The length of the wire is doubled. Its conductance will be
  • A
    Unchanged
  • B
    Halved
  • C
    Quadrupled
  • D$1/4$ of the original value
Easy
art

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Similar Questions

  • 1
    Match the List $I$ with the List $II$ from the combination shown. In the left side (List $I$) there are four different conditions and in the right side (List $II$), there are ratios of heat produced in each resistance for each condition :
    List $I$ List $II$ 
    $(I)$ Two wires of same resistance are connected in series and same current is passed through them $(A)$ $1:2$
    $(II)$ Two wires of resistance $R$ and $2R$ $ohm$ are connected in series and same $P . D .$ is applied across them $(B)$ $4:1$
    $(III)$ Two wires of same resistance are connected in parallel and same current is flowing through them $(C)$ $1:1$
    $(IV)$ Two wires of resistances in the ratio $1:  2$ are connected in parallel and same $P . D .$ is applied across the $(D)$ $2:1$
    View Solution
  • 2
    Consider the circuit shown in the figure
    View Solution
  • 3
    $A$ wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire is raised by $\Delta T$ in time $t. N$ number of similar cells is now connected in series with a wire of the same material and cross section but of length $2L$. The temperature of the wire is raised by the same amount $\Delta T$ in the same time $t$. The value of $N$ is :
    View Solution
  • 4
    A platinum resistance thermometer has a resistance of $50\,\Omega $ at $20\,^o C$. When dipped in a liquid the resistance becomes $76.8\,\Omega $. The temperature coefficient of resistance for platinum is $\alpha = 3.92 \times {10^{ - 3}}\,^o C$. The temperature of the liquid is .............. $^o C$
    View Solution
  • 5
    Following figures show different combinations of identical bulb$(s)$ connected to identical battery$(ies)$. Which option is correct regarding the total power dissipated in the circuit?
    View Solution
  • 6
    The ratio of heat dissipated per second through the resistance $5 \Omega$ and $10 \Omega$ in the circuit given below is: :
    View Solution
  • 7
    In the following circuit, bulb rated as $1.5\, V$, $0.45\, W$. If bulbs glows with full intensity then what will be the equivalent resistance between $X$ and $Y$ ............. $\Omega$
    View Solution
  • 8
    In the circuit shown, the reading of the ammeter (ideal) is the same with both switches  open as with both closed find the value of resistance $R$ in $ohm$ . ................ $\Omega$
    View Solution
  • 9
    For the given circuit, in the steady state, $\left| V _{ B }- V _{ D }\right|=.......V.$
    View Solution
  • 10
    Two wires of resistance $R_1$ and $R_2$ have temperature coefficient of resistance ${\alpha _1\,}{\rm{ and \,}}{\alpha _2}$, respectively. These are joined in series. The effective temperature coefficient of resistance is
    View Solution