Q.1:- Distance of stars measured in ?
- Galactic Unit
- Seller Mile
- Cosmic Kilometre
- Light Year
Ans:- (d) Light Year
Q.2:- Water drops do not stick to the oily surface due to ?
- Lack of adhesive force
- Surface tension
- Cannot mix each other
- Water is lighter than oil
Ans:- (a) Lack of adhesive force
Q.3:- A bullet hits and gets embedded in a solid block resting on a horizontal frictionless table. Which physical quantity is conserved in this process ?
- Momentum and kinetic energy
- Momentum alone
- Kinetic energy alone
- Neither momentum nor kinetic energy
Ans:- (b) Momentum alone
Q.4:- A liquid drop attains spherical shape due to ?
- Surface tension
- Viscosity
- Upward thrust
- Gravitation
Ans:- (a) Surface tension
Q.5:- The product of the pressure and volume of an ideal gas is ?
- A constant
- Approximately equal to the universal gas constant
- Directly proportional to its temp
- Inversely proportional to its temp
Ans:- (c) Directly proportional to its temp
Q.6:- A metal sheet with circular hole is heated. The hole will ?
- Contract
- Expand
- Remain unaffected
- None of these
Ans:- (b) Expand
Q.7:- Decibel is a ?
- Musical Note
- Musical Instrument
- Unit of Intensity
- None of the above
Ans:- (c) Unit of Intensity
Q.8:- If the mass of the pendulum is doubled, the time period ?
- Becomes double
- Becomes half
- Becomes four times
- Remains same
Ans:- (d) Remains same
Q.9:- With the rise of temperature, the speed of sound in a gas ?
- Increases
- Decreases
- Remains the same
- None of these
Ans:- (a) Increases
Q.10:- The loudness of sound depends upon ?
- Velocity
- Pitch
- Amplitude
- Wavelength
Ans:- (c) Amplitude
Q.11:- Different objects at different distances are seen by the eye. The parameter that remain constant is ?
- The focal length of the eye lens
- The object distance from the eye lens
- The radii of curvature of the eye lens
- The image distance from the eye lens
Ans:- (d) The image distance from the eye lens
Q.12:- In the human eye, the focussing is done by ?
- To and fro movement of the eye lens
- To and fro movement of the retina
- Change in the convexity of the eye lens
- Change in the refractive index of the eye fluids
Ans:- (c) Change in the convexity of the eye lens
Q.13:- The chemical part of the dye that absorbs light and produces colour is called ?
- Neon
- A Chromophore
- A Photochrome
- A Pigment
Ans:- (d) A Pigment
Q.14:- Diffusion of light in the atmosphere takes place due to ?
- Carbon dioxide
- Dust particles
- Helium
- Water vapours
Ans:- (b) Dust particles
Q.15:- An air bubble in water will act like a ?
- Convex mirror
- Convex lens
- Concave mirror
- Concave lens
Ans:- (d) Concave lens
Q.16:- Light from the Sun reaches upon in nearly ?
- 8 min
- 2 min
- 6 min
- 4 min
Ans:- (a) 8 min
Q.17:- A plant with green leaves placed in red light will appear ?
- Green
- Violet
- Black
- Red
Ans:- (c) Black
Q.18:- Optic fibres are mainly used for which of the following ?
- Musical instruments
- Food industry
- Weaving
- Communication
Ans:- (d) Communication
Q.19:- Kirchhoff’s voltage law is based on the law of conservation of ?
- Momentum
- Charge
- Mass
- Energy
Ans:- (d) Energy
Q.20:- Electric current is measured using which of the following instrument ?
- Anemometer
- Ammeter
- Voltmeter
- Wattmeter
Ans:- (b) Ammeter
Q.21:- Tangent galvanometer is used to measure ?
- Steady currents
- Currents impulses
- Earth’s magnetic field
- None of these
Ans:- (a) Steady currents
Q.22:- A magnetic needle is kept in non-uniform magnetic field. It experiences ?
- A force and a torque
- A force but not a torque
- A torque but not a force
- None of these
Ans:- (a) A force and a torque
Q.23:- Fleming’s right hand rule gives ?
- The magnitude of the induced emf
- The magnitude of the magnetic field
- The direction of the induced emf
- None of these
Ans:- (c) The direction of the induced emf
Q.24:- Good conductors have many loosely bound ?
- Protons
- Neutrons
- Atoms
- Electrons
Ans:- (d) Electrons
Q.25:- In electric supply lines in India, which parameter is kept constant ?
- Voltage
- Current
- Frequency
- Power
Ans:- (c) Frequency
