Physics
Grade-7
Easy
Question
Electromagnet loses its magnetic property when
- The current is switched OFF
- Current is switched ON
- Heat is increased
- The current is very high
The correct answer is: The current is switched OFF
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Magnetic effects of current were discovered by:
Magnetic effects of current were discovered by:
PhysicsGrade-7
Physics
Choose the correct statement about an electric fuse.
Choose the correct statement about an electric fuse.
PhysicsGrade-7
Physics
DIRECTIONS: Read the following two statements carefully and choose the correct options.
Statement 1: The heating up of a thin conducting wire on passing an electric current through it is called the heating effect of current.
Statement 2: Various electrical appliances that are based on the heating effect of current contain a coil of wire called an element.
DIRECTIONS: Read the following two statements carefully and choose the correct options.
Statement 1: The heating up of a thin conducting wire on passing an electric current through it is called the heating effect of current.
Statement 2: Various electrical appliances that are based on the heating effect of current contain a coil of wire called an element.
PhysicsGrade-7
Physics
In which one of the following conditions the amount of heat produced in a current-carrying wire will increase?
In which one of the following conditions the amount of heat produced in a current-carrying wire will increase?
PhysicsGrade-7
Physics
When current is passed through a conductor, the heat produced in it depends upon
I. The material of the conductor
II. The current flowing through the conductor
III. The time for which the current flows
When current is passed through a conductor, the heat produced in it depends upon
I. The material of the conductor
II. The current flowing through the conductor
III. The time for which the current flows
PhysicsGrade-7
Physics
Which has no importance for fuse wire?
Which has no importance for fuse wire?
PhysicsGrade-7
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The given images show a
The given images show a
PhysicsGrade-7
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In which of the following circuits bulb will glow?
In which of the following circuits bulb will glow?
PhysicsGrade-7
Physics
It is a part of an electric bulb, and it glows when an electric current is switched on. It is
It is a part of an electric bulb, and it glows when an electric current is switched on. It is
PhysicsGrade-7
Physics
Which of the following statements is correct about a switch?
Which of the following statements is correct about a switch?
PhysicsGrade-7
Physics
An electric bulb gives us light due to the ___________ effect of electric current.
An electric bulb gives us light due to the ___________ effect of electric current.
PhysicsGrade-7
Physics
DIRECTIONS: Based on the following diagram/picture, answer the questions given below: In the circuit diagram shown below, the bulb lights up when
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
Physics
The heating element is not a part of which one of the following electrical appliances?
The heating element is not a part of which one of the following electrical appliances?
PhysicsGrade-7
Physics
Fuse wire is made up of alloys of
Fuse wire is made up of alloys of
PhysicsGrade-7
Physics
The filament of an electric bulb is made up of
The filament of an electric bulb is made up of
PhysicsGrade-7
