Physics Questions And Answers 182-195

182. ‘An object at rest stays at rest and object in motion stays in motion with the same speed and in the same direction 
unless acted upon by an unbalanced force.’ This is which law of Newton?
a. First law of motion
b. Second law of motion
c. Third law of motion
d. None of the above

Cover the Answer
ANSWER: a. First law of motion


183. Which of the following series of hydrogen spectral lines occurs in the ultraviolet region
a. Bracket series
b. Pfund series
c. Balmer series
d. Lyman series

Cover the Answer
ANSWER : : Lyman series


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


Cover the Answer
Answer : B.  Gamma rays



185. Which of the following is attracted by a magnet?
a. Rubber
b. Leather
c. Iron 
d. Glass

Cover the Answer
Answer : c   Iron



186. What is the unit for specific resistance?
A.  Ohm / cm
B.  Ohm – cm2
C.  Ohm – cm
D.  Ohm

Cover the Answer
Answer : C.  Ohm – cm



187. The total flight requires a time that is?
a.   four times the time necessary to reach the maximum height.
b.   thrice the time necessary to reach the maximum height
c.   twice the time necessary to reach the maximum height
d.   equal to the time necessary to reach the maximum height.

Cover the Answer
Answer :  twice the time necessary to reach the maximum height



188. The underwater analogue of microphone is: 
a. sonobuoy
b. megaphone
c. hydrophone
d. acoustic tropedo

Cover the Answer
Answer : c. hydrophone


189. _____ Instrument is used for measuring sound under water?
A. Hygrometer                  
B. Hygroscope                   
C. Hypsometer                  
D. Hydrophone

Cover the Answer
Ans. D



190. Which two colours can be mixed to make green?
1. Yellow and Balck
2. Yellow and Blue
3. Orange and Violet
4. Purple and Yellow


Cover the Answer
Ans: 2




191. Which instrument is used to measure curvature of spherical objects ?
a. Spectroscope
b. Spherometer
c. Spectrometer
d. Sextant

Cover the Answer
Answer: Option B
Explanation:
Spectroscope - used to record spectra,
Spectrometer - used to measure the position of spectral lines,
Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude. what you 
thought :)



192. Dc current can be controlled by which one of the following components?  
A. Impedance
B. Resistance
C. Capacitance
D. Inductance

Cover the Answer
Answer : B. Resistance




193. Light year is a unit of
A. time
B. distance
C. light
D. intensity of light

Cover the Answer
Answer: B




194. Which of the following is not the unit of time
A) Parallactic second
B) Micro Second
C) Leap year
D) Solar day

Cover the Answer
Answer: A) Parallactic second




195.  Which one of the following is the unit of activity of a radioactive source?
A. Siemens
B. Lux
C. Tesla
D. Becquerrel

Cover the Answer
Answer: D. Becquerrel