Mechanical Aptitude Basic Electrical Circuits Flashcards
7 cards from real MECHANICAL APTITUDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mechanical Aptitude Basic Electrical Circuits flashcards as text
An electric motor draws 5 amps from a 240V supply. How much power does it consume?
Answer: 1,200 watts
Power = Voltage × Current = 240V × 5A = 1,200 watts.
What happens to the total resistance in a series circuit when an additional resistor is added?
Answer: Total resistance increases
In a series circuit, resistances add together directly, so adding any resistor always increases total resistance.
Which of the following is a good conductor of electricity?
Answer: Copper
Copper has very low electrical resistance due to its free electrons, making it an excellent conductor widely used in wiring.
In a series circuit with a 12V battery and three identical 4-ohm resistors, what is the voltage across each resistor?
Answer: 4 volts
Total resistance = 12 ohms, current = 12V/12Ω = 1A; voltage across each resistor = 1A × 4Ω = 4 volts.
What is the term for the opposition to the flow of electric current in a conductor?
Answer: Resistance
Resistance, measured in ohms, is the opposition that a material or component presents to current flow.
A circuit has two light bulbs connected in series. When one bulb burns out, what happens to the other?
Answer: The other bulb also goes out
In a series circuit, a break anywhere opens the entire circuit, stopping current flow through all components.
According to Ohm's Law, if voltage across a resistor doubles while resistance stays the same, what happens to current?
Answer: Current doubles
Ohm's Law states I = V/R; if V doubles and R is constant, then I also doubles proportionally.