Ans: (b)
264. The cell that can be recharged, after it has run down, by passing a direct
   current through it from a source of current is
   (a) Voltaic cell
   (b) Leclanche cell
   (c) Dry cell
   (d) An accumulator
Ans: (d)
265. The device that is used to measure the electromotive force of a cell is
   (a) an ammeter
   (b) a rheostat
   (c) a voltmeter
   (d) a voltameter
Ans: (c)
266. The SI unit of electric current is
   (a) the ampere
   (b) the volt
   (c) the ohm
   (d) the coulomb
Ans: (a)
267. A rheostat is used
   (a) to increase the current flow in a circuit
   (b) to decrease the current flow
   (c) to measure the flow of electric current
   (d) Either (a) or (b) above
Ans: (d)
268. Which of the following wires of same dimensions offers least resistance
   to the ,flow of current?
   (a) copper
   (b) aluminium
   (c) silver
   (d) nichrome