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- Question 1 of 40
##### 1. Question

A car of mass 1000 kg moves on a circular track of radius 40 m. If the coefficient of friction is 1.28. The maximum velocity with which the car can be moved, is

CorrectIncorrect - Question 2 of 40
##### 2. Question

The escape velocity for the earth is 11.2 km/s. The mass of another planet 100 times mass of earth and its radius is 4 times radius of the earth. The escape velocity for the planet is

CorrectIncorrect - Question 3 of 40
##### 3. Question

Light ravels faster in air than that in glass. This is accordance with

CorrectIncorrect - Question 4 of 40
##### 4. Question

The speed of air flow on the upper and lower surface of a wing of an aeroplane are υ

_{1}respectively. If A is the cross section area of the wing and ρ is the density of air, then the upward life isCorrectIncorrect - Question 5 of 40
##### 5. Question

A body is thrown with a velocity of 8.8 m/s making an angle of 30° with the horizontal. It will hit the ground after a time

CorrectIncorrect - Question 6 of 40
##### 6. Question

A radioactive element

_{90}X^{238}decays into_{83}Y^{222}. The number of β-particles emitted areCorrectIncorrect - Question 7 of 40
##### 7. Question

Minimum excitation potential of Bohr’s first orbit in hydrogen atom is

CorrectIncorrect - Question 8 of 40
##### 8. Question

A gas expands 0.25 m

^{3}at constant pressure 10^{3}N/m^{2}, the work done isCorrectIncorrect - Question 9 of 40
##### 9. Question

The work done in increasing the size of soap film for 10 cm × 6 m to 10 cm × 11cm is 3 × 10

^{−4}J. The surface tension of the film isCorrectIncorrect - Question 10 of 40
##### 10. Question

A parallel plate condenser is filled with two dielectrics as shown in figure. Area of each pate is A m

^{2}and the separation is d metre. The dielectric constants are K_{1}and K_{2}respectively. Its capacitance in farad will beCorrectIncorrect - Question 11 of 40
##### 11. Question

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it

CorrectIncorrect - Question 12 of 40
##### 12. Question

A battery of emf 10 V and internal resistance of 0.5 ohm is connected across a variable resistance R. The maximum value of R is given by

CorrectIncorrect - Question 13 of 40
##### 13. Question

For a gas This gas is made up of molecules which are

CorrectIncorrect - Question 14 of 40
##### 14. Question

A point source of light is placed 4 m below the surface of water of refractive index 5/3. The minimum diameter of a disc which should be placed over the source on the surface of water to cut-off all light coming out of water is

CorrectIncorrect - Question 15 of 40
##### 15. Question

A moving body of mass m and velocity 3 km/h collides with a rest body of mass 2 m and stick to it. Now the combined mass starts to move. What will be the combined velocity?

CorrectIncorrect - Question 16 of 40
##### 16. Question

A transverse wave is represented by the equation

For what value of λ is the particle velocity equal to two times the wave velocity

CorrectIncorrect - Question 17 of 40
##### 17. Question

Ionisation potential of hydrogen atom is 13.6 eV. Hydrogen atom on the ground state rarely excited by monochromatic radiation of photon 12.1 eV. The special line mitted by a hydrogen atom according to Bohr’s theory will be

CorrectIncorrect - Question 18 of 40
##### 18. Question

The internal resistance of a primary cell is 4Ω. It generates a current of 0.2 A in an external resistance of 21Ω. The rate at which chemical energy to consumed in providing current is

CorrectIncorrect - Question 19 of 40
##### 19. Question

The binding energy per nucleon is maximum in the case

CorrectIncorrect - Question 20 of 40
##### 20. Question

Two rigid bodies A and B rotate with rotational kinetic energies E

_{A}and E_{B}respectively. The moments of inertia of A and B about the axis of rotation are I_{A}and I_{B}respectively.If and E

_{A}= 100 = E_{B}, the ratio of angular momentum (L_{A}) of A to the angular momentum (L_{B}) of B isCorrectIncorrect - Question 21 of 40
##### 21. Question

The working principle of a ball point pen is

CorrectIncorrect - Question 22 of 40
##### 22. Question

Progressive waves are represented by the equation

y

_{1}= a sin(ωt – x)and y

_{2}= b cos (ωt – x)The phase difference between waves is

CorrectIncorrect - Question 23 of 40
##### 23. Question

Two simple pendulums of length 0.5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will gain be in the phase when the pendulum of shorter length has completed x oscillations, where k is

CorrectIncorrect - Question 24 of 40
##### 24. Question

A balloon contains 500 m

^{3}of helium at 27℃ and 1 atmosphere pressure. The volume of the helium at −3℃ temperature and 0.5 atmosphere pressure will beCorrectIncorrect - Question 25 of 40
##### 25. Question

220 V, 50 Hz, AC source is connected to an inductance of 0.2 H and a resistance of 20 Ω in series. What is the current in the circuit?

CorrectIncorrect - Question 26 of 40
##### 26. Question

In 0.2 s, the current in a coil increases from 2.0 A to 3.0 A. If inductance of coil is 60 mH, then induced current in external resistance of 3 Ω will be

CorrectIncorrect - Question 27 of 40
##### 27. Question

Two coherent light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are

CorrectIncorrect - Question 28 of 40
##### 28. Question

A galvanometer acting as a voltmeter should have

CorrectIncorrect - Question 29 of 40
##### 29. Question

The equivalent resistance across A and B is

CorrectIncorrect - Question 30 of 40
##### 30. Question

A black body has a wavelength of λ at temperature 2000 K. Its corresponding wavelength at temperature 3000 K will be

CorrectIncorrect - Question 31 of 40
##### 31. Question

At room temperature, copper has free electron density of 8.4 × 10

^{28}m^{−3}. The electron drift velocity in a copper conductor of cross-sectional area of 10^{−6}m^{2}and carrying a current of 5.4 A, will beCorrectIncorrect - Question 32 of 40
##### 32. Question

A uniform wire of resistance R and length L is cut into four equal parts, each of length L/4 which are then connected in parallel combination. The effective resistance of the combination will be

CorrectIncorrect - Question 33 of 40
##### 33. Question

The half-life of radio isotope is 4 h. If initial mass of the isotope was 200 g, then mass remaining after 24 h will be

CorrectIncorrect - Question 34 of 40
##### 34. Question

Which logic gate is represented by the following combination of logic gates?

CorrectIncorrect - Question 35 of 40
##### 35. Question

The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5eV. According to Einstein’s equation the metals which will emit photo, electrons for a radiation of wavelength 4100 Å is/are

CorrectIncorrect - Question 36 of 40
##### 36. Question

Two boys are standing at the ends A and B of a ground, where AB = a. The boy at B starts running in a direction perpendicular to AB with velocity υ

_{1}. The boy at A starts running simultaneously with velocity υ and catches the other boy in a time t, where t isCorrectIncorrect - Question 37 of 40
##### 37. Question

A 5 amp fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is

CorrectIncorrect - Question 38 of 40
##### 38. Question

A force F is given F = at + bt

^{2}, where, t is time. What are the dimensions of a and b?CorrectIncorrect - Question 39 of 40
##### 39. Question

Two equal negative charges –q are fixed at the point (0, α) and (0, −α) on the y-axis. A positive charge Q is released from rest at the point (2a, 0) on the x-axis. The charge will

CorrectIncorrect - Question 40 of 40
##### 40. Question

An ice-cube of density 900 kg/m

^{3}. The percentage of volume of ice-cube outside the water isCorrectIncorrect