Home
Class 12
PHYSICS
A direct current of 2 A and an alternati...

A direct current of 2 A and an alternating current having a maximum value of 2 A flow through two identical resistances . The ratio of heat produced in the two resistances will be

A

`1:1`

B

`1:2`

C

`2:1`

D

`4:1`

Text Solution

Verified by Experts

The correct Answer is:
C
`H(DC)=I^(2)Rt=2^(2)RT `joule
`H(AC)I^(2)Rt=(I_0)/(sqrt(2))^(2) Rt=(2^2)/(2)Rt`
`(H(DC))/(H(AC))=2/1`.
Promotional Banner

Topper's Solved these Questions

  • MISCELLANEOUS VOLUME 5

    CENGAGE PHYSICS ENGLISH|Exercise Multiple Correct|34 Videos

  • MISCELLANEOUS VOLUME 5

    CENGAGE PHYSICS ENGLISH|Exercise Linked Comprehension|84 Videos

  • MISCELLANEOUS VOLUME 3

    CENGAGE PHYSICS ENGLISH|Exercise True and False|3 Videos

  • NUCLEAR PHYSICS

    CENGAGE PHYSICS ENGLISH|Exercise ddp.5.5|14 Videos

Similar Questions

Explore conceptually related problems

A steady current of magnitude I and an AC current of peak value I are allowed to pass through identical resistors for the same time. The ratio of heat produced in the two resistors will be

A direct current of 10 A is superimposed on an alternating current / = 40 cos omegat (A) flowing through a wire. The effective value of the resulting current will be

A direct current of 5 amp is superimposed on an alternating current I=10 sin omega t flowing through a wire. The effective value of the resulting current will be:

A direct current of 5 amp is superimposed on an alternating current I=10 sin omega t flowing through a wire. The effective value of the resulting current will be:

The current flowing in 3Omega Resistance will be

A capacitor of capacitance C has charge Q. it is connected to an identical capacitor through a resistance. The heat produced in the resistance is

Two cells of 1.5 V and 2 V , having internal resistances of 1Omega and 2Omega respectively, are connected in parallel so as to read the current in the same direction through an external resistance of 5 Omega . The current in the external resistance will be

A cell of internal resistance r drivers current through an external resistance R. The power delivered by the to the external resistance will be maximum when:

In a heating arrangement , an alternating current having a peak value of 28 A is used . To produce the same heat energy , If the constant current is used, its magnitude must be

If a direct current of value a ampere is superimposed on an alternating current 1 = b sin omega t flowing through a wire, what is the effective value of the resulting current in the circuit?