Electrical Flashcards
7 cards from real Ramsay Test practice questions. Tap to flip, then mark Knew It or Still Learning โ missed cards come back until you master them.
Read the first 7 Electrical flashcards as text
What is the total resistance of two 10-ohm resistors connected in parallel?
Answer: 5 ohms
Equal parallel resistors give half the value, so 10/2 = 5 ohms.
Which device protects a circuit by melting when current exceeds a rated value?
Answer: Fuse
A fuse contains a metal element that melts to open the circuit during overcurrent.
In a purely resistive AC circuit, the voltage and current are:
Answer: In phase
Resistance does not shift phase, so voltage and current peak together.
What unit measures electrical power?
Answer: Watt
Power is measured in watts, the product of volts and amperes.
A step-down transformer has more turns on which winding?
Answer: Primary
A step-down transformer has more primary turns to lower the secondary voltage.
What is the purpose of a grounding conductor?
Answer: Provide a safe path for fault current
Grounding gives fault current a low-resistance path to safely trip protection.
Doubling the voltage across a fixed resistor will:
Answer: Double the current
By Ohm's law, current is proportional to voltage for a fixed resistance.