Download the app

Questions  

Current in an ac circuit is given byI=3 sin ωt+4 cosωt, then

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a
rms value of current is 5 A.
b
mean value of this current in any one half period will be 6/π
c
if voltage applied is V=Vmsinωt, then the circuit may be containing resistance and capacitance only.
d
if voltage applied rs V=Vmsinωt the circuit may contain resistance and inductance only.

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is C

i=3 sin ωt+4 cos ωt=535 sin ωt+45 cos ωt=5sin ωt+δ        ......irms value = 52AMean value=2πi0=10πAIf voltage applied is V=Vm sin ωt then I, given by Eq. (i), indicates that it is ahead of V by δ where 0 < δ < 90 whichindicates that the circuit contains R and C.If we find average value for the first half period (0 to T/2), then it will be 6π/A. But for different time interval, it will bedifferent.

Talk to our academic expert!

+91

Are you a Sri Chaitanya student?

ctaimg

Create Your Own Test
Your Topic, Your Difficulty, Your Pace


Similar Questions

A 50 W, 100 V lamp is to be connected to an ac mains of 200 V, 50 Hz. What capacitor is essential to be put in series with the lamp?


phone icon
whats app icon