Transcript OHM`S LAW

OHM’S LAW
Ohm’s Law
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Ohm’s Law
It takes one volt to
push one amp through
one ohm.
Ohm’s Law
Ohm’s Law
Ohm’s Law
Ohm’s Law
• 3 V is applied across a 6 ohm resistor,
what is the current?
• I = 3/6 = 0.5 A
• For most electronic circuits the ampere is
too large and the ohm is too small, so we
often measure current in milliamps (mA)
and resistance in kilohms (k ). 1 mA =
0.001 A and 1 k = 1000 .
Ohm’s Law
• A lamp connected to a 6 V battery passes
a current of 60 mA, what is the lamp's
resistance?
• R = 6/60 = 0.1 k = 100
Ohm’s Law
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