Physics Questions And Answers

85. An object is kept 5 cm in front of a concave mirror of focal length 15 cm. What will be the nature of the image ?
a. virtual, not magnified 
b. virtual, magnified 
c. real not magnified 
d. real magnified

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Answer: virtual, magnified


86. Which one is a scalar quantity?
a. Acceleration
b. Displacement
c. Speed
d. Velocity

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ANSWER: c.Speed


87. The total energy of an electron in any atom is
a. zero
b. negative
c. positive
d. infinite

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ANSWER : : negative


88. Which one of the following remains constant while throwing a ball upward?  
A.  Displacement
B.  Kinectic energy
C.  Acceleration
D.  Velocity

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Answer : C.  Acceleration


89. Which Instrument is used to measure depth of ocean?
A. Endoscope                    
B. Ammeter                       
C. Fathometer                   
D. Anemometer   
           
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Ans. C


90. The nuclear force is -
1. Short range repulsive force
2. Short range attractive force
3. Long range repulsive force
4. Long range attractive force

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Ans: 2


91. Who is the father of discoveries?
A. Edison
B. Pascal
C. Einstein
D. Archimedes

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Answer: D. Archimedes



92. The speed of light will be minimum while passing through
A. water
B. vaccum
C. air
D. glass

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Answer: D. glass



93. Which one among the following radiations carries maximum energy?  
A.  Ultraviolet rays
B.  Gamma rays
C.  X- rays
D.  Infra red rays

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Answer : B.  Gamma ray


94. The sunlight from sun to Earth reaches in -
A.  5 minutes
B.  6 minutes
C.  8 minutes
D.  10 minutes

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Answer : C.  8 minutes



95. What type of lens is a magnifying glass?   Add Question to Review List
a. Plano-Concave
b. Concave
c. Convex 
d. Plane Glass

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Answer: c. Convex 



96. To attain maximum range, the projectile must be launched at an angle of?
a.   90°
b.   45°
c.   0°
d.   60°

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Answer: b.   45°


97. What is the name of the instrument that measures and records the relative humidity of the air ? 
a. hygroscope
b. hygrograph
c. hygrometer
d. hygrister

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Answer: c. hygrometer




98.How can boilng point of a liquid be reduced ? 
a. by adding a solid of lower melting point 
b. by dissolving a soluble solid in it 
c. by increasing the pressure on the liquid d.by decreasing the pressure on the liquid

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Answer: by decreasing the pressure on the liquid



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