13.3 Benefits and Risks of Electrical Systems

What are the effects produced by an electric current? (Select all possible options)

• chemical

• heating

• physical

• magnetic

This method of coating objects with metals is called .........................

Which of the following metal(s) have antimicrobial properties to minimise infection when coating medical instruments? (Select all possible options)

• aluminium

• gold

• silver

• copper

This metal is biocompatible and used to coat hip and knee implants

A heating element must be made of materials that: (Select all possible options)

• can conduct electricity

• have high resistance to convey electrical energy to heat energy

• have low resistance to convey electrical energy to heat energy

• withstand high temperature

How can the magnetic effect of an electromagnet be increased? (Select all possible options)

• Increase the number of coils around the wire

• Decrease the number of coils around the wire

• Increase the number of battery

• Increase the voltage of the battery used

Which effect of electric current is observed in the incubator?

• magnetic

• chemical

• heating

A large current can pass through our body even if we do not directly touch a live wire

• True

• False

Which of the following symbol represents a fuse?

• 
• 
• 
• 

Which number represents the fuse in a 3-pin plug?

• 1

• 2

• 4

• 5