(c) The athlete"s kinetic energy
   (d) The athlete"s angular momentum
Ans: (d)
267. The apparent weight of a steel sphere immersed in various liquids is
   measured using a spring balance. The greatest reading is obtained for the
   liquid [CDS 2010]
   (a) having the smallest density
   (b) having the largest density
   (c) in which the sphere was submerged deepest
   (d) having the greatest volume
Ans: (c)
268. A semiconductor has:
   (a) negative temperature coefficient
   (b) positive temperature coefficient
   (c) both positive or negative temperature coefficient
   (d) None of these
Ans: (a)
269. Two most popular semiconductors which are frequently used in solid
   state electronic devices are:
   (a) Germenium and Silicon
   (b) Germenium and Carbon
   (c) Silicon and Carbon
   (d) None of these
Ans: (a)
270. Which one of the following is the purest form of semiconductor:
   (a) intrinsic
   (b) extrinsic
   (c) both of these
   (d) None of these
Ans: (a)
271. In p-type of semiconductor the current mainly flows due to :
   (a) electrons