## Class/Course - Medical Entrance

### Subject - Physics

#### Total Number of Question/s - 3470

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• 1. Physical World and Measurement - Quiz

1. In a vernier callipers N divisions of vernier scale coincide with N -1 divisions of main scale (in which length of one division is 1mm). The least count of the instrument should be
a) N
b) N-1
c) $\frac{1}{10N}$
d) $\frac{1}{(N-1)}$

2. Plancks constant has the dimensions of
a) linear momentum
b) angular momentum
c) energy
d) power

• 2. Motion in One Dimension - Quiz

1. A particle shows distance -time curves as given in this figure. The maximum instantaneous velocity of the particle is around the point

a) B
b) C
c) D
d) A

2. A car covers the first-half of the distance between two places at 40 km/h and other half at 60 km/h. The average speed of the car is
a) 40 km/h
b) 48 km/h
c) 50 km/h
d) 60 km/h

• 3. Motion in Two and Three Dimension - Quiz

1. $\vec{A} \ and \ \vec{B}$ are two vectors vectors and θ is the angle between them, if $|\vec{A} \times \vec{B}| = \sqrt{3}(\vec{A}.\vec{B})$ the value of θ is
a) 600
b) 450
c) 300
d) 900

2. The circular motion of a particle with comstant speed is
a) simple harmonic but not periodic
b) periodic and simple harmonic
c) neither periodic nor simple harmonic
d) periodic but not simple harmonic

• 4. Laws of Motion - Quiz

1. A block of mass 10 kg is placed on arough horizontal surface having coefficient of friction μ = 0.5. If a horizontal force of 100N is applied on it, then the acceleration of the block will be (g = 10 m/s2)
a) 15 m/s2
b) 10 m/s2
c) 5 m/s2
d) 0.5 m/s2

2. A lift of mass 1000 kg is moving upwards with an acceleration of 1m/s2 . The tension developed in the string, which is connected to lift is (g = 9.8 m/s2)
a) 9800 N
b) 10800N
c) 11000N
d) 10000N

• 5. Work, Energy and Power - Quiz

1. Sand is being dropped on a conveyor belt at the rate of m kg/s . The force necessary to keep the belt moving with a constant velocity of v m/s will be
a) Mv newton
b) 2 Mv newton
c) $\frac{Mv}{2} \ newton$
d) zero

2. A child is swinging a awing . Minimum and maximum heights of swing from earths surface  are 0.75 m and 2m respectively. The maximum velocity of this swing is
a) 5 m/s
b) 10 m/s
c) 15 m/s
d) 20 m/s

• 6. Rotational Motion - Quiz

1. A round disc of moment of inertia Iabout its axis perpendicular to its plane and passing through its centre is placed over another disc  of moment of inertia Irotating with an angular velocity ω  about the same axis . The final angular velocity of the combination of discs is
a) $\frac{I_{2} \omega}{I_{1} + I_{2}}$
b) ω
c) $\frac{I_{1} \omega}{I_{1} + I_{2}}$
d) $\frac{(I_{1} + I_{2})\omega}{I_{1}}$

2. A wheel of bicycle is rolling without slipping on a level road. The velocity of the centre of mass is vcm, then true statement is

a) The velocity of point A is 2vCM and velocity of point B zero
b) The velocity of point A is zero and velocity of point B is 2vCM
c) The velocity of point A is 2vCM and velocity of point B is -vCM
d) The velocities of both A and B are vCM

• 7. Gravitation - Quiz

1. The largest and the shortest distance of the earth from the sun are r1 and r2 . Its distance from the sun when it is perpendicular to the major axis of the orbit drawn from the sun
a) $\frac{r_{1} + r_{2}}{4}$
b) $\frac{r_{1} + r_{2}}{r_{1} - r_{2}}$
c) $\frac{2r_{1}r_{2}}{r_{1} + r_{2}}$
d) $\frac{r_{1} + r_{2}}{3}$

2. For a satellite moving is an orbit around the earth, the ratio of kinetic energy to potential energy is
a) 2
b) 1/2
c) $\frac{1}{\sqrt{2}}$
d) √2

