131. Which of these is true of all simple machines?
132. Which of these is not a simple machine?
133. The plastic material commonly used for making gear wheels is
134. The reason for a swimming pool to appear less deep than the actual depth is
135. When light passes from one medium to another, this phenomenon of change in its direction is called ________
136. Optical fibre works on which of the following principle of light?
137. Which colour of light shows maximum deviation when passed through a prism ?
138. The sparkling of a diamond is due to
139. Stars appear twinkling because of ......... of light.
140. Stars in the sky appear to twinkle due to
Read More Section(Physics)
Each Section contains maximum 100 MCQs question on Physics. To get more questions visit other sections.