A 5°C rise in temperature is observed in a conductor is doubled, the rise in temperature will be approximately
16°C
10°C
20°C
12°C
A 5 A fuse wire can withstand a maximum power of 1 W in a circuit. The resistance of the fuse wire is
0.2 Ω
5 Ω
0.4 Ω
0.04 Ω
Two identical batteries each of emf 2 V and internal resistance 1 Ω are available to produce heat in an external resistance by passing a current through it. The maximum power that can be developed across R using these batteries
3.2 W
2.0 W
1.28 W
Faraday's laws are consequence of conservation of
Energy
Energy and magnetic field
Charge
Magnetic field
Power dissipated across the 8Ω resistor in the circuit shown here is 2 W. The power dissipated in watt units across the 3Ω resistor is
2.0
1.0
0.5
3.0
If the cold junction of a thermocouple is kept at 0oC and the hot junction is kept at T0C, then the relation between neutral temperature (Tn) and temperature of inversion (Ti) is
Tn = 2Ti
Tn = Ti – T
Tn = Ti + T
A 100 W - 200 V bulb is connected to a 160 V power supply. The power consumption would be
125 W
100 W
80 W
64 W
In electrolysis the mass deposited on an electrode is directly proportional to
Current
Square of current
Concentration of solution
Inverse of current
In producing chlorine through electrolysis 100 W power at 125 V is being consumed. How much chlorine per minute is liberated ? (ECE of chlorine is 0.367 x 10-6 kg/C)
17.6 mg
21.3 mg
24.3 mg
13.6 mg
The total power dissipated in watts in the circuit shown here is
16
40
54
4
