Electric Current
Resistance
Circuits
Power & Energy
Random Trivia
100
Which particle is primarily responsible for electric current in a wire?
A. Ions
B. Proton
C. Neutron
D. Electron
D. Electron
100
What is the total resistance of two 4Ω resistors in series?
A. 2Ω
B. 4Ω
C. 8Ω
D. 16Ω
C. 8Ω
100
What type of circuit is used in household wiring?
A. Series
B. Parallel
B. Parallel
100
If resistance increases while voltage remains constant, what happens to power?
A. It increases
B. It decreases
C. It stays the same
D. It becomes zero
B. It decreases
100
What is the world’s largest desert?
A. Arabian Desert
B. Great Basin Desert
C. Mojave Desert
D. Sahara Desert
D. Sahara Desert
200
What is the SI unit for electric current?
A. Ampere
B. Volt
C. Coulomb
D. Watt
A. Ampere
200
Which circuit property does NOT impact the resistance of a current?
A. Material
B. Length
C. Cross-sectional area
D. Volume
D. Volume
200
What type of circuit component limits current by providing resistance?
A. Resistor
B. Conductor
C. Capacitor
D. Insulator
A. Resistor
200
What is the formula for electric power?
A. P=IV
B. P=IR
C. P=V/R
D. P=VQ
A. P=IV
200
Which is the most spoken language in the world?
A. English
B. Italian
C. Mandarin Chinese
D. Russian
C. Mandarin Chinese
Mandarin Chinese is the most spoken language in the world, followed by Spanish.
300
If a 12V battery is connected to a 6Ω resistor, what is the current?
A. 0.5 amps
B. 2 amps
C. 6 amps
D. 12 amps
B. 2 amps
300
What happens to the resistance of a wire when its length doubles?
A. It is cut in half
B. It doubles
C. It stays the same
D. It quadruples
B. It doubles
300
If one bulb in a parallel circuit burns out, what happens to the others?
A. They all go out
B. They get dimmer
C. They flash
D. They stay the same
D. They stay the same
300
What is the unit of power?
A. Volt
B. Joule
C. Watt
D. Ampere
C. Watt
300
Mount Kilimanjaro is located in which country?
A. Kenya
B. Tanzania
C. Cameroon
D. Jamaica
B. Tanzania
400
What is the name of a device that measures current in a circuit?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Galvanometer
B) Ammeter
400
What is the formula for Ohm’s Law?
A. V= I x R
B. P=IV
C. V=P/R
D. I=VR
A. V= I x R
400
TRUE or FALSE
Current is constant at all points in a parallel circuit.
False -
No, in a parallel circuit the current in each branch can be different, but the total current entering the parallel section is equal to the sum of the currents in all the branches combined.
400
Which equation relates electrical power, current, voltage, and resistance?
A. Coulomb's Law
B. Ohm's Law
C. Watt's Law
C. Watt's Law
400
How many keys are there on a standard piano?
A. 22
B. 44
C. 66
D. 88
D. 88
500
Which has the lowest resistivity?
A. Plastic
B. Rubber
C. Silver
D. Paper
C. Silver
500
How does increasing the cross-sectional area of a wire affect its resistance?
A. Increases resistance
B. Decreases resistance
C. No effect
D. Depends on the voltage
B. Decreases resistance
500
TRUE or FALSE:
Current is directly proportional to resistance.
False -
Current is inversely proportional to resistance.
500
A battery in a circuit converts energy to and from what form?
A. Potential > Kinetic
B. Mechanical > Chemical
C. Chemical > Electrical
D. Kinetic > Mechanical
C. Chemical > Electrical
500
What is the world’s largest city by population?
A. London
B. Tokyo
C. Paris
D. Barcelona
B. Tokyo
Tokyo is the world’s most populous metropolitan area. It has a population of 37.8 million people.