Physics-Objective Related Question Answers
1026. The unit of electromagnetic radiants having a certain wavelength and a definite amount of energy is?
Photon
1027. What is directly proportional to the energy of a photon?
Frequency
1028. Shadows have fuzzy uneven edges because of?
Diffraction
1029. Newton postulated his corpuscular theory of light on the basis of?
Rectilinear propagation of light
1030. How is the temperature of the sun measured?
Pyrometer
1031. The magnifying power of a simple microscope can be increased if we use eye piece of?
Smaller focal length
1032. Large aperture of telescope are used for?
Greater resolution
1033. The image of a distant object as seen through an astronomical telescope is?
Inverted
1034. For the rear view, motorists use?
convex mirror
1035. A man cannot see objects distinctly at a distance less than one metre. He is suffering from?
Hypermetropia
1036. The disease of astigmatism in human eye is because of?
Unequal and uneven curvature of eye lens
1037. The ability of eye to focus the near as well as distant object is called?
Power of accommodation
1038. To remove hypermetropia lens used is?
Convex
1039. A short sighted person uses spectacles fitted with?
Concave lenses
1040. A cylindrical lens is required to correct?
Astigmatism
1041. The shortest distance of clear vision is?
25cm
1042. The lens in the human eye?
convex
1043. Flow of electrically charged particles is?
Electric current
1044. Charge flowing in one seond?
Intensity of electric current
1045. Any substance which can offer resistance to the flow of electrons is called a?
Resistor
1046. Name the instrument that converts electrical signals into sound signals?
Loud Speaker
1047. Which instrument is used to change the direction of the flow of current?
Commutator
1048. What is the voltage in house supplyline?
230 volts (AC)
1049. Which is the principal element used in the production of solar cell?
Silicon
1050. Which instrument converts electrical energy into light energy?
Electric lamp
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