Class/Course  Engineering Entrance
Subject  Physics
Total Number of Question/s  3094
Just Exam provide question bank for Engineering Entrance standard. Currently number of question's are 3094. We provide this data in all format (word, excel, pdf, sql, latex form with images) to institutes for conducting online test/ examinations. Here we are providing some demo contents. Interested person may contact us at info@justexam.in

1. Measurements  Quiz
1. A body of mass m= 3.513 kg is moving along the xaxis with a speed of 5.00 ms^{1}. The magnitude of its momentum is recorded as
a) 17.6 kg ms^{1}
b) 17.565 kg ms^{1}
c) 17.56 kg ms^{1}
d) 17.57 kg ms^{1}
2. Out of the following pairs, which one does not have identical dimensions?
a) Angular momentum and Planck constant
b) Impulse and momentum
c) Moment of inertia and moment of a force
d) Work and torque

2. Kinematics  Quiz
1. The relation between time t and distance x is t = ax^{2} + bx, where a and b are constants. The acceleration is
a) 2 abv^{2}
b) 2 bv^{3}
c)  2av^{3}
d) 2 av^{2}
2. From a building two balls A and B are thrown such that A is thrown upwards and B downwards (both vertically). If v_{A} and v_{B} are their respective velocities on reaching the ground, then
a) v_{B} > v_{A}
b) v_{A} = v_{B}
c) v_{A} > v_{B}
d) Their velocities depend on their mases

3. Laws of Motion  Quiz
1. Consider the following two statements :
A. Linear momentum of a system of particles is zero.
B. Kinetic energy of a system of particles is zero
Then
a) A does not imply B and B does not imply A
b) A implies B but B does not imply A
c) A does not imply B but B implies A
d) A implies B and B implies A
2. A block is kept on a frictionless inclined surface with angle of inclination α. The incline is given an acceleration a to keep the block stationary. Then a is equal to
a) $\frac{g}{tan\alpha }$
b) g cosec θ
c) g
d) g tan θ

4. Work, Energy and Power  Quiz
1. The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant k and compresses it by length L. The maximum momentum of the block after collision is
a) $\sqrt{MkL}$
b) $\frac{kL^{2}}{2M}$
c) Zero
d) $\frac{ML^{2}}{k}$
2. A spring of spring constant 5 x 10^{3} N/m is stretched initially by 5 cm from the unstretched it position. Then the work required to stretch it further by another 5 cm is
a) 12.50 Nm
b) 18.75 Nm
c) 25.00 Nm
d) 6.25 Nm

5. Rotational Motion  Quiz
1. A particle of mass m moves along line PC with velocity v as shown. What is the angular momentum of the particle about O?
a) mvL
b) mvl
c) mvr
d) zero
2. A particle performing uniform circular motion has angular momentum L. If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is
a) $\frac{L}{4}$
b) 2 L
c) 4 L
d) $\frac{L}{2}$

6. Gravitation  Quiz
1. The time period of a satellite of earth is 5 h. If the separation between the earth and the satellite is increased to 4 times the previous value, the new time period will become
a) 10 h
b) 80 h
c) 40 h
d) 20 h
2. The time period of an earth satellite in circular orbit is independent of
a) The mass of the satellite
b) Radius of its orbit
c) Both the mass and radius of the orbit
d) Neither the mass of the satellite nor the radius of its orbit

7. Properties of Solids and Liquids  Quiz
1. Heat given to a body which raises its temperature by 1^{0} C is
a) Water equivalent
b) Thermal capacity
c) Specific heat
d) Temperature gradient
2. If the temperature of the sun were to increases from T to 2T and its radius from R to 2R , then the ratio of the radiant energy received on earth to what it was previously, will be
a) 4
b) 16
c) 32
d) 64

8. Thermodynamics  Quiz
1. Heat cannot be itself flow from a body at lower temperature to a body a higher temperature is a statement or consequence of
a) Second law of thermodynamics
b) Conservation of momentum
c) Conservation of mass
d) First law of thermodynamics
2. The work done on the gas in taking it from D to A is
a) 414 R
b) + 414 R
c)  690 R
d) + 690 R

