Question

If an electric lamp draws 500mA with voltage of 2.5v ,calculate the power and the energy consumed in the minute

Answer 1

I hope this answer is helpful to you

Answer 2

Answer:

P=1.25 watt , W=75 joule

Explanation:

Concept

• In science and engineering, power is defined as the quantity of work done W, or the amount of energy transmitted, divided by the time interval t—or W/t. A low-powered motor can complete a certain amount of work over a long period of time or a high-powered motor can complete the task in a short period of time.

Given

Electric lamp=500mA

Voltage=2.5v

Find

Power and Energy consumed

Solution

voltage V = 2.5 V, current I = 500 mA = 0.5 A,

Time t = 1 min = 60 seconds

Now, power P = V x I = 2.5 x 0.5 = 1.25 watt

Energy consumed in 1 minute is W = P x t

∴ W = 1.25 x 60 = 75 joule

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