Define one ampere.
Define one ampere.
The current through a conductor is said to be $1$ ampere, if a charge of $1$ coulomb flows through it in $1$ second.
Similar Questions
Draw the nature of $V -I$ graph for a nichrome wire. $(V -$ Potential difference, $I -$ Current)
$A$ metallic wire of $625\, mm$ length offers a $4\, \Omega$ resistance. If the resistivity of the metal is $4.8 \times 10^{-7} \,ohm-metre$, then calculate the area of cross$-$ section of the wire.
Draw the nature of $V -I$ graph for a nichrome wire. $(V -$ Potential difference, $I -$ Current)
$A$ metallic wire of $625\, mm$ length offers a $4\, \Omega$ resistance. If the resistivity of the metal is $4.8 \times 10^{-7} \,ohm-metre$, then calculate the area of cross$-$ section of the wire.
What are the factors on which resistivity of a material depends ?
What are the factors on which resistivity of a material depends ?
Define current, give its mathematical expression. What is its $SI$ unit ?
Define current, give its mathematical expression. What is its $SI$ unit ?
State reasons for the following
$(a)$ Tungsten is used for making bulb filaments.
$(b)$ Copper and aluminium are generally used for electricity transmission.
$(c)$ Alloys are commonly used in electrical heating devices such as electric iron and toaster.
State reasons for the following
$(a)$ Tungsten is used for making bulb filaments.
$(b)$ Copper and aluminium are generally used for electricity transmission.
$(c)$ Alloys are commonly used in electrical heating devices such as electric iron and toaster.
$(a)$ How is the direction of electric current related to the direction of flow of electrons in a wire ?
$(b)$ Calculate the current in a circuit, if $500 \,C$ of charge passes through it in $10$ minutes.
$(a)$ How is the direction of electric current related to the direction of flow of electrons in a wire ?
$(b)$ Calculate the current in a circuit, if $500 \,C$ of charge passes through it in $10$ minutes.