A thick wire and a thin wire of the same material are successively connected to the same circuit to find their respective resistance. Which one will have lower resistance ? Give reason.
A thick wire and a thin wire of the same material are successively connected to the same circuit to find their respective resistance. Which one will have lower resistance ? Give reason.
Thick wire will have lower resistance because resistivity is inversely proportional to the area of cross-section of the conductor.
Similar Questions
In the circuit shown below, calculate
$(a)$ total resistance in arm $CE,$
$(b)$ total current drawn from the battery, and
$(c)$ current in each arm, i.e., $A B$ and $C E$ of the circuit.
In the circuit shown below, calculate
$(a)$ total resistance in arm $CE,$
$(b)$ total current drawn from the battery, and
$(c)$ current in each arm, i.e., $A B$ and $C E$ of the circuit.
Calculate the number of electrons that would flow per second through the cross$-$section of a wire when $1 \,A$ current flows in it.
Calculate the number of electrons that would flow per second through the cross$-$section of a wire when $1 \,A$ current flows in it.
$B_1, B_2$ and $B_3$ are three identical bulbs connected as shown in Figure. When all the three bulbs glow, a current of $3\,A$ is recorded by the ammeter $A$.
$(i)$ What happens to the glow of the other two bulbs when the bulb $B_1$ gets fused?
$(ii)$ What happens to the reading of $A_1, A_2, A_3$ and $A$ when the bulb $B_2$ gets fused?
$(iii)$ How much power is dissipated in the circuit when all the three bulbs glow together?
$B_1, B_2$ and $B_3$ are three identical bulbs connected as shown in Figure. When all the three bulbs glow, a current of $3\,A$ is recorded by the ammeter $A$.
$(i)$ What happens to the glow of the other two bulbs when the bulb $B_1$ gets fused?
$(ii)$ What happens to the reading of $A_1, A_2, A_3$ and $A$ when the bulb $B_2$ gets fused?
$(iii)$ How much power is dissipated in the circuit when all the three bulbs glow together?
An electric kettle consumes $1\, kW$ of electric power when operated at $220\, V$. A fuse wire of what rating (in $A$) must be used for it?
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The amount of charge passing through a cell in four second is $12 \,C .$ Find the current supplied by cell.
The amount of charge passing through a cell in four second is $12 \,C .$ Find the current supplied by cell.