Electricity and Circuits Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electricity and Circuits flashcards as text
Two 6-ohm resistors are connected in parallel. What is the total resistance?
Answer: 3 ohms
For two equal resistors in parallel, total resistance is half of one, so 3 ohms.
What is the unit of electrical power?
Answer: Watt
Electrical power is measured in watts, equal to volts times amps.
What happens to total resistance when more resistors are added in series?
Answer: It increases
Series resistances add together, so total resistance increases with each one.
Which component stores electrical charge?
Answer: Capacitor
A capacitor stores charge on its plates and releases it when needed.
What is the power consumed by a device drawing 2 amps at 120 volts?
Answer: 240 watts
Power equals voltage times current, so 120 V × 2 A = 240 W.
A diode allows current to flow in how many directions?
Answer: Only one direction
A diode permits current flow in only one direction, blocking the reverse.
What is the purpose of a switch in a circuit?
Answer: To open or close the current path
A switch opens or closes the circuit to turn current on or off.