Elements of electric toasters and electric iron are made of an alloy rather than a pure metal. Give two reasons to justify the statement.
Elements of electric toasters and electric iron are made of an alloy rather than a pure metal. Give two reasons to justify the statement.
$(a)$ Alloys do not oxidise readily at high temperature, so they are more resistant to corrosion.
$(b)$ Alloys have lower electrical conductivity than pure metals.
Similar Questions
In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same length and same material, but $A$ is thicker than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same length and same material, but $A$ is thicker than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
The distllled water acts as ........ for the electricity.
The distllled water acts as ........ for the electricity.
When is potential difference between two points said to be $1$ volt ?
When is potential difference between two points said to be $1$ volt ?
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
State the formula co$-$relating the electric current flowing in a conductor and the voltage applied across it. Also, show this relationship by drawing a graph. What would be the resistance of a conductor, if the current flowing through it is $0.35$ ampere when the potential difference across it is $1.4$ volt ?
State $a$. difference between the wire used in the element of an electric heater and in a fuse wire.
State $a$. difference between the wire used in the element of an electric heater and in a fuse wire.