Q.1:- Which one among the following components is used as an amplifying device ?
- Transformer
- Diode
- Capacitor
- Transistor
Q.2:- Where do the electrical charges reside in a charted conductor ?
- At the core
- Throughout the body
- Depended upon the nature of the body
- Outer surface of the body
Q.3:- Purpose of an optical filter is to ?
- Reflect lights of different colours
- Dispense light into component colours
- Refract light of different colours
- Transmit or absorb light of different colours
Q.4:- Curie is an unit of ?
- Radioactivity
- Energy of Gamma Rays
- Intensity of Gamma Rays
- Work Function
Q.5:- If there were no gravity, which of the following will not be there for a fluid ?
- Viscosity
- Surface Tension
- Pressure
- Upward Thrust
Q.6:- Which of the following has the lowest frequency ?
- Visible light
- Gamma Rays
- X-Rays
- Ultra Violet Rays
Q.7:- The solar energy produced by ?
- Fusion reaction
- Fission reaction
- Combustion reaction
- None
Q.8:- Which of the following waves cannot be polarised ?
- Radio
- Ultra Violet
- Infrared
- Ultrasonic
Q.9:- A galvanometer can be converted to a voltmeter by connecting ?
- A high resistance in parallel
- A high resistance in series
- A low resistance in series
- A low resistance in parallel
Q.10:- At hill stations, the boiling point of water will be ?
- Same as at sea level
- Less than that at sea level
- More than that at sea level
- Equal to the melting point of ice
Q.11:- The amount of matter in a ball of steel is its ?
- Weight
- Mass
- Density
- Volume
Q.12:- On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because :
- Mercury is a metal
- Density of mercury is greater than that of water
- Cohesion of mercury is greater than its adhesion with glass
- Cohesion of water is greater than its adhesion with glass
Q.13:- Why does ice covered in sawdust not melt quickly ?
- Sawdust does not allow the air to touch the ice
- The water is absorbed by sawdust
- Sawdust is a bad conductor of heat
- Sawdust is good conductor of heat
Q.14:- The material used in electric heater is ?
- Tungsten
- Nichrome
- Brass
- Steel
Q.15:- The point where total mass of a body is supposed to be concentrated is known as ?
- Dead Centre
- Centre of Mass
- Centre of Gravity
- Centre of Motion
Q.16:- What is the phenomenon which established the transverse nature of light ?
- Reflection
- Interference
- Diffraction
- Polarisation
Q.17:- The commonly used coolant in refrigerator is ?
- Ammonia
- Nitrogen
- Freon
- Oxygen
Q.18:- The sky appears blue due to ?
- Rayleigh Scattering
- Mie Scattering
- Back Scattering
- None of the above
Q.19:- The device used to convert solar energy into electricity is ?
- Photovoltaic cell
- Daniell cell
- Electrochemical cell
- Galvanic Cell
Q.20:- The word ‘isolation’ means ?
- Matters which insulate
- Incoming solar radiation
- Insoluble matters
- None of the above
Q.21:- Which of these waves can be polarized ?
- Sound waves in air
- Longitudinal waves on a string
- Transverse waves on a string
- Light waves
Q.22:- Loudness of sound depends on ?
- Frequency
- Wavelength
- Amplitude
- Pitch
Q.23:- An electron microscope gives higher magnifications than an optical microscope because ?
- The velocity of electrons is smaller than that of light
- The wavelength of electrons is smaller as compared to the wavelength of visible light
- The electrons have more energy than the light particulars
- The electron microscope uses more powerful lenses
Q.24:- Which one of the following is a non-dimensional quantity ?
- Gas Constant
- Strain
- Co-efficient of viscosity
- Plank’s constant
Q.25:- Blowing air with open pipe is an example of ?
- Isothermal process
- Isochoric process
- Isobaric process
- Adiabatic process
