Chapter 13: Electrical Systems

Electrical components affect the output of an electrical system by:

• changing the voltage, current, or resistance in the circuit.

• only increasing the power output.

• having no effect on the system's output.

• making the system work without any energy input.

Which of the following best describes some benefits and risks associated with the applications of electrical systems?

• They can improve efficiency and convenience but may pose safety hazards and environmental concerns.

• They only provide benefits with no associated risks.

• They are mainly used for entertainment purposes only.

• They eliminate the need for any safety precautions.

Reducing the consumption of electrical energy can be achieved by:

• Using energy-efficient appliances

• Leaving lights on when not needed

• Using old and inefficient devices

• Increasing the use of electrical gadgets unnecessarily

What is the heating effect of an electric current? (e.g., heating of electric iron, electric bulb)

What is the mechanical effect of an electric current?

What is the magnetic effect of an electric current?

What is the chemical effect of an electric current?

An electric current can cause a chemical change when it is passed through certain chemical solutions or liquids.

• True

• False

The chemical effect of an electric current is used in _______ and extraction of metals. (Fill in the blank)

Which process can minimise damage and lengthen the lifespan of surgical instruments?

• Electroplating

• Melting

• Painting

• Freezing