31) A 60 W lamp is connected to 220 V mains. The resistance of the coil of the lamp is
a) 1320 ohms
b) 37 ohms
c) 4840 ohms
d) 807 ohms
32) Resistance is measured in
a) amperes
b) coulombs
c) volts
d) ohms
33) The speed of sound in air at 00C is approximately
a) 500 m/s.
b) 330 m/s.
c) 1500 m/s.
d) 3 x 108 m/s.
34) Which of the following apparatus is used in the electrolysis of water?
a) Potentiometer
b) Ammeter
c) Voltameter
d) Voltmter
35) Lightning rods are made of
a) metals
b) plaster of paris
c) Bakelite
d) porcelain
We wish all the best to the students who are preparing for the exams.