Solution to Frame 126

Solve this problem:

I=E

R

R = E: E = 15 volts, I = 3 amp

I

R = _______________

Solution to Frame 127

Solve this problem:

R = E = 15

I

3

E = IR: I = 3 amp, R = 3 ohms

R = 5 ohms

E = __________________

Solution to Frame 128

The basic formula for Ohm's law (I = E) expresses

E = IR

R

the basic relationship between current and voltage.

E=3x3

That is, if the voltage is increased, the current will

___________. If the voltage is decreased, the

E = 9 volts

current will ________________.

Solution to Frame 129

Now let us work with some actual circuit drawings.

increase

decrease

MD0902

1-31

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