Question

if the current flowing in a heater is increased by 2 times then the energy produced in it
a)increases by 2 times
b)decreases by 2 times
c)increases by 4 times
d)decreases by 4 times​

Answer 1

Answer:

c. increases by 4times

Explanation:

P= i v

v = i r

p = (i*i) * r

if all power lost to resistance:

i new = 2 i

p new = (i new * i new) * r

p new = (2 i * 2 i) *:r

p new = 4 (i *i) * r

P new = 4 p

4 times