Q.1
Ratio of the amount of heat developed in the four arms of a balanced wheat stone bridge, when the arms have resistance P=100Ω, Q=10Ω, R=300 Ω and S=30 Ω respectively is
  • a) 3:30:1:10
  • b) 30:3:10:1
  • c)30:10:1:3
  • d)30:1:3:10
Q.2
Twenty one similar electric bulbs, each of resistance r are connected in series across 220 V supply. After one bulb is fused, the remaining bulbs are connected again in series cross the same supply. The percentage total change in illumination of bulbs is
  • a) decrease by 5%
  • b) increase by 5%
  • c) decrease by 10%
  • d) increase by 10%
Q.3
The current capacity of a storage cell is 3 Ah. The maximum current it can supply for half hour is
  • a)1.5 A
  • b) 3 A
  • c)4.5 A
  • d)6.0 A
Q.4
The current capacity of the charged secondary cell does not depend on
  • a) rate of discharge
  • b) temperature
  • c)amount of active material
  • d)rate of charging
Q.5
The amount of ions liberated by 96500C charge passed through the electrolyte is called
  • a) electrochemical equivalent
  • b) chemical equivalent
  • c)gram equivalent
  • d)none of the above
Q.6
Which of the following acts as depolariser in Leclanche cell?
  • a) MnO2
  • b) NH4Cl
  • c) Mn2O3
  • d) ZnCl2
0 h : 0 m : 1 s