Physics Questions And Answers 196 - 206

196. What do you understand by inertia?
a. Ability of a substance to transfer heart energy to another physical system
b. Phenomenon observed whenever the source of waves is moving with respect to an observer
c. Tendency to resist changes in their state of motion
d. None of the above

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ANSWER: c. Tendency to resist changes in their state of motion


197. The potential energy of an electron in a given orbit is
a. equal to its kinetic energy
b. one half of its kinetic energy
c. twice its kinetic energy
d. twice its kinetic energy but negative

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ANSWER : : twice its kinetic energy but negative



198. The Central Arid Zone Research Institute (CAZRI) is located at  
A.  Jaipur
B.  Jodhpur
C.  Jaisalmer
D.  Jallandhar

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Answer : B.  Jodhpur



199. How much heat is required to raise the temperature of 1g of water by 1 oC.  
a. 100 Calories
b. 1 Joule
c. 1 Calorie 
d. 100 Joules

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Answer : 1 Calorie



200.  Lux is the SI unit of -
A.  Intensity of illumination
B.  Luminous efficiency
C.  Luminous flux
D.  Luminous intensity

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Answer : A.  Intensity of illumination



201. For one complete revolution θ =?
a.   360°
b.   90°
c.   180°
d.   45°

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Answer : a.   360°



202. Which of the following is most suitable for measuring very high temperatures ? 
a. thermocouple
b. pyrometer
c. thermoelectric thermometer
d. platinum resistance thermometer

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Answer : b. pyrometer


203. What is the unit for electric charge?
A. Ampere                          
B. Coulomb                         
D. Newton                          
D. Volt

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Ans. B


204. The conduction current in a chemical cell is -
1. By Positive and negative ions
2. By Positive ions
3. By Negative ions
4. By Positive Holes

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Ans: 3



205. Which instrument is used to record physical happenings at a distant place ?
a. Thermostat
b. Tonometer
c. Telemeter
d. Transponder

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Answer: Option C
Explanation:
Thermostat - is used to regulate the temperature at a particular point.
Tonometer - is used to measure the pitch of a sound,
Transponder - is used to receive a signal and transmit a reply immediately.



206. Mesons are found in  
A.  Alpha -rays
B.  Laser beam
C.  X – rays
D.  Cosmic rays

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Answer : D.  Cosmic rays



207. Mirage is due to
A. unequal heating of different parts of the atmosphere
B. magnetic disturbances in the atmosphere
C. depletion of ozone layer in the atmosphere
D. equal heating of different parts of the atmosphere

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Answer: A


208. Masses of stars and galaxies are usually expressed in terms of
A) neutron mass
B) earth's mass
C) solar mass
D) lunar mass

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Answer: C) solar mass 



209. Which one of the following common devices works on the basis of the principle of mutual induction?
A. LED
B. Transformer
C. Photodiode
D. Tube light

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Answer : B. Transformer