Physics
Grade-7
Easy
Question
It is a part of an electric bulb, and it glows when an electric current is switched on. It is
- A filament
- An element
- A-coil
- A bulb
Hint:
A filament
The correct answer is: A filament
Due to the heating effect of electric current, the bulb glows when the electric current passes through it. The filament of the bulb gets heated to a high temperature and it starts glowing.
Related Questions to study
Physics
Which of the following statements is correct about a switch?
- It allows the flow of electricity.
- It controls the power of the batteries.
- It fuses a bulb.
- It controls the brightness of a bulb.
Which of the following statements is correct about a switch?
PhysicsGrade-7
- It allows the flow of electricity.
- It controls the power of the batteries.
- It fuses a bulb.
- It controls the brightness of a bulb.
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An electric bulb gives us light due to the ___________ effect of electric current.
- Heating
- Magnetic
- Chemical
- All of the above
An electric bulb gives us light due to the ___________ effect of electric current.
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- Heating
- Magnetic
- Chemical
- All of the above
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DIRECTIONS: Based on the following diagram/picture, answer the questions given below: In the circuit diagram shown below, the bulb lights up when

- A and B are open, but C is closed
- A and B are closed, but C is open
- A is open, but B and C are closed
- Both B and C are open, but A is closed
DIRECTIONS: Based on the following diagram/picture, answer the questions given below: In the circuit diagram shown below, the bulb lights up when

PhysicsGrade-7
- A and B are open, but C is closed
- A and B are closed, but C is open
- A is open, but B and C are closed
- Both B and C are open, but A is closed
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The heating element is not a part of which one of the following electrical appliances?
- Electric cooker
- Electric toaster
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The heating element is not a part of which one of the following electrical appliances?
PhysicsGrade-7
- Electric cooker
- Electric toaster
- Electric fan
- Soldering iron
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Fuse wire is made up of alloys of
- High boiling point
- High melting point
- Low melting point
- Low boiling point
Fuse wire is made up of alloys of
PhysicsGrade-7
- High boiling point
- High melting point
- Low melting point
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The filament of an electric bulb is made up of
- Tungsten
- Silver
- Copper
- Nichrome
The filament of an electric bulb is made up of
PhysicsGrade-7
- Tungsten
- Silver
- Copper
- Nichrome
Physics
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

- A→ (p), B→ (q), C→ (r), D→ (s)
- A→ (p), B→ (q), C→ (s), D→ (r)
- A→ (q), B→ (p), C→ (r), D→ (s)
- A→ (q), B → (p), C→ (s), D→ (r)
DIRECTIONS: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

PhysicsGrade-7
- A→ (p), B→ (q), C→ (r), D→ (s)
- A→ (p), B→ (q), C→ (s), D→ (r)
- A→ (q), B→ (p), C→ (r), D→ (s)
- A→ (q), B → (p), C→ (s), D→ (r)
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There is a coil of wire in an electric iron. This coil of wire is known as
- Spring
- Element
- Component
- Circuit
There is a coil of wire in an electric iron. This coil of wire is known as
PhysicsGrade-7
- Spring
- Element
- Component
- Circuit
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A fuse is used in an electrical circuit to
- Indicate the consumption of power
- Maintain a constant voltage
- Maintain the constant current
- Break the circuit in case of excess current
A fuse is used in an electrical circuit to
PhysicsGrade-7
- Indicate the consumption of power
- Maintain a constant voltage
- Maintain the constant current
- Break the circuit in case of excess current
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Coils of heating devices are made up of
- Nichrome
- Tungsten
- Mercury
- Copper
Coils of heating devices are made up of
PhysicsGrade-7
- Nichrome
- Tungsten
- Mercury
- Copper
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The heating effect of electric current is used in
- Bread toaster
- Electric watch
- Switch
- None of these
The heating effect of electric current is used in
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- Bread toaster
- Electric watch
- Switch
- None of these
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A fuse wire is made up of alloy
- Tin-lead
- Constantan
- Manganin
- Nichrome
A fuse wire is made up of alloy
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- Tin-lead
- Constantan
- Manganin
- Nichrome
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How many bulbs are there in the given circuit diagram?

- 1
- 2
- 3
- 5
How many bulbs are there in the given circuit diagram?

PhysicsGrade-7
- 1
- 2
- 3
- 5
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How many resisters are there in the given circuit diagram?

- 1
- 2
- 3
- 5
How many resisters are there in the given circuit diagram?

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- 1
- 2
- 3
- 5
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Nichrome is used as a coil of heater because
- High resistance and low melting point
- It has high resistance and high melting point
- Low resistance and high melting point
- None of the above
Nichrome is used as a coil of heater because
PhysicsGrade-7
- High resistance and low melting point
- It has high resistance and high melting point
- Low resistance and high melting point
- None of the above