Question

Batteries are usually identified by their voltage.

Which battery would be able to give 18 joules of energy to 12 coulombs of charge?

Question 7 options:

1.5 Volt battery


216 Volt battery


9 Volt battery


12 Volt battery


6 Volt battery


3 Volt battery

Answer 1

Step-by-step explanation:

Given parameters:

Electrical energy = 18J

Quantity of charge Q = 12C

Unknown:

Voltage = ?

Solution:

The expression of electrical potential energy is given as:

Electrical potential energy =
`(1)/(2)` c v²

c is the quantity of charge

v is the voltage

18 =
`(1)/(2)` x 12 x v²

18 = 6v²

v² = 3

v = 1.7v