What does a motor do?
  • Using the electrical energy it produces light.
  • It provides electrical energy.
  • Using the electrical energy it make it's spindle rotate.
  • don't know
What is this circuit component?
  • Battery
  • Wire
  • Cell
  • Bulb
Is this the positive side or the negative side?
  • Positive
  • Negative
A student connects an electric cell and a lamp using two wires. One wire connects the positive terminal of the cell to the lamp, but the second wire is left unconnected. What is the most appropriate conclusion?
  • The lamp will glow dimly.
  • The circuit is incomplete, so current cannot flow.
  • The cell supplies electricity only through one wire.
  • The lamp will glow after some time.
Which observation confirms that electric current is flowing through a circuit containing an incandescent lamp?
  • The switch is metallic.
  • The lamp glows.
  • The battery contains two cells.
  • The wires are long.
Four students make the following statements: I. A complete path is necessary for current to flow. II. A lamp glows only when current passes through it. III. An open circuit allows current to flow. IV. A switch can break a circuit. Which statements are correct?
  • I and II only
  • I, II and IV only
  • II, III and IV only
  • I, III and IV only
An incandescent lamp is connected correctly to an electric cell, yet it does not glow. According to the textbook, which is the most likely reason?
  • The lamp has fused.
  • The wires are too thick.
  • The battery contains only one cell.
  • The switch is too close to the battery.
Which action changes an open circuit into a closed circuit?
  • Removing the battery
  • Disconnecting a wire
  • Moving the switch to the ON position
  • Replacing the lamp with another lamp
A switch is moved from OFF to ON without changing any other part of the circuit. Which change must occur?
  • The battery stores more energy.
  • The circuit becomes complete.
  • The lamp changes polarity.
  • The wires become conductors.
Which statement about the position of a switch is correct?
  • It must always be connected near the lamp.
  • It must always be connected near the battery.
  • It can be placed anywhere in the circuit.
  • It should never be connected between two wires.
Which situation represents an open circuit?
  • The switch is ON and the lamp glows.
  • The switch is OFF, leaving a gap in the circuit.
  • The battery has two cells.
  • The wires are made of copper.
Which statement best explains the role of an electric switch?
  • It generates electric current.
  • It stores electrical energy.
  • It controls current by completing or breaking the circuit.
  • It converts electrical energy into light.
What is the purpose of using standard symbols in circuit diagrams?
  • Increase current flow.
  • Reduce the number of components.
  • Make circuits easier to draw and understand.
  • Improve battery life.
In the symbol of an electric cell, the longer line represents the:
  • Negative terminal.
  • Wire.
  • Positive terminal.
  • Switch.
If a student incorrectly labels the longer line in a cell symbol as the negative terminal, which concept is affected?
  • Direction of current.
  • Function of the switch.
  • Shape of the lamp.
  • Material of the wire.
In the symbol of an LED, the triangle indicates:
  • The brightness of the LED.
  • The direction in which current can flow.
  • The positive terminal only.
  • The colour of emitted light.
In the LED symbol, the two arrows indicate that the LED:
  • Stores current.
  • Blocks current.
  • Emits light.
  • Produces heat.
Which statement about circuit diagrams is correct?
  • They use photographs of components.
  • They are drawn using standard symbols.
Why are standard electrical symbols used worldwide?
  • To make batteries stronger
  • To increase safety only
  • To help people understand circuits in the same way
  • To reduce manufacturing cost
A tester lamp glows when connected across Object X. Which conclusion is fully justified?
  • Object X is a conductor
  • Object X is copper
  • Object X is silver
  • Object X is magnetic
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0