Q.1:- A wire of resistance R is cut into ‘n’ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be ?
- nR
- R/n
- n/R
- R/n2
Q.2:- The resistance of an ideal voltmeter is ?
- Zero
- Low
- Infinite
- High
Q.3:- A hole in p-type semiconductor is ?
- An excess electron
- A missing electron
- A missing atom
- A donor level
Q.4:- γ-ray consists of ?
- Meson Particles
- Neutrino particles
- Higg’s boson
- Electromagnetic waves
Q.5:- The important conclusion given by millikan’s experiment about the charge is ?
- Charge is never quantized
- Charge has no definite value
- Charge is quantized
- Charge on oil drop always increases
Q.6:- A zener diode is also a p-n junction diode. It can be used as / an ?
- Full wave rectifier
- AC Voltage regulator
- DC voltage regulator
- Half wave rectifier
Q.7:- The method of communication in which transmission can take place in both directions, but happens only in one direction at a time, is called ?
- Duplex
- Half Duplex
- Full Duplex
- Simplex
Q.8:- The audio signal ?
- Can be sent directly over the air for distance
- Cannot be sent directly over the air for large distance
- Possess very high frequency
- None of the above
Q.9:- If we want to calculate the pressure of a liquid at the bottom of vessel, the quantity which is not required to determine it, is ?
- Height of the liquid column
- Surface area of the bottom of the vessel
- Density of the liquid
- Acceleration due to gravity at the bottom of the vessel
Q.10:- A small and a large rain drops are falling through air ?
- The large drop moves faster
- The small drop moves faster
- Both moves with same speed
- None of the above
Q.11:- The relay satellite transmits the television programme continuously from one part of the world to another because its ?
- Period is greater than the period of rotation of the earth about its axis
- Period is less than the period of rotation of the earth about its axis
- Period to equal to the period of rotation of the earth about its axis
- Mass is less than the mass of the earth
Q.12:- A geostationary satellite should be launched such that it moves from ?
- North to south in the polar plane
- South to north in the polar plane
- East to west in the equatorial plane
- West to east in the equatorial plane
Q.13:- Gas thermometer are more sensitive than the liquid thermometers because the gases ?
- Have low specific heat
- Have high specific heat
- Have large coefficient of expansion
- Are lighter
Q.14:- A man in a train moving with a constant velocity drops a ball on the platform. The path of the ball as seem by an observer standing on the platform is ?
- A straight line
- A circle
- A parabola
- None
Q.15:- SI unit of Magnetic Flux is ?
- Weber/m
- Weber
- Weber-m2
- Weber-m4
Q.16:- On which of the following principles does a rocket work ?
- Conservation of momentum
- Conservation of Inertia
- Conservation of Mass
- Conservation of Energy
Q.17:- A spherical ball made of steel when dropped in a bucket full of mercury (Hg) will ?
- Sink to the bottom
- Float on the surface
- Will dissolve
- None
Q.18:- A refrigerator, with its power on, is kept in closed room with its door open. The temperature of the room will ?
- Rise
- Fall
- Remains the same
- None of these
Q.19:- Some quantity of water at room temperature is placed in an open pan and allowed to evaporate. After sometime the temperature of water ?
- Decreases slightly
- Increases slightly
- Remains unchanged
- None of these
Q.20:- The temperature at which the vapour pressure of a liquid become equal to the external (atmospheric) pressure is its ?
- Melting point
- Boiling point
- Inversion point
- None of these
Q.21:- An amount of heat required to raise the temperature of a body through 1k is called its ?
- Thermal capacity
- Entropy
- Specific heat
- Water equivalent
Q.22:- A person standing in front of a mirror finds his image thinner but with normal height. The mirror in question is ?
- Concave and spherical
- Convex and spherical
- Convex and cylindrical with axis vertical
- Convex and cylindrical with axis horizontal
Q.23:- Total internal reflection can take place when light travels from ?
- Diamond to glass
- Water to glass
- Air to water
- Air to glass
Q.24:- Optical fibres, though bent in any manner, allows light to pass through, What is the inference that one can draw from it ?
- The concept that light travels in straight path is wrong
- Light can flow through the optical fibres
- Light can travel through the fibres because of their ductility
- Light can travel through the fibres due to multiple total internal reflections
Q.25:- Optical fibre works on the principle of ?
- Refraction
- Scattering
- Interference
- Total internal reflection
