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2023

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How much time is required for an operating 60-watt light bulb to use 120 joules of electrical energy?
A
2 sec
B
.2 sec
C
.5 sec
D
5 sec
Explanation: 

Detailed explanation-1: -And it is measured as joules/second or watt. So, 60 Watt bulb, it consumes 60 Joules of energy in one second. If it is kept ON for 2 seconds, it will consume 120 joules of energy. Hence answer is 120 J.

Detailed explanation-2: -Previously we used the example of a 60W light bulb. Its 60W rating means that for each second that it’s on it uses 60 joules of energy. Over the course of 60 minutes, or 3, 600 seconds, this means it would use 216, 600 joules of energy.

Detailed explanation-3: -FALSE-Power is the energy per time ratio. A 60-Watt bulb would consume 60 Joules of energy in 1 second, 120 Joules of energy in 2 seconds, and 30 Joules of energy in 0.5 seconds.

Detailed explanation-4: -For example, a 60-watt incandescent light bulb running on 120 volts will have an amperage draw of 0.5 amperes.

There is 1 question to complete.