Question

18. A bulb used in a car is rated at 12 V, 48 W. Find
the energy consumed in one minute when the
bulb is connected to
(a) a 12 V battery, and
(b) a 6 V battery.​

Answer 1

Hii i am girl

p =48w

p.d =12v

p = v^2/R

R = 3ohm

T =60s

for 12v

i = 12/3 = 4A

Energy consumed = i^2 Rt = 16*3*60= 2880j

for 6v

i = 6/3 =2A

energy consumed = 4 * 3*60 =720j

_______/\______☺️

hope it may helps you

Answer 2

Explanation:

the resistance of a bulb R=v^2/p

R=3 ohm

when 12v connected :this current I = 12/3

=ivt = 720 j

energy consumed= ivt= 48x60=2880j

when 6 volt connected then current I =6/3

=2

energy consumed =2x