5F Electrical Energy Transfer

Front

Electric current (Amps) is a measure of ____.

Back

The net movement of electric charges.

Front

How much current is used by a 120­V refrigerator that uses 650 W of power?

Back

5.4 Amps

Front

Energy released from the focus during an earthquake is called ____.

Back

Seismic wave.

Front

The expression that gives the efficiency of a lamp using 12 W of power from a 60 W source is ____.

Back

(12/60) x 100%.

Front

The tectonic plates float on which semi-liquid layer?

Back

Asthenosphere.

Front

What is the formula for calculating electrical power?

Back

Power (P) = Voltage (V) x Current (I).

Front

What is the unit of electrical resistance?

Back

Ohm (Ω).

Front

What is the relationship between voltage, current, and resistance known as?

Back

Ohm's Law.

Front

What is the definition of efficiency in energy transfer?

Back

Efficiency = (Useful energy output / Total energy input) x 100%.

Front

What is the term for the flow of electric charge?

Back

Electric current.