# Currret electricity mcq with answers

### Currret electricity mcq with answers

Electric current is the flow of:
A. Electrons
B. Protons
C. Neutrons
D. Photons

The unit of electric current is:
A. Ampere
B. Volt
C. Ohm
D. Watt

Ohm’s law states that the current flowing through a conductor is directly proportional to the:
A. Voltage across the conductor
B. Resistance of the conductor
C. Power dissipated by the conductor
D. Temperature of the conductor

The device used to measure electric current is called a:
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Galvanometer

In a series circuit, the current:
A. Remains constant throughout the circuit
B. Varies depending on the resistance
C. Splits up between the branches
D. Adds up across the components

In a parallel circuit, the current:
A. Remains constant throughout the circuit
B. Varies depending on the resistance
C. Splits up between the branches
D. Adds up across the components

Kirchhoff’s current law states that the sum of currents entering a junction in a circuit is equal to the sum of currents:
A. Leaving the junction
B. Dissipated by the resistors
C. Entering the battery
D. Flowing through the capacitors

The resistance of a conductor depends on its:
A. Length
B. Diameter
C. Temperature
D. All of the above

The total resistance in a series circuit is equal to the:
A. Sum of the individual resistances
B. Average of the individual resistances
C. Product of the individual resistances
D. Reciprocal of the individual resistances

The total resistance in a parallel circuit is equal to the:
A. Sum of the individual resistances
B. Average of the individual resistances
C. Product of the individual resistances
D. Reciprocal of the individual resistances

The reciprocal of resistance is called:
A. Conductance
B. Capacitance
C. Inductance

The power dissipated in a circuit can be calculated using the formula:
A. P = VI
B. P = V^2/R
C. P = I^2R
D. All of the above

The unit of electric power is the:
A. Ampere
B. Volt
C. Ohm
D. Watt

The electric power consumed by a device can be determined by measuring:
A. Voltage across the device
B. Current flowing through the device
C. Resistance of the device
D. All of the above

The electric power transmitted through a circuit can be minimized by reducing the:
A. Voltage
B. Current
C. Resistance
D. None of the above

The phenomenon in which a material allows the flow of electric current with little or no resistance is called:
A. Insulation
B. Superconductivity
C. Conductivity
D. Resistance

The device used to protect circuits from excessive current is called a:
A. Transformer
B. Capacitor
C. Resistor
D. Fuse

The device used to regulate voltage in a circuit is called a:
A. Transformer
B. Capacitor
C. Resistor
D. Voltage regulator

The direction of conventional current flow is:
A. From positive to negative
B. From negative to positive
C. Both directions simultaneously
D. None of the above

The device used to store electric charge is called a:
A. Capacitor
B. Inductor
C. Resistor
D. Transformer

The time required for a capacitor to charge or discharge to approximately 63.2% of its maximum voltage is known as:
A. Time constant
B. Charging time
C. Discharging time
D. Time delay

The property of an electric circuit that opposes changes in current is known as:
A. Capacitance
B. Resistance
C. Inductance
D. Conductance

The unit of electric charge is the:
A. Ampere
B. Volt
C. Coulomb
D. Ohm

The device used to measure electric potential difference is called a:
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Galvanometer

The relationship between electric current, voltage, and resistance is described by:
A. Ohm’s law
C. Newton’s law
D. Pascal’s law

The process of transferring electric charge from one object to another by direct contact is called:
A. Conduction
B. Induction
D. Insulation

The process of transferring electric charge from one object to another without direct contact is called:
A. Conduction
B. Induction
D. Insulation

The device used to increase or decrease the voltage in an electrical circuit is called a:
A. Transformer
B. Capacitor
C. Resistor
D. Transistor

The device used to protect sensitive electronic circuits from voltage spikes or surges is called a:
A. Capacitor
B. Transistor
C. Resistor
D. Surge protector