• 8. Heat and Thermodynamics - Quiz

1. If Cs be the velocity of sound in air and c be the rms velocity , then
a) Cs < C
b) Cs = C
c) Cs = $c\left ( \frac{\gamma}{3} \right )^{1/2}$
d) None of the above

2. One mole of an ideal gas requires 207J heat to rise the temperature by 10K when heated at constant volume to raise the temperature by the same 10K, the heat required is (Given the gas constant R = 8.3J/mol-K)
a) 198.7J
b) 29J
c) 215.3J
d) 124J

• 9. Oscillations - Quiz

1. A point performs simple harmonic oscillation of period T and the equation of motion is given by x = $a \ sin \ \omega t\left (\omega t + \frac{\pi}{6}\right )$ . After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?
a) $\frac{T}{8}$
b) $\frac{T}{6}$
c) $\frac{T}{3}$
d) $\frac{T}{12}$

2. The time period of a simple pendulum is 2s. If its length is increased by 4times, then its period becomes
a) 16s
b) 12s
c) 8s
d) 4s

• 10. Waves - Quiz

1. The equation of a sound wave is given as y = 0.005 sin(62.4x + 316t). The wavelength of this wave is
a) 0.4 unit
b) 0.3 unit
c) 0.2 unit
d) 0.1 unit

2. If the amplitude of sound is doubled and the frequency reduced to one -fourth, the intensity of sound at the same point will
a) increase by a factor of 2
b) decrease by a factor of 2
c) decrease by a factor of 4
d) remains unchanged

• 11. Electrostatics - Quiz

1. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance plates of the capacitor is increased using an insulating hanfle. As a result the potential difference between the plates
a) decreases
b) does not change
c) becomes zero
d) increases

2. The formation of a dipole is due to two equal and dissimilar point charges placed at a
a) short distance
b) long distance
c) above each other
d) none of the above

• 12. Current Electricity - Quiz

1. A wire of resistance 12Ωm-1 is bent to form a complete circle of radius 10 cm. The resistance between its two diameterically opposite points, A and B as shown in the figure, is

a) 0.6 π Ω
b) 3Ω
c) 6πΩ
d) 6Ω

2. Potentiometer measures the potential difference more accurately than a voltmeter because
a) it has a wire of high resistance
b) it has a wire of low resistance
c) it does not draw current from external circuit
d) it draws a heavy current from external circuit

• 13. Thermal and Chemical Effects of Current - Quiz

1. An electric kettle has two heating coil. When one of the coils is connected to an AC source, the water in the kettle boils in 10min. When the other coil is used the water boils in 40 min . If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be
a) 25 min
b) 15 min
c) 8 min
d) 4 min

2. The temperature of inversion of a thermocouple is 6200C and the neutral temperature is 3000C. What is the temperature of cold junction?
a) 200C
b) 3200C
c) -200C
d) 400C

• 14. Magnetic Effects of Current - Quiz

1. If a long hollow copper pipe carries a current, then magnetic field is produced
a) inside the pipe only
b) outside the pipe only
c) both inside and outside the pipe
d) no where

2. A closed loop PQRS carrying is placed in a uniform magnetic field . If the magnetic forces on segments PS, SR and RQ are F1 , F2 and F3 respectively and are in the plane of the paper and along the direction shown, the force on the segment QP is

a) F3 - F1 - F2
b) $\sqrt{\left (F_{3} - F_{1} \right )^{2} + F_{2}^{2}}$
c) $\sqrt{\left (F_{3} - F_{1} \right )^{2} - F_{2}^{2}}$
d) F3 - F1 -F2

• 15. Magnestism - Quiz

1. Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
a) paramagnetism
b) anti-ferromagnetism
c) no magnetic property
d) diamagnetism

2. If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by μd , μp and μf respectively , then
a) μd ≠ 0 and μf ≠ 0
b) μd  = 0 and μf ≠ 0
c) μd  = 0 and μP ≠ 0
d) μd ≠ 0 and μP = 0

