Download App

Science MCQ (1 Marks)

Electricity: Circuits and their Components · Gujarat Board (GSEB) STD 7 (GSEB - English Medium). 33 questions.

Questions

MCQ (1 Marks)

Take a timed test

33 questions · 29 auto-graded MCQ + 4 self-marked written.

MCQ 11 Mark
Choose the incorrect, statement.
  • ✓
    A switch is the source of electric current in a circuit.
  • B
    A switch helps to complete or break the circuit.
  • C
    A switch helps us to use electricity as per our requirement.
  • D
    When the switch is in ‘OFF’ position, there is an air gap between its terminals.
Answer
Correct option: A.
A switch is the source of electric current in a circuit.
A
View full question & answer→
MCQ 21 Mark
When a switch is in the ‘OFF’ position:
(i) Oil from water
(ii) Sand from water
(iii) Cream from milk
(iv) Oxygen from air
Choose the combination of correct answers from the following:
  • A
    All are correct
  • ✓
    (ii) and (iii) are correct
  • C
    Only (iv) is correct
  • D
    Only (i) and (ii) are correct
Answer
Correct option: B.
(ii) and (iii) are correct
B
View full question & answer→
MCQ 31 Mark
In an electric circuit, what happens when the switch is in the ‘OFF’ position?
  • ✓
    The circuit is open, and no current flows
  • B
    The circuit is closed, and current flows
  • C
    The bulb lights up
  • D
    The battery gets charged
Answer
Correct option: A.
The circuit is open, and no current flows
A
View full question & answer→
MCQ 41 Mark
What does the symbol of a resistor look like in an electrical circuit diagram?
  • ✓
    A zigzag line
  • B
    A circuit with a cross inside
  • C
    A rectangle
  • D
    A straight line
Answer
Correct option: A.
A zigzag line
A
View full question & answer→
MCQ 51 Mark
Which of the following components is used to store electrical energy?
  • ✓
    Battery
  • B
    Switch
  • C
    Wire
  • D
    Bulb
Answer
Correct option: A.
Battery
A
View full question & answer→
MCQ 61 Mark
What is the function of a switch in a circuit?
  • A
    To increase the current
  • B
    To decrease the voltage
  • ✓
    To control the flow of current
  • D
    To provide energy to the circuit
Answer
Correct option: C.
To control the flow of current
C
View full question & answer→
MCQ 81 Mark
The flow of electric current in a circuit is caused by:
  • A
    Batteries
  • B
    Conductors
  • C
    Switches
  • D
    None of the above?
Answer
self
View full question & answer→
MCQ 91 Mark
Which of the following is a basic component of an electric circuit?
  • A
    Light bulb
  • B
    Battery
  • C
    Switch
  • D
    All of the above
Answer
self
View full question & answer→
MCQ 111 Mark
In a circuit diagram, the symbol  Imagerepresents:
  • A
    A battery
  • B
    A switch
  • C
    A resistor
  • ✓
    A cell
Answer
Correct option: D.
A cell
D
View full question & answer→
MCQ 121 Mark
Why are rubber and plastic used in electric wires?
  • A
    They are colourful
  • B
    They are conductors
  • ✓
    They are insulators
  • D
    They are flexible metals
Answer
Correct option: C.
They are insulators
C
View full question & answer→
MCQ 131 Mark
Which of these components emits light containing a filament?
  • ✓
    Incandescent bulb
  • B
    LED
  • C
    Fluorescent tube
  • D
    Switch
Answer
Correct option: A.
Incandescent bulb
A
View full question & answer→
MCQ 141 Mark
Why does a fused bulb not glow?
  • A
    It has no filament
  • B
    Its glass is broken
  • ✓
    The filament is broken
  • D
    It has no base
Answer
Correct option: C.
The filament is broken
C
View full question & answer→
MCQ 151 Mark
What does a switch do in an electric circuit?
  • A
    Changes direction of current
  • B
    Increases voltage
  • ✓
    Connects or disconnects the circuit
  • D
    Stores electric energy
Answer
Correct option: C.
Connects or disconnects the circuit
C
View full question & answer→
MCQ 161 Mark
Which of the following is essential to complete a circuit?
  • A
    Air
  • B
    Insulator
  • ✓
    Conductor
  • D
    Magnet
Answer
Correct option: C.
Conductor
C
View full question & answer→
MCQ 191 Mark
What happens when an LED is connected in reverse?
  • A
    It glows brighter
  • B
    It breaks
  • ✓
    It does not glow
  • D
    It glows dimly
Answer
Correct option: C.
It does not glow
C
View full question & answer→
MCQ 201 Mark
In an LED, the longer leg is:
  • A
    Negative terminal
  • B
    Neutral
  • ✓
    Positive terminal
  • D
    Inactive
Answer
Correct option: C.
Positive terminal
C
View full question & answer→
MCQ 211 Mark
Which terminal of the electric cell is a flat metal disc?
  • A
    Positive
  • ✓
    Negative
  • C
    Both of these
  • D
    None of these
Answer
Correct option: B.
Negative
B
View full question & answer→
MCQ 221 Mark
The filament in a bulb glows due to:
  • A
    Sound
  • B
    Air
  • ✓
    Heat generated by electric current
  • D
    Light
Answer
Correct option: C.
Heat generated by electric current
C
View full question & answer→
MCQ 251 Mark
Which of these completes an electric circuit?
  • A
    Insulator
  • B
    Air gap
  • ✓
    Switch in ON position
  • D
    Fused bulb
Answer
Correct option: C.
Switch in ON position
C
View full question & answer→
MCQ 271 Mark
A symbol helps in:
  • A
    Confusing learners
  • ✓
    Shortening circuit explanation
  • C
    Making the circuit large
  • D
    Breaking it
Answer
Correct option: B.
Shortening circuit explanation
B
View full question & answer→
MCQ 281 Mark
Which is a correct pair?
  • A
    LED - Filament
  • B
    Battery - Insulator
  • ✓
    Cell - Energy source
  • D
    Switch - Earth wire
Answer
Correct option: C.
Cell - Energy source
C
View full question & answer→
MCQ 301 Mark
The longer wire in an LED is:
  • A
    Negative
  • ✓
    Positive
  • C
    Either (a) or (b)
  • D
    Neither (a) nor (b)
Answer
Correct option: B.
Positive
B
View full question & answer→
MCQ 311 Mark
What is the purpose of insulation on wires?
  • A
    Decoration
  • ✓
    Protect from shocks
  • C
    Attract electricity
  • D
    Help conduct
Answer
Correct option: B.
Protect from shocks
B
View full question & answer→
Generate Paper FreeAll Electricity: Circuits and their Components topics
MCQ (1 Marks) - Science STD 7 Questions - Vidyadip