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प्रश्न
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उत्तर
The fuse helps to control the maximum current in an electrical circuit. The fuse protects an electrical circuit by melting and breaking the circuit, whenever the current exceeds the pre-determined limit in the circuit. Due to low melting point, the fuse wire melts and then breaks the circuit.
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संबंधित प्रश्न
The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity?
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
Define the following:
Super conductors
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
Name any two devices, which are working on the heating effect of the electric current.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
An ammeter is always placed in parallel with the circuit.
