Understanding Electric Current Concepts

What is electric current?

• The pushing force that moves electrons.

• The flow of electrons in a circuit.

• The resistance to the flow of electrons.

• The amount of energy consumed by a device.

What is the primary role of voltage in an electrical circuit?

• To measure the amount of current.

• To provide resistance to electron flow.

• To push electrons and create current.

• To convert AC to DC.

What unit is used to measure electric current?

• Volts

• Ohms

• Watts

• Amperes

Which type of current is typically used for electronic devices like laptops and mobile phones, and why?

• Alternating Current (AC) because it can be transported efficiently over long distances.

• Direct Current (DC) because it allows for more compact and controllable circuits.

• Alternating Current (AC) because it flows in only one direction.

• Direct Current (DC) because it is more efficient for long-distance power transmission.

How is current measured in an electrical circuit?

• By connecting a voltmeter in parallel with the component.

• By connecting an ammeter in series with the component.

• By connecting a multimeter in parallel with the power source.

• By connecting a wattmeter to determine energy consumption.

How should an ammeter be connected in a circuit to measure current?

• In parallel

• In series

• In a separate circuit

• Directly to the power source

What happens to the current in a series circuit when measured at different points?

• It increases

• It decreases

• It remains the same

• It fluctuates randomly

If a second lamp is added in series to a circuit, what effect does it have on the total current flowing from the battery?

• The total current increases

• The total current decreases

• The total current remains the same

• The total current becomes zero

In a parallel circuit with two lamps of equal resistance, how does the current from the battery distribute among the lamps?

• All current flows through one lamp

• The current is split equally between the lamps

• More current flows through the lamp with higher resistance

• Less current flows through the lamp with lower resistance

What is the primary purpose of resistors, fuses, and circuit breakers in an electrical circuit?

• To increase the voltage

• To generate more power

• To control and protect against excessive current

• To store electrical energy