wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A potentiometer wire 10 m long and having 20Ω resistance is connected in series with a battery and a resistance R=2160Ω. A Daniel cell of e.m.f 1.08 V is balanced across the P.D of the resistance ‘R’. The e.m.f of thermocouple is balanced across 300 cm of the wire. The e.m.f of thermocouple is

A
2 mV
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
4 mV
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
3 m/V
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
1 mV
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 3 m/V
P=RL=2010=2Ω/mi=VR1=1.082160=0.05×102AE=iPl=0.05×102×2×3=3×103V=3mV

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electrical Instruments
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon