Using Ohm’s Law in Series Circuits Using Ohm’s Law in a Simple, Single Resistor Circuit. ... Using Ohm’s Law in Circuits with Multiple Resistors. ... Combining Multiple Resistors into an Equivalent Total Resistor. ... Calculating Circuit Current Using Ohm’s Law Calculating Component Voltages Using Ohm’s Law. ...
REVIEW: Components in a series circuit share the same current: I Total = I 1 = I 2 = . . . I n The total resistance in a series circuit is equal to the sum of the individual resistances: RTotal = R 1 + R 2 + . . . R n Total voltage in a series circuit is equal to the sum of the individual voltage drops E Total = E 1 + E 2 + . . . En
The total current in a series circuit is the same as the current through any resistance of the circuit. IT = I1 = I2 = I3…. Given 120 V as the total voltage, and having determined the total resistance of the circuit as 40 Ω, you can now apply Ohms law to determine the total current in this circuit: IT = 120 V/ 40 Ω = 3 A.
To measure current with a digital multimeter it is possible to follow a few simple steps: Turn the meter on Insert the probes into the correct connections - in many meters there are a number of different connections for the probes. ... Set main selector switch on the meter switch to the correct measurement type, (i.e. ... When the measuring the current, optimise the range for the best reading. ... More items...
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