9. Kinetic Theory of Gases  Quiz
1. One kg of a diatomic gas is at a pressure of 8 × 10^{4} Nm^{2} . The density of the gas is 4 kgm^{3}. What is the energy of the gas due to its thermal motion?
a) 3 × 10^{4} J
b) 5 × 10^{4} J
c) 6 × 10^{4} J
d) 7 × 10^{4} J
2. One mole of ideal monoatomic gas $\left ( \gamma = \frac{5}{3} \right )$ is mixed with one mole of diatomic gas $\left ( \gamma = \frac{7}{5} \right )$. What is γ for the mixture ? γ denotes the ratio of specific heat at constant pressure, to that at constant volume
a) $\frac{3}{2}$
b) $\frac{23}{15}$
c) $\frac{35}{23}$
d) $\frac{4}{3}$

10. Oscillations and Waves  Quiz
1. Two simple hgarmonic motions are represented by the equation y1 = 0.1 sin$(100\pi+ \frac{\pi}{3})$ and y2= 0.1 cos $\pi$t. The phase differnce of the velocity of particle 1, with respect to the velocity of particle 2 is
a) $\frac{\pi}{6}$
b) $\frac{\pi}{3}$
c) $\frac{\pi}{3}$
d) $\frac{\pi}{6}$
2. A particle at the end of a spring executes simple harmonic motion with a period t_{1}, while the corresponding period for another spring is t_{2}. If the period of oscillation with the two springs in series is T, then
a) T = t_{1} + t_{2}
b) $T^{2} = t_{1}^{2} + t_{2}^{2}$
c) $T^{1}$ = $t_{1}^{1} + t_{2}^{1}$
d) $T^{2}$ = $t_{1}^{2} + t_{2}^{2}$

11. Electrostatics  Quiz
1. Let p(r) = $\frac{Q}{\pi R^{4}}r$ be the charge density distribution for a solid sphere of radius R and total charge Q. For a point P inside the sphere at distance r_{1} from the centre of the sphere the magnitude of electric field is
a) zero
b) $\frac{Q}{4\pi \epsilon_{0}r_{1}^{2}}$
c) $\frac{Qr_{1}^{2}}{4\pi \epsilon_{0}R^{4}}$
d) $\frac{Qr_{1}^{2}}{3\pi \epsilon_{0}R^{4}}$
2. Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance d(d < <1) apart because of their mutual repulsion. The charge begins to leak from both the spheres at a constant rate. As a result charges approach each other with a velocity v. Then as a function of distance x between them,
a) v ∝ x^{1}
b) v ∝ x^{1/2}
c) v ∝ x
d) v ∝ x^{1/2}

12. Current Electricity  Quiz
1. The resistance of a bulb filament is 100Ω at a temperature of 100^{0}C. If its temperature coefficient of resistance be 0.005 per^{0}C, its rtesistance will become 200Ω at a temperature of
a) 30^{0}C
b) 400^{0}C
c) 500^{0}C
d) 200^{0}C
2. This question contains Statement I and
StatementII . Of the four choices given after the statements, choose the one that best describes the two statements.
Statement I : The temperature dependence of resistance is usually given as R = R_{0}(1 + αΔt). The resistance of a wire changes from 100Ω to 150Ω when its temperature is increased from 27^{0}C to 227^{0}C. This implies that α = 2.5 x 10^{3}/^{0}C.
Statement II : R = R_{i}(1 + αΔT) is valid only when the change in the temperature ΔT is small and ΔR = (R  R_{0}) << R_{0}.
a) Statement I is true, Statement II is false.
b) Statement I is true, Statement II is true; Statement II is the correct explanation of Statement I.
c) Statement I is true, Statement II is true; Statement II is not the correct explanation of Statement I.
d) Statement I is false, Statement II is true.

