Question

How much useful energy an electrical device produces compared to amount that was supplied to the device. Answer in one word.​

Answer 1

Answer:

Explanation:

How do you calculate useful energy output?

Calculating efficiency

The efficiency of a device, such as a lamp, can be calculated:

efficiency = useful energy out ÷ total energy in (for a decimal efficiency)

or.

efficiency = (useful energy out ÷ total energy in) × 100 (for a percentage efficiency)

Answer 2

Explanation:

Impulse-Momentum Theorem: When a net. force acts on an object, the impulse of the net. force is equal to the change in momentum of. the object: F ∆t = m−→..