Home
Class 12
PHYSICS
The element of an electric heater is in ...

The element of an electric heater is in the form of a coil. Once it is heated by dc volatage and then by ac voltage of equal potential difference. Will the production of heat in both cases be same of different?

Text Solution

Verified by Experts

If resistance by dc is R, then by ac impedance:
`Z sqrt(R^(2)+ (omega C)^(2)) gt R`
Current will be lesser in case of ac. Hence, heat produced in case of ac will be less.
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CENGAGE PHYSICS|Exercise Exercises Subjective|15 Videos

  • ALTERNATING CURRENT

    CENGAGE PHYSICS|Exercise Exercises Single Correct|63 Videos

  • ALTERNATING CURRENT

    CENGAGE PHYSICS|Exercise Solved Examples|6 Videos

  • OSCILLATIONS

    CENGAGE PHYSICS|Exercise QUESTION BANK|39 Videos

  • ATOMIC PHYSICS

    CENGAGE PHYSICS|Exercise ddp.4.3|15 Videos

Similar Questions

Explore conceptually related problems

Two heater wires, made of the same material and having the same length and the same radius, are first connected in series and then in parallel to a constant potential difference. If the rate of heat produced in the two cases are Hs and Hp respectively then (Hs)/(Hp) will be

One kilogram of graphite is burnt in a closed vessel.The same amount of graphite is burnt in an open vessel.Will the heat evolved in two cases be same or different?

An electric heater is connected to DC and AC sources of equal voltage turn by turn. In which case (AC or DC) the rate of heat production will be more ?

Heat produced in an electric circuit depends upon the potential difference, current and time.

Heat produced in an electric circuit depends upon the potential difference, current and time.