wiz-icon
MyQuestionIcon
MyQuestionIcon
8
You visited us 8 times! Enjoying our articles? Unlock Full Access!
Question

Three resistors are connected in series with ideal cell of emf 62 V.Measurements are carried out by a single voltmeter.The results of measurements are VAB=VBC=VCD=20 V. Then

A
VAC=40 V
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
VAB will be less than 40 v
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Resistance of voltemeter is 20R1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
R1=R2=R3
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct options are
A VAC=40 V
C Resistance of voltemeter is 20R1
D R1=R2=R3
From symmetry R1=R2=R3=R
let resistance of voltmeter be RV
then

20=iRV=(Ii)R -----(1)
and 20=622IR -----(2)
By (1) & (2)
RV=20R

than
Req=R+2R×20R22R
Req=3111R
I=6231×11=22R
VAC=I×2011R=2011×=40 V



flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Alternating Current Applied to a Capacitor
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon