Current Electri...

Two resistance filaments of same length are connected first in series and then in parallel. Find the ratio of power dissipated in both cases assuming that equal current flows in the main circuit.

For a thermocouple the neutral temperature is 270ºC when its cold junction is at 20ºC. What will be the neutral temperature and the temperature of inversion when the temperature of cold junction is increased to 40ºC ?

If θ_i is the inversion temperature, θ_n is the neutral temperature, θ_c is the temperature of cold junction, then

The mass of a product liberated on anode in an electrochemical cell depends on

How much current should be passed through acidified water for 100s to liberate 0.224 litre of hydrogen?

Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220 V a.c., supply line. The power drawn by the combination in each case respectively will be

A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The watt-hour efficiency of the battery is

Time taken by a 836 W heater to heat one litre of water from 10ºC to 40ºC is

The thermo emf of a thermocouple varies with the temperature θ of the hot junction as E = a θ + b θ² in volts where the ratio a/b is 700ºC. If the cold junction is kept at OºC, then neutral temperature is