Physics Questions And Answers

112.A wave under goes reflection from a rigid boundary. One of its characteristic parameters that changes is
a. Frequency 
b. phase 
c. velocity 
d. wavelength

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Answer: phase


113. What does this statement define 
The rate of change of position in a fixed direction.
a. Velocity 
b. Speed
c. Acceleration
d. Momentum

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Answer: a. Velocity 


114. Which one of the following is an scalar quantity?
A.  Force
B.  Pressure
C.  Velocity
D.  Acceleration

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Answer: B. Pressure



115. Vectors are the quantities that are described by ____
a. Both magnitude & direction
b. Velocity
c. Magnitude
d. Direction

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ANSWER: a. Both magnitude & direction



116. For ionizing an excited hydrogen atom, the energy required in eV will be
a  little less than 13.6 eV
b. 13.6 eV
c. more than 13.6 eV
d. 3.4 eV or loss

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ANSWER : : 3.4 eV or loss


117. Zinc Oxide is  
A.  Acidic
B.  Basic
C.  Neutral
D.  Amphoteric

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Answer : D.  Amphoteric



118. Rate of change of distance is called?
A. Force                               
B. Pressure                         
C. Velocity                           
D. Speed

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Ans. D


119. Tides are primarily a result of the -
a. Attraction of the moon
b. Farrel's Law
c. Ocean currents
d. Pressure system of the earth

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Ans: a



120. The absorption of ink by blotting paper involves
A. viscosity of ink
B. capillary action phenomenon
C. diffusion of ink through the blotting
D. siphon action

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Answer: B



121. Which Instrument is used to measure the power of electric circuit?
A. Volt meter                     
B. Barograph                      
C. Watt meter                   
D. Wave meter

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Ans. C


122. Power of a lens is measured in
A. ultrasonic unit
B. decibel
C. dioptre
D. magnification

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Answer: C. dioptre


123. Formation of shadows can be explained by 
A) rectilinear propagation of light
B) reflection
C) refraction
D) total internal reflection

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Answer: A) rectilinear propagation of light



124. Recoil of a gun is an example of  
A.  Conservation of mass
B.  conservation of energy
C.  conservationofPE into KE
D.  conservation of linear momentum

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Answer : D.  conservation of linear momentum



125. Conductors have a _______ resistance.   
a. High
b. Low 
c. Unknown
d. Intermediate

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Answer : b. Low