Physics
Grade-9
Easy
Question
On what principle does a fuse works?
- Fuse works on the principle of the chemical effects of current.
- Fuse works on the principle of the magnetic effects of current.
- Fuse works on the principle of the heating effects of current.
- Fuse works on the principle of the magnetic and heating effects of current.
The correct answer is: Fuse works on the principle of the heating effects of current.
Electrical fuse works on the principle of heating effect of electric current. When a current more than the rated amount passes through a fuse, it melts due to excessive heating and breaks the circuit and the current stops flowing.
Fuse works on the principle of the heating effects of current.
Related Questions to study
Physics
In the following circuit connect a fuse that will protect the load if a current greater than 10A, which is the current rating of the load, flows through it.
In the following circuit connect a fuse that will protect the load if a current greater than 10A, which is the current rating of the load, flows through it.
PhysicsGrade-9
Physics
Which of the following fuse will blow first if a current of 8.1 A is passed through the circuit?
Which of the following fuse will blow first if a current of 8.1 A is passed through the circuit?
PhysicsGrade-9
Physics
If a wire which carries a current of 6.2 A at normal conditions is subjected to 10 A of current, then
If a wire which carries a current of 6.2 A at normal conditions is subjected to 10 A of current, then
PhysicsGrade-9
Physics
Complete the sentence:
The advantage of a circuit breaker over a fuse is that
Complete the sentence:
The advantage of a circuit breaker over a fuse is that
PhysicsGrade-9
Physics
What happens to the current when a circuit breaker trips?
What happens to the current when a circuit breaker trips?
PhysicsGrade-9
Physics
When does a circuit breaker trip?
When does a circuit breaker trip?
PhysicsGrade-9
Physics
The device which can be used in place of a fuse is
The device which can be used in place of a fuse is
PhysicsGrade-9
Physics
To make a fuse withstand high current, the fuse wire
To make a fuse withstand high current, the fuse wire
PhysicsGrade-9
Physics
Earth leakage is defined as
Earth leakage is defined as
PhysicsGrade-9
Physics
Metallic case or body of an electric appliance is earthed
Metallic case or body of an electric appliance is earthed
PhysicsGrade-9
Physics
In parallel connection of loads
In parallel connection of loads
PhysicsGrade-9
Physics
When does a fuse blow off?
When does a fuse blow off?
PhysicsGrade-9
Physics
Complete the sentence:
The fuse wire is made of low melting point material because
Complete the sentence:
The fuse wire is made of low melting point material because
PhysicsGrade-9
Physics
A safety device that is connected in series with the live wire in the circuit which blows off when excess current flows is called
A safety device that is connected in series with the live wire in the circuit which blows off when excess current flows is called
PhysicsGrade-9