CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In an R-C circuit, select the correct options among the following :

A
Instantaneous A.C is given by I=I0sin(wt+ϕ)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
The alternating current in the circuit leads the emf by a phase angle
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Its impedance is R2+(wC)2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Its capacitive reactance is ωC
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct options are
A The alternating current in the circuit leads the emf by a phase angle
B Instantaneous A.C is given by I=I0sin(wt+ϕ)

A, B

Instantaneous current is the current at any instant. In an RC circuit, the instantaneous AC current is given by

I=I0sin(ωt+ϕ)

In circuits with primary capacitive loads, current leads the voltage. This is because current must flow to the two plates of the capacitor, where charge is stored. Only after charge accumulates at the plates of the capacitor a voltage difference is established.

Z=R2+(1wC)2
Zc=1wC
current leads by π2 in C-R circuit
So Option A and B are correct

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Inductive Circuits
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon