wiz-icon
MyQuestionIcon
MyQuestionIcon
6
You visited us 6 times! Enjoying our articles? Unlock Full Access!
Question

A resistor of resistance R is connected to an ideal battery (battery with zero internal resistance). If the value of R is increased, the power dissipated in the resistor will___?

A
increase
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
decrease
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
remains unchanged
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Data insufficient
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B decrease
We have two relations
P=i2Rand P=V2R. This causes confusion. But this is how you solve such a problem.
If R increases, 'i' would clearly decrease because V=iR
Thus in the first equation, i and R are both variables.
In the second equation, V wouldn’t change since the battery keeps it constant.
That means we have to use P=V2R. In other words, use the equation where one quantity i constant.
ThusPα1R and hence
Power delivered will decrease.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Power Delivered and Heat Dissipated in a Circuit
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon