AIPMT Prelims Physics Class 11 Questions
307 questions
The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0°C
In which of the following reactions, standard reaction entropy change (ΔS°) is positive and standard Gibb’s energy change (ΔG°) decreases sharply with increasing temperature?
Standard enthalpy of vaporisation ΔvapH⁰ for water at 100°C is 40.66 kJmol⁻¹. The internal energy of vaporisation of water at 100°C (in kJ mol⁻¹) is
Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm. The rate of heating is constant. Which one of the following graphs represents the variation of temperature with time?
One mole of an ideal gas goes from an initial state A to final state B via two processes: It first undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3V to V at constant pressure. The correct P⁻V diagram representing the two processes is:
A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 ms⁻¹. It collides with a horizontal spring of force constant 200 Nm⁻¹. The maximum compression produced in the spring will be
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is
Two spheres A and B of masses m₁ and m₂ respectively collide. A is at rest initially and B is moving with velocity v along x-axis. After collision B has a velocity in a direction perpendicular to the original direction. The mass A moves after collision in the direction
A particle has initial velocity and acceleration . The magnitude of velocity after 10 seconds will be
The height which the weight of a body becomes 1/, its weight on the surface of earth (radius R) is
When a string is divided into three segments of length l₁, l₂, and l₃, the fundamental frequencies of these three segments are v₁, v₂ and v₃ respectively. The original fundamental frequency (v) of the string is
A geostationary satellite is orbiting the earth at a height of 5R above the surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is
ABC is an equilateral triangle with O as its centre. F̅₁, F̅₂ and F̅₃ represent three forces acting along the sides AB, BC and AC respectively. If the total torque about O is zero then the magnitude of F̅₃ is
If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q?
When a mass is rotating in a plane about a fixed point, its angular momentum is directed along:
Two sources of sound placed close to each other, are emitting progressive waves given by y₁ = 4 sin 600 πt and y₂ = 5 sin 608 πt. An observer located near these two sources of sound will hear:
A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is
A spherical planet has a mass Mₚ and diameter Dₚ. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to
The potential energy of a particle in a force field is: U = A/r² - B/r, where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium the distance of the particle is
Two persons of masses 55 kg and 65 kg respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m and weighs 100 kg. The 55 kg man walks up to the 65 kg man and sits with him. If the boat is in still water the centre of mass of the system shifts by
A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is
The motion of a particle along a straight line is described by equation: x = 8 + 12t - t³ where x is in metre and t in second. The retardation of the particle when its velocity becomes zero, is
The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are
The dimensions of (μ₀ε₀)^(1/2) are
The moment of inertia of a thin uniform rod of mass M and length L about an axis passing through its midpoint and perpendicular to its length is I₀. Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is
A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 m/s², the velocity with which it hits the ground is
A person of mass 60 kg enters a lift of mass 940 kg and presses the button one control panel. The lift starts moving upwards with an acceleration 1.0 m/s². If g = 10 m/s², the tension in the supporting cable is
A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest
The instantaneous angular position of a point on a rotating wheel is given by the equation θ(t) = 2t² – 6t². The torque on the wheel becomes zero at
A particle moves in a circle of radius 5 cm with constant speed and time period 0.2 π s. The acceleration of the particle is
A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is
A planet is moving around the sun in an elliptical orbit. Its closest to the sun at a distance r₁ and farthest away at a distance of r₂. If v₁ and v₂ are the linear velocities at these points respectively. Then the ratio v₁/v₂ is
The potential energy of a system increases if work is done
A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is
A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s², the range of the missile is
A force F acting on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12 m is
When 1 kg of ice at 0°C melts to water at 0°C, the resulting change in its entropy, taking latent heat of ice to be 80 cal/°C is
During an isothermal expansion, a confined ideal gas does –150 J of work against its surrounding. This implies that
A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin is small, which graph correctly depicts the position of the particle as a function of time?
Two waves are represented by the equations y₁ = a sin(ωt + kx + 0.57)m and y₂ = a cos(ωt + kx)m, where x is in meter and t in s. The phase difference between them is
Out of the following functions representing motion of a particle which represents SHM?
Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
By what factors does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?
Which of the following is correct option for free expansion of an ideal gas under adiabatic condition?
If the enthalpy change for the transition of liquid water to steam is 30 kJ mol⁻¹ at 27°C, the entropy change for the process would be
Enthalpy change for the reaction, H₂(g) → 2H(g) is −869.6 kJ. The dissociation energy of H−H bond is
The value of ΔH for the reaction X₂(g) + 4Y₂(g) ⇌ 2XY₄(g) is less than zero. Formation of XY₄(g) will be favoured at
The dimension of , where is permittivity of free space and E is electric field, is
A particle moves a distance x in time t according to equation . The acceleration of particle is proportional to
Six vectors, through have the magnitudes and directions indicated in the figure. Which of the following statements is true?
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