Nichrome is used to make the element of electric heater. Why ?
Nichrome is used to make the element of electric heater. Why ?
It is an alloy with high resistivity and high melting point.
Similar Questions
$(a)$ Nichrome wire of length $L^{\prime}$ and radius ${ }^{\prime} R^{\prime}$ has resistance of $10\, \Omega$. How would the resistance of the wire change when
$(i)$ only length of the wire is doubled ?
$(ii)$ only diameter of the wire is doubled ? Justify your answer.
$(b)$ Why element of electrical heating devices are made$-$up of alloys ?
$(a)$ Nichrome wire of length $L^{\prime}$ and radius ${ }^{\prime} R^{\prime}$ has resistance of $10\, \Omega$. How would the resistance of the wire change when
$(i)$ only length of the wire is doubled ?
$(ii)$ only diameter of the wire is doubled ? Justify your answer.
$(b)$ Why element of electrical heating devices are made$-$up of alloys ?
Two lamps, one is rated $100\, W$ at $220\, V$, and the other $60 \,W$ at $220\, V ,$ are connected in parallel to a $220\, V$ supply. Find the current drawn from the supply line.
Two lamps, one is rated $100\, W$ at $220\, V$, and the other $60 \,W$ at $220\, V ,$ are connected in parallel to a $220\, V$ supply. Find the current drawn from the supply line.
Of which physical quantity is the $joule/coulomb$ a unit?
Of which physical quantity is the $joule/coulomb$ a unit?
How much work is done in moving a charge of $2\, C$ across two points having a potential difference $12 \,V ?$
How much work is done in moving a charge of $2\, C$ across two points having a potential difference $12 \,V ?$
You are given three equal resistors. The number of resistances which can be obtained by joining them in series and in parallel grouping is
You are given three equal resistors. The number of resistances which can be obtained by joining them in series and in parallel grouping is