31. Electrical Resistance Measurement

Where there is no continuity found when testing with a DMM, the screen may display what? a) OL b) 0 c) V (omega) d) Null

a) OL

Ohm's law for calculating voltage is ____. a) E = I x R b) E = P x R c) E = P x I x R d) All of the above

a) E = I x R

A(n) _____ is used to measure resistance. a) Ohmmeter b) Ammeter c) Voltmeter d) Flow meter

a) Ohmmeter

If a wire has continuity, it _____. a) Cannot conduct current b) Has a complete path for current to flow c) Cannot be used in a circuit d) Has a short

b) Has a complete path for current to flow

Which is not an application of Ohm's Law? a) Troubleshooting circuits b) Sizing components c) Creating multiple voltage levels d) None of the above

b) Has a complete path for current to flow

To find the total resistance in a series circuit, ____. a) Multiply the individual resistances b) Average the resistances c) Add the individual resistances d) Subtract the individual resistances

c) Add the individual resistances

Which of the following statements does not accurately describe a part of the process of measuring the resistance of a component that is connected in a circuit. a) Turn off the power supply b) Disconnect one of the component leads from the circuit c) Make sure the power supply is on d) Connect the leads across the component

c) Make sure the power supply is on

Resistance is measured in units of ____. a) Volts b) Watts c) Ohms d) Amps

c) Ohms

Which of the following is a formula for calculating total resistance in a parallel circuit? a) RT = ET x IT b) RT = R1 + R2 + R3 c) RT = 1 / ( 1/R1 + 1/R2 + 1/R3 ) d) All of the above

c) RT = 1 / ( 1/R1 + 1/R2 + 1/R3 )