Key Terms in Ohm's Law and Circuit Design

Which statement best defines Ohm's Law for electrical circuits?

• Voltage equals current divided by resistance

• Current equals voltage divided by resistance

• Current equals resistance divided by voltage

• Resistance equals current divided by voltage

Which pair correctly matches a circuit type with its path characteristics?

• Parallel circuit – no closed path for current

• Parallel circuit – one single path for current

• Series circuit – one single path for current

• Series circuit – multiple paths for current

Conductance in a circuit is best described as

• A measure of how easily current flows

• A measure of opposition to current

• A way to store electrical energy

• A method to increase circuit voltage

Which device is primarily used to take multiple electrical measurements like voltage, current, and resistance?

• Oscillator

• Transformer

• Multimeter

• Resistor

Which statements about circuit diagrams are correct?

• Schematic diagrams use standardized symbols for parts

• Wiring diagrams use pictures to show connections

• Schematic diagrams show physical cable routing

• Wiring diagrams emphasize exact graphical symbols

A lamp receives 2 amperes when 12 volts are applied. What is the lamp's resistance?

• 6 ohms using R = V/I

• 24 ohms using R = I/V

• 0.17 ohms using R = I/V

• 10 ohms using R = V×I

Two identical bulbs are first wired in series and then in parallel with the same battery. Which arrangement gives each bulb more current and why?

• Parallel, because each bulb gets full battery voltage

• Series, because current splits across separate paths

• Series, because total resistance is lower than one bulb

• Parallel, because total resistance decreases with more branches

What happens to the total resistance when more resistors are added in parallel?

• Total resistance increases

• Total resistance decreases

• Total resistance remains unchanged

• Total resistance becomes infinite

If a circuit has a voltage of 9 volts and a resistance of 3 ohms, what is the current flowing through it?

• 3 amperes using I = V/R

• 27 amperes using I = V×R

• 0.33 amperes using I = R/V

• 6 amperes using I = V+R

Which component is used to limit the flow of electric current in a circuit?

• Switch

• Inductor

• Resistor

• Capacitor