physics MCQs – Page 8

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
141. Which one of the following materials is useful for making bulb filaments ?
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A. nichrome

B. tungsten

C. copper

D. constantan

142. In double slit experiment we observe _____________________?
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A. interference fringes only

B. diffraction fringes only

C. both interference and diffraction fringes

D. polirized frringes

143. Which one of the following properties of light does not change with the nature of the medium ?
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A. velocity

B. frequency

C. wavelength

D. amplitude

144. Sound waves do not travel in vacuum because ___________________?
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A. they are transverse waves

B. they require material medium for propagation

C. they do not have enough energy

D. they are stationary waves

145. Resistance of a super conductor is ______________________?
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A. infinite

B. changes with every conductor

C. zero

D. finite

146. Two sources of light are coherent if they emit rays of_______________?
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A. same wavelength

B. same wave length with constant phase difference

C. same amplitude and wavelength

D. same amplitude of vibration

147. Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
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A. Two

B. One

C. Four time

D. None of these

148. The most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science is_________?
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A. chemistry

B. biology

C. information technology

D. physics
149. A man is in a car is moving with velocity of 36km/hr. His speed with repect to the car is ____________________?
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A. zero

B. 36m/s

C. infinite

D. 10m/s

150. The periodic alternation of sound between maximum and minimum loudness are called___________________?
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A. silence zone

B. beats

C. resonance

D. interference

151. Crystals of a material can behave as_________________?
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A. Concave

B. Diffraction grating

C. Convex lens

D. Interferometer

152. A point source of light placed in a homogeneous medium gives rise to ___________________?
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A. a plane wave front

B. an elliptical wave front

C. a spherical wave front

D. a cylindrical wave front

153. Flight of a rocket in the space is an example of______________________?
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A. law of gravitation

B. second law of motion

C. first law of motion

D. third law of motion
154. All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?
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A. same current

B. different current and potential differences

C. same current and potential difference

D. different current but same potential difference
155. Photoelectric effect was given by ____________________?
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A. Einstein

B. Plank

C. Fresnel

D. Hertz

156. 2nd law of motion gives the definition of________________?
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A. force

B. acceleration

C. velocity

D. both force and acceleration

157. The force beared by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is__________________?
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A. none

B. 10 N

C. 100 N

D. 1 N
158. Diffraction effect is____________________?
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A. more for a round edge

B. less for a round edge

C. less for a sharp edge

D. more for a sharp edge
159. A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?
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A. always an node in formed

B. always an antinode is formed

C. sometimes a node and sometimes an antinode is formed

D. neither node nor antinode is formed

160. Longitudinal waves do not exhibit _____________________?
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A. reflection

B. polarization

C. diffraction

D. refraction