Which object is most likely to make the tester lamp glow?
  • Plastic ruler
  • Wooden stick
  • Metal key
  • Rubber eraser
Which object is least likely to allow current to pass?
  • Coin
  • Aluminium foil
  • Plastic scale
  • Sewing needle
A circuit works properly with a copper wire. If only that wire is replaced with a plastic strip, what will most likely happen?
  • The lamp glows brighter
  • The lamp glows dimly
  • The lamp does not glow
  • The battery becomes weak
Why are metals generally used to make electrical wires?
  • They are transparent.
  • They are conductors of electricity.
  • They are lighter than plastic.
  • They produce electricity.
According to the textbook, why is copper commonly used for electrical wiring?
  • It is the strongest metal.
  • It is inexpensive compared with silver and is abundantly available.
  • It is the only conductor.
  • It is an insulator.
Which group contains only electrical insulators?
  • Copper, Silver, Gold
  • Plastic, Rubber, Ceramics
  • Iron, Copper, Aluminium
  • Aluminium, Glass, Copper
Which statement correctly explains the covering of electrical wires?
  • It improves conductivity.
  • It increases current flow.
  • It protects people from electric shocks.
  • It stores electrical energy.
Which statement about the human body is correct according to the textbook?
  • It is an electrical insulator.
  • It is a poor conductor.
  • It conducts electricity.
  • It blocks electric current completely.
Which practice follows the safety advice given in the textbook?
  • Touching switches with wet hands
  • Using damaged plugs
  • Handling electrical appliances with dry hands
  • Repairing live wires without protection
A student says, "If the switch is OFF, current can still flow because the battery is connected." Which textbook concept disproves this statement?
  • Conductors increase voltage
  • An open circuit prevents current flow
  • Batteries work only with LEDs
  • Lamps need two batteries
Which change alone will certainly stop current from flowing in a working circuit?
  • Moving the switch to OFF
  • Shortening the connecting wires
  • Replacing one copper wire with another
  • Moving the battery to another position in the circuit
Which statement correctly compares conductors and insulators?
  • Both allow current to pass easily
  • Conductors allow current to pass, while insulators do not
  • Insulators allow more current than conductors
  • Conductors and insulators have the same function in a circuit
A student builds a tester and checks four objects. The lamp glows for a coin and a metal key but not for a wooden stick or plastic ruler. Which conclusion best matches the textbook?
  • Only shiny objects conduct electricity
  • Metals are conductors, while materials like wood and plastic act as insulators
  • Plastic becomes a conductor only in a tester
  • Wood conducts better than metal
What is a current?
  • A constant flow of electricity
  • A path that a current can flow along
What is a circuit?
  • A constant flow of electricity
  • A path that a current can flow along
Gives a constant supply of electrons.
  • Power source
  • Load
  • Energy Pathway
A device that uses electricity.
  • Load
  • Battery Source
  • Energy pathway
What are the 3 basic components of a circuit?
  • Energy source, Load, Energy Pathway
  • Battery, Energy source, Energy Pathway
  • Battery, Wire, Energy Pathway
  • ALL of them
A wire is an example of _____.
  • Battery source
  • Energy pathway
  • Load
  • All of them
Which unit is current measured in?
  • Volts
  • Amps
  • Coulombs
  • Ohms
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