What is the r.m.s. value of an alternating current which when passed through a resistor produces heat which is thrice of that produced by a direct current of 2 amperes in the same resistor?

see full answer

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

6 A

2 A

3.46 A

0.66 A

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Heat produced by AC = 3 × Heat produced by DC∴ irm2Rt=3 × i2 Rt⇒irms2=3 × 22⇒ irms=23=3.46 A

Watch 3-min video & get full concept clarity