done in deflecting it through an angle of 180° is:

A pnp transistor is used in common-emitter mode in an amplifier circuit. A change of 40 µA in the base current brings a change of 2 mA in collector current and 0.04 V in base emitter voltage. Which of the following is the correct value of the input resistor R_in?

In a non-uniform electric field, electric dipole experiences:-

Fuse wire should have

Phase diffⁿ between voltage and current in a capacitor in A.C Circuit is.