13. Magnetic Effects of Current and Magnetism  Quiz
1. A charged particle moves through a magnetic field perpendicular to its direction. Then
a) the momentum changes but the kinetic energy is constant
b) both momentum and kinetic energy of the particle are not constant
c) both momentum and kinetic energy of the particle are constant
d) kinetic energy changes but the momentum is constant
2. The magnitude of the magnetic field (B) due to loop ABCD at the origin (O) is
a) zero
b) $\frac{\mu_{0}\left (b  a \right )}{24ab}$
c) $\frac{\mu_{0}I}{4\pi} \left [\frac{b  a}{ab} \right ]$
d) $\frac{\mu_{0}I}{4\pi}\left [2\left (b  a \right ) + \frac{\pi}{3}\left (a + b \right ) \right ]$

14. Electromagnetic Induction and Alternating Current  Quiz
1. In a transformer, number of turns in the primary are 140 and that in the secondary are 280. If current in primary is 4A, then that in the secondary is
a) 04:00 am
b) 02:00 am
c) 06:00 am
d) 10:00 am
2. In a series resonant LCR circuit , the voltage across is 100V and R = 1kΩ with C = 2μF. The resonant frequency ω is 200rad/s. At resonance frequency ω is 200 rad/s. At resonance the voltage across L is
a) 2.5 x 10^{2} V
b) 40 V
c) 250V
d) 4 x 10^{3}V

15. Electromagnetic Waves  Quiz
1. A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is
a) $\frac{E}{c}$
b) $\frac{2E}{c}$
c) Ec
d) $\frac{E}{c^{2}}$
2. Which of the following radiations has the least wavelength?
a) γrays
b) βrays
c) αrays
d) Xrays

16. Optics  Quiz
1. An astronomical telescope has a large aperture to
a) reduce spherical aberration
b) have high resolution
c) increase span of observation
d) have low dispersion
2. Statement I On viewing the clear blue portion of the sky through a Calcite crystal, the intensity of transmitted light varies as the crystal is rotated .Statement II The light coming from the sky is polarized due to scattering of sun light by particles in the atmosphere. The scattering is largest for blue light.
a) Statement I is false, Statement II is true
b) Statement I is true, Statement II is false
c) Statement I is true, Statement II is true, Statement II is the correct explanation of statement I
d) Statement I is true, Statement II is true; Statement II is not correct explanation of statement I

17. Dual Nature of Matter and Radiation  Quiz
1. A photocell is illuminated by a small bright source placed 1 m away . When the same source of light is placed $\frac{1}{2}$ away, the number of electrons emitted by photocathode would
a) decrease by a factor of 4
b) increase by a factor of 4
c) decrease by a factor of 2
d) increase by a factor of 2
2. The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV and the stopping potential for a radiation incident on this surface is 5V. The incident radiation lies in
a) Ultraviolet region
b) infrared region
c) visible region
d) Xray region

18. Atoms and Nuclei  Quiz
1. Which of the following cannot be emitted by radioactive substances during their decay?
a) Protons
b) Neutrons
c) Helium nuclei
d) Electrons
2. b) d)19. Electronic Devices  Quiz
1. The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm, is incident on it. The band in (eV) for the semiconductor is
a) 1.1 eV
b) 2.5 eV
c) 0.5 eV
d) 0.7 eV
2. When pn junction diode is forward biased, then
a) the depletion region is reduced and barrier height is increased
b) the depletion region is widened and barrier height is increased
c) both the depletion region and barrier height are reduced
d) both the depletion region and barrier height are increased

20. Communication Systems  Quiz
1. Consider telecommunication through optical fibres. Which of the following statements is not true?
a) Optical fibres can be graded refractive index
b) Optical fibres are subjected to electromagnetic interference from outside
c) Optical fibres have extremely low transmission loss
d) Optical fibres may have homogeneous core with a suitable cladding
2. The logic circuit shown below has the input waveforms A and B as shown. Pick out the correct output wavefrom.
a)
b)
c)
d)