Basic Electricity neco past questions and answers

Basic Electricity neco past questions and answers

What is the formula to calculate electric charge?

A) Q = V/I

B) Q = CV

C) Q = I/R

D) Q = It

Answer: D) Q = It

What property of a material determines its opposition to the flow of electric current?

A) Conductance

B) Capacitance

C) Resistance

D) Impedance

Answer: C) Resistance

Which type of circuit has only one path for current flow?

A) Series circuit

B) Parallel circuit

C) Complex circuit

D) Combination circuit

Answer: A) Series circuit

What is the unit of electrical capacitance?

A) Ohm

B) Farad

C) Henry

D) Ampere

Answer: B) Farad

What happens when two positively charged objects are brought close to each other?

A) They repel each other

B) They attract each other

C) No effect

D) They lose charge

Answer: A) They repel each other

What law describes the relationship between the voltage across a conductor and the current through it?

A) Ohm's Law

B) Kirchhoff's Law

C) Coulomb's Law

D) Ampere's Law

Answer: A) Ohm's Law

Which device is used to store electrical energy in a circuit?

A) Capacitor

B) Inductor

C) Resistor

D) Transformer

Answer: A) Capacitor

What is the SI unit of frequency?

A) Hertz

B) Watt

C) Joule

D) Newton

Answer: A) Hertz

Which type of current is commonly used in household electrical systems?

A) Direct Current (DC)

B) Alternating Current (AC)

C) Static Electricity

D) Magnetic Current

Answer: B) Alternating Current (AC)

What is the purpose of a ground wire in an electrical system?

A) To carry current to appliances

B) To protect against electrical shock

C) To increase resistance

D) To store electrical charge

Answer: B) To protect against electrical shock

What is the function of an inductor in an electrical circuit?

A) To store charge

B) To regulate voltage

C) To oppose changes in current flow

D) To conduct electricity

Answer: C) To oppose changes in current flow

Which instrument is used to measure electrical potential difference?

A) Ammeter

B) Voltmeter

C) Ohmmeter

D) Galvanometer

Answer: B) Voltmeter

What happens to the brightness of a bulb if the voltage across it decreases?

A) Increases

B) Decreases

C) Remains the same

D) Becomes zero

Answer: B) Decreases

What is the unit of electrical power?

A) Ampere

B) Ohm

C) Volt

D) Watt

Answer: D) Watt

Which law states that the induced electromotive force in a circuit is directly proportional to the rate of change of current?

A) Kirchhoff's Law

B) Lenz's Law

C) Faraday's Law

D) Ampere's Law

Answer: C) Faraday's Law

What is the role of a resistor in an electrical circuit?

A) To store charge

B) To increase current flow

C) To limit current flow

D) To regulate voltage

Answer: C) To limit current flow

What is the primary function of an electrical conductor?

A) To prevent current flow

B) To store electrical energy

C) To carry electrical current

D) To oppose current flow

Answer: C) To carry electrical current

Which component is used to change the direction of current flow periodically in a circuit?

A) Capacitor

B) Resistor

C) Diode

D) Alternator

Answer: D) Alternator

What property of a material makes it a good insulator?

A) High resistance

B) Low resistance

C) High conductivity

D) Low capacitance

Answer: A) High resistance

What does an ammeter measure in an electrical circuit?

A) Voltage

B) Resistance

C) Current

D) Capacitance

Answer: C) Current