Download App
A certain piece of silver of given mass is to be made like a wire. Which of the