Q.1. Consider the following regarding the differences between ‘holography’ and ‘photography’:
- When a photograph is cut in half, each piece shows half of the scene. When a hologram is cut in half, the whole scene can still be seen in each piece.
- A lens is required in photography to record the image, whereas in holography, the light from the object is scattered directly onto the recording medium.
Select the statement(s) which is/are correct?
[A] Only 1
[B] Only 2
[C] Both 1 and 2
[D] Neither 1 nor 2
Answer: C [Both 1 and 2]
Q.2. Electron microscope works on which of the following principles?
[A] Optical interference
[B] Wave Nature of electrons
[C] Motion of charged particle in electromagnetic fields
[D] Faraday’s law of Electromagnetic induction
Answer: B [Wave Nature of electrons]
Q.3. The capacity of a body to do work is known as:
[A] Energy
[B] Power
[C] Momentum
[D] Strength
Answer: A [Energy]
Q.4. What is the audible range of sound for human beings?
[A] 20 Hz to 2000 Hz
[B] 200 Hz to 20000 Hz
[C] 20 Hz to 20000 Hz
[D] 2000 Hz to 20000 Hz
Answer: C [20 Hz to 20000 Hz]
Q.5. In which of the following cases a concave mirror will form a virtual and erect image?
[A] when object is placed at infinity
[B] when object is at focus
[C] when object is between pole and focus
[D] None of the above
Answer: C [when object is between pole and focus]
Q.6. Which of the following is / are correct statements with respect to the image formed in a plane mirror?
- Image is always virtual
- The distance of image from the mirror is same as the distance between object and mirror
- Image is laterally inverted
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Answer: D [ 1, 2 & 3]
Q.7. Which of the following is correct about the properties of Gravitational Forces?
[A] They are the strongest forces in nature
[B] They observe inverse square law
[C] Both a and b
[D] None
Answer: B [They observe inverse square law]
Q.8. On which of the following quantities, Work done does not depend?
[A] Force applied
[B] Displacement
[C] Time
[D] Depends on all of the above
Answer: C [Time]
Q.9. Which of the following is the cause of echo?
[A] When sound is absorbed
[B] When sound is transmitted
[C] When sound is reflected
[D] When sound is refracted
Answer: C [When sound is reflected]
Q.10. Which of the following are the cases of use of concave mirrors?
[A] Search-lights
[B] Shaving mirrors
[C] Solar furnaces
[D] All of the above
Answer: D [All of the above]
Q.11. With reference to Mirage, which among the following statements is / are correct?
- The refractive index of hot air is greater than cold air
- When light rays pass from hotter to cooler layers of air, they curve downward
- The phenomenon of Superior mirage is most commonly found in polar regions
Choose the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Answer: B [ Only 2 & 3]
Q.12. Which of the following is the largest practical unit of mass?
[A] Slug
[B] a.m.u
[C] Hyperkg
[D] C.S.L
Answer: D [ C.S.L ]
Q.13. Which of the following represents the dimensional formula of Universal Gravitational Constant?
[A] M1 L2 T-2
[B] M-1 L1 T-2
[C] M-1 L3 T-2
[D] M1 L3 T-2
Answer: C [M-1 L3 T-2]
Q.14. What is a perfectly black body?
[A] A body which absorbs all the radiations incident on it
[B] A body which has zero coefficient of linear expansion
[C] A body which has zero absorptive power
[D] A body painted black on all sides
Answer: A [A body which absorbs all the radiations incident on it]
Q.15. On which of the following does the resistance of a conductor depend?
[A] Length
[B] Area of cross-section
[C] Nature of material
[D] All of the above
Answer: D [All of the above ]
Q.16. Which among the following keep changing for a body in uniform circular motion?
- Speed
- Amplitude
- Velocity
- Acceleration
Choose the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 3 & 4
[D] Only 1 & 4
Answer: C [ Only 3 & 4]
Q.17. Which of the following units is the smallest in terms of length?
[A] micron
[B] nanometer
[C] fermi
[D] angstrom
Answer: C [ fermi ]
Q.18. What will be the effect on the value of acceleration due to gravity at the poles if the rate of rotation of earth increases?
[A] No effect
[B] it will increase
[C] it will decrease
[D] it will become zero
Answer: A [No effect]
Q.19. Which of the following is true about an ideal gas, if Cp =molar specific heat capacities at constant pressure, Cp= molar specific heat capacities at constant volume and R is the universal gas constant?
[A] Cp + Cv = R
[B] Cp/ Cv = R
[C] Cp – Cv = R
[D] None of the above
Answer: C [Cp – Cv = R]
Q.20. What do we call the cell that converts the potential energy from a fuel into electricity?
[A] Electrolytic cell
[B] Galvanic cell
[C] Dry cell
[D] Fuel cell
Answer: D [Fuel cell]
Q.21. Consider the following statements:
- A body at rest has no inertia
- A body in free fall in vacuum has constant acceleration
- A body in free fall in vacuum has diminishing kinetic energy
Which among the above is / are correct statements?
[A] Only 1 & 2
[B] Only 2
[C] Only 2 & 3
[D] 1, 2 & 3
Answer: B [ Only 2]
Q.22. Which of these pairs has the same unit of measurement?
[A] Rate of flow and Acceleration
[B] Impulse and Moment of Force
[C] Rydberg constant and Gas constant
[D] Pressure and Coefficient of Elasticity
Answer: D [ Pressure and Coefficient of Elasticity ]
Q.23. Which of the following has an effect on the value of acceleration due to gravity?
[A] Shape of the earth
[B] Height above the earth surface
[C] Axial rotation of the earth
[D] All of the above
Answer: D [All of the above]
Q.24. What do we call the phenomenon of light being deflected when travelling obliquely from one medium to another?
[A] Refraction
[B] Reflection
[C] Dispersion
[D] Convergence
Answer: A [Refraction]
Q.25. What is the SI unit of magnetic flux?
[A] teslas
[B] maxwell
[C] weber
[D] Newton
Answer: C [weber]