Question

7. A touch bulb is rated 2. sv and isoma calculate its (a) Porses
(b) resistence (c) Energy consumed of bulle is lighter argue hours​

Answer 1

Answer:

Given :

V=2.5 V

I=750mA= 750x10⁻³A

power =p=?

Power =V*I           

  =2.5x750x10⁻³

=1.875W

reistance :

V=IR

R=V/I=2.5/750x10⁻³=3.3 ohms

Energy consumed if bulb is lighted for 4 hours :

E=p*t=1.875x4=7.500Wh=27x 10³ joules

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