Question

An electric toy with a resistance of 2.50\,\Omega is operated by a 3.00\,\text{V} battery. (c) How much energy was delivered to the toy [over four hours]?

Answer 1

Energy = 51840 J = 51.84 KJ

Step-by-step explanation:

The electrical energy delivered to the toy can be found out by the following formula:

`Energy = (Power)(time)\\Energy = (VI)(t)\\Enegry = VIt\\`

where,

V = Voltage = 3 V

R = Resistance = 2.5 Ω

I = Current = V/R (Ohm's Law) = 3 V/2.5 Ω = 1.2 A

t = time = (4 h)(3600 s/1 h) = 14400 s

Therefore,

`Energy = (3\ V)(1.2\ A)(14400\ s)\\`

Energy = 51840 J = 51.84 KJ