wiz-icon
MyQuestionIcon
MyQuestionIcon
7
You visited us 7 times! Enjoying our articles? Unlock Full Access!
Question

In a metre bridge, the gaps are closed by resistances P and Q, P being less than Q. A balance is obtained when the jockey makes contact at a point of bridge wire 40 cm from one end. On shunting the coil Q with a resistance of 50 Ω, the balance point is moved through 10 cm. The resistance P and Q are

A
25 Ω,16.67 Ω
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
16.67 Ω,25 Ω
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
10 Ω,25 Ω
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
8 Ω,12 Ω
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 16.67 Ω,25 Ω
Balanced condition of meter bridge in 1st case:
PQ=4060=23
Upon shunting Q,
PQ||50Ω=40+106010=1
or P(50+Q)50Q=1
50Q50+Q=23Q
Q=25 Ω
P=23Q=503=16.67 Ω

flag
Suggest Corrections
thumbs-up
6
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Wheatstone Bridge
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon