25A
1. In our study of electrical power, we found that the unit of
measurement for electrical power is the _____________.
ANSWERS
1. watt
2. The time rate for consuming energy is _____________.
2. power
3. The basic power formula is P =
x __________.
3. P = E x I
4. If current and power in a circuit were known, you could solve for
voltage by using the formula E = ________________________.
4. E = P
5. In a circuit where voltage and power are known, you could solve for
I
voltage by using the formula I = _______________________.
5. I = P
6. We have two formulas with which to express power in watts in terms
E
of resistance; they are:
for current, P = ___________________.
for voltage, P = ___________________.
6. current, P= I2R
7. Write the three formulas for power.
voltage, P=E2
P= __________ P= __________ P= __________
R
7. P = E x I
8. The ratio of power output to power input is called
P =I2R
_________________________.
P=E
2
R
8. efficiency
9. Efficiency is the ratio of power
. to
power ______________________.
9. output
Now, if you feel you are ready, continue on to the examination.
input
IT0348
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