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

An electric tea kettle has two electric heating coils. When one of the coil is switched on the tea begins to boil in 6 minutes. When the other is switched on, the boiling begins in 8 minutes
If both the coils are now arranged in series and switched on, boiling starts in

A
24/7 minutes
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
12 minutes
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
14 minutes
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
4 minutes
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 14 minutes
When they are connected in series , the total resistance R=R1+R2
Resistance is proportional to the temperature. So , T=T1+T2=6+8=14 mins

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electromagnetic Induction and Electric Generators
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon