Question

the music system is left playing for several hours and finally the battery voltage drops and the music system stops playing in the current drops to 320 mA at what battery voltage does the music system stop playing​

Answer 1

Answer:

ANSWER

(i) Given : I=400mA=

1000

400

=0.4A,V=12V

Resistance of the music system =

1

V

=

0.4

12

=

4

120

=30Ω.

(ii) Given : I=320mA=

1000

320

=0.32A, Resistance of music system =30Ω

According to Ohm's law,

V=IR=30×0.32=9.60V

The music system stops playing at 9.60V