• 16. Electromagnetic Induction - Quiz

1. A rectangular coil of 20 turns and area of cross section 25 sq cm has a resistance of 100 ω. If a magnetic field which is perpendicular to the plane of coil changes at a rate of 1000 T/s, the current in the coil is
a) 1A
b) 50A
c) 0.5 A
d) 5 A

2. A 100 mH coil carries a current of 1 A. Energy stored in its magnetic field is
a) 0.5 J
b) 1 A
c) 0.05 J
d) 5 A

• 17. AC and Electromagnetic Waves - Quiz

1. The electric field part of an electromagnetic wave in a medium is represented by
EX = 0,
Ey = $2.5\frac{N}{C}cos\left [\left (2\pi \times 10^{6 \frac{rad}{m}} \right )t - \left (\pi \times 10^{-2} \frac{rad}{s} \right )x\right ]$
Ez = 0. The wave is
a) moving along y direction with frequency 2π × 106 Hz and wavelength 200m.
b) moving along x direction with frequency 106 Hz and wavelength 100m
c) moving along x direction with frequency 106 Hz and wavelength 200 m
d) moving along -x direction with frequency 106 Hz and wavelength 200 m

2. The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux Φ linked with the primary coil is given by Φ = Φ0 + 4t, where Φ is in weber, t is time in second and Φ0 Is a constant, the output voltage across the secondary coil is
a) 90 V
b) 120 V
c) 230 V
d) 30 V

• 18. Ray Optics and Optical Instruments - Quiz

1. The frequency of a light wave in a material is 2 × 1014 Hz and wavelength is 5000 Å . The refractive index of material will be
a) 1.40
b) 1.50
c) 3.00
d) 1.33

2. A transparent cube contains a small air bubble. Its apparent distance is 2cm when seen through one face and 5 cm when through other face. If the refractive index of the material of the cube is 1.5 , the real length of the edge of cube must be
a) 7 cm
b) 7.5 cm
c) 10.5 cm
d) $\frac{14}{3}cm$

• 19. Electrons and Photons - Quiz

1. Gases begin to conduct electricity at low pressure because
a) at low pressures gases turn to plasma
b) colliding electrons can acquire higher kinetic energy due to increased mean free path leading to ionisation of atoms
c) atoms break up into electrons and protons
d) the electrons in atoms can move freely at low pressures

2. Photoelectric work function of a metal is 1 eV. light of wavelength λ = 3000Å falls on it. The photoelectric come out with velocity
a) 10 m/s
b) 102 m/s
c) 104m/s
d) 106m/s

• 20. Atomic Physics - Quiz

1. Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be
a) 3
b) 6
c) 5
d) 2

2. In the Bohrs model of a hyydrogen atom , the centripetal force is furnished by the coulomb attraction between the proton and the electron. If ais the radius of the ground state orbit, m is the mass and e is the charge on the electron,  ε0 is the vacuum permittivity , the speed of the electron is
a) zero
b) $\frac{e}{\sqrt{\varepsilon_{0}a_{0} m}}$
c) $\frac{e}{\sqrt{4\pi \varepsilon_{0}a_{o}m}}$
d) $\frac{\sqrt{4\pi \varepsilon_{0}a_{o}m}}{e}$

• 21. Nuclear Physics - Quiz

1. The nuclei 6C13 and 7N14 can be described as
a) isotones
b) isobars
c) isotopes of carbon
d) isotopes of nitrogen

2. An element A decays into element C by a two step process
A → B + 2He4
B → C + 2e-
Then
a) A and C are isotopes
b) A and C are isobars
c) A and B are isotopes
d) A and B are isobars

• 22. Solid and Semiconductors Devices - Quiz

1. If internal resistance of cell is negligible, then current flowing through the circuit is

a) $\frac{3}{50}A$
b) $\frac{5}{50}A$
c) $\frac{4}{50}A$
d) $\frac{2}{50}A$

2. Following diagram performs the logic function of

a) OR gate
b) AND gate
c) XOR gate
d) NAND gate