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Ohm's Law

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by

Trishina Nagumi

on 19 January 2013

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Transcript of Ohm's Law

What is Ohm's Law? What is Ohm's Law? Voltage Resistance Current The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit. What is Ohm's Law? Ohm's Law Ohm's Law Equation I = V
R R = V
I Energy required to move a charge from one point to another.
has units of Volts (V) and is measured using voltmeters.
electric potential difference the hindrance to
the flow of charge
measured in ohms the rate at which charge
flows past a point
on a circuit. V = I • R Circuit Connection Series Circuit Parallel Circuit Only one path
for the current
to take is simply a closed
loop through
which charges
can continuously
move More then one
path way for
current
to flow. Relationship on Ohm's Law Current Voltage Resistance Series Circuit Parallel Circuit Itot = I1=
I2=I3.. Itotal = I1
+ I2 + I3 Vbatt= V1 +
V2 + V3 Vbatt=V1
= V2 =V3 = .. Rtot = R1 +
R2 + R3 1/Req = 1/R1 +
1/R2 + 1/R3 Series Circuit Parallel Circuit Comparison Current Resistance More resistor
current decreases
resistance
increases. Increase in resistor
current increases, decreases in resistance The current in a circuit is
directly proportional to the
electric potential difference
and inversely proportional
to the total resistance
offered by the
external circuit.
Full transcript