coils of electric toasters and electric irons are mode of an alloy (generally nichrome) due to the following two reasons: (i) Resistivity of an alloy is generally higher than that of pure metals, hence for a given resistance we need a coil of lesser length. (ii) At high temperatures, an alloy does nRead more
coils of electric toasters and electric irons are mode of an alloy (generally nichrome) due to the following two reasons:
(i) Resistivity of an alloy is generally higher than that of pure metals, hence for a given resistance we need a coil of lesser length.
(ii) At high temperatures, an alloy does not oxidise (burn) readily. Hence, coil of an alloy has longer life.
The current flows more easily through a thick wire as compared to a thin wire of the same material, when connected to the same source. It is due to the reason that resistance of a thick wire is less than that of a thin wire.
The current flows more easily through a thick wire as compared to a thin wire of the same material, when connected to the same source. It is due to the reason that resistance of a thick wire is less than that of a thin wire.
What determines the rate at which energy is delivered by a current?
Electric power of a circuit determines the rate at which energy is delivered by a current.
Electric power of a circuit determines the rate at which energy is delivered by a current.
See lessWhy are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
coils of electric toasters and electric irons are mode of an alloy (generally nichrome) due to the following two reasons: (i) Resistivity of an alloy is generally higher than that of pure metals, hence for a given resistance we need a coil of lesser length. (ii) At high temperatures, an alloy does nRead more
coils of electric toasters and electric irons are mode of an alloy (generally nichrome) due to the following two reasons:
See less(i) Resistivity of an alloy is generally higher than that of pure metals, hence for a given resistance we need a coil of lesser length.
(ii) At high temperatures, an alloy does not oxidise (burn) readily. Hence, coil of an alloy has longer life.
Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?
The current flows more easily through a thick wire as compared to a thin wire of the same material, when connected to the same source. It is due to the reason that resistance of a thick wire is less than that of a thin wire.
The current flows more easily through a thick wire as compared to a thin wire of the same material, when connected to the same source. It is due to the reason that resistance of a thick wire is less than that of a thin wire.
See lessOn what factors does the resistance of a conductor depend?
The resistance of a conductor depends on Length, Area of cross-section, Nature of the material of the conductor and Temperature of the conductor.
The resistance of a conductor depends on Length, Area of cross-section, Nature of the material of the conductor and Temperature of the conductor.
See lessName a device that helps to maintain a potential difference across a conductor.
Potential difference across a conductor can be maintained by means of a battery consisting of one or more cells.
Potential difference across a conductor can be maintained by means of a battery consisting of one or more cells.
See less