Question

a current of 4 A flows from a battery when a light bulb is connected across its terminals. The P.D across the terminal is 12V.
a) what quantity of charge leaves the battery every second.
b) how much potential energy does each coulomb leaving the battery possess.
c) how much charge must be given out by the battery if it is to supply 60 joules of energy?
d) How long does the battery take to supply 60 joules of energy?

Answer 1

current is 4 A that means 4 C charge per second

Answer 2

please also send the reply of b) c) and d)

Answer 3

the each coulomb possess the energy E=qV=(1C)*(12V)=12 J

Answer 4

energy E=QV...E=60J and V=12V ...you will get Q...

Answer 5

current I=Q/t....I=4 A and you know Q from the above equation...you will get time t...

Answer 6

if any problem...ask me

Answer 7

thanks

Answer 8

welcome..:)

Answer 9

in 10s, a charge of 25c leaves a battery and 200 j of energy are delivered to an outside circuit as result.
a) what is P.D across the battery?
b) what current flows from the battery?

Answer 10

current=charge/time...so what is the current here?

Answer 11

and energy E=Q*V...you will get V...

Answer 12

tell me the answers?

Answer 13

8 volt
and current is 2.5 amp

Answer 14

good job!!!:)

Answer 15

thanks

Answer 16

close it then...

Answer 17

wht?

Answer 18

the question

Answer 19

wht is difference between voltage and current

Answer 20

it may help you
http://hyperphysics.phy-astr.gsu.edu/hbase/emcon.html#emcon