Understanding Electric Current Types

The video explains electricity, starting with its natural occurrence in lightning, and how scientists have learned to generate and control it. It describes electric current, measured in amperes, and distinguishes between direct current (DC) and alternating current (AC). DC, with its constant flow, is ideal for portable devices, while AC, with its fluctuating nature, is efficient for long-distance transmission. The video compares AC and DC, highlighting their respective advantages and applications, and concludes with their essential roles in modern life.

What natural phenomenon is used to illustrate the concept of electricity in the video?

• Tornado

• Volcano

• Lightning

• Earthquake

How is electric current measured?

• In watts

• In volts

• In ohms

• In amperes

Which type of current flows steadily in one direction?

• Alternating Current (AC)

• Variable Current

• Direct Current (DC)

• Static Current

What makes DC ideal for storing energy in batteries?

• Its high voltage levels

• Its ability to change direction

• Its constant voltage and direction

• Its fluctuating nature

What is a key advantage of AC for long-distance transmission?

• It is easier to store in batteries

• It allows voltages to be stepped up using transformers

• It maintains a constant voltage

• It can be easily converted to DC

How often does AC typically change direction per second?

• 30 times

• 90 times

• 60 times

• 120 times

What device is used to convert AC to DC for storage?

• Transformer

• Rectifier

• Inverter

• Capacitor

Why is AC not directly stored in batteries?

• It is too stable

• It is too expensive

• It causes constant charging and discharging

• It has a low voltage

What can the fluctuating nature of AC potentially damage?

• Batteries

• Sensitive electronic components

• Capacitors

• Resistors

Which type of current is preferred for powering sensitive electronic devices?

• Alternating Current (AC)

• Direct Current (DC)

• Static Current

• Variable Current