Question

A heater coil is cut in to two equal parts and only one part is now used in the heater instead of the original
one. Heat generated by one half of the coil would be how much in comparison to that of the full length coil?
A) 4 times B) 2 times C) Half D)1/4th

Answer 1

Answer:

B0 2 times.

Explanation:

H=  

R

V  

2

 

​  

t

After cutting equally, length becomes half.

R∝I

It means, resistance becomes half.

H=  

2

R

​  

 

V  

2

 

​  

t

H=2  

R

V  

2

 

​  

t

Heat generated will be doubled.

Answer 2

Answer:

C) Half

Explanation:

this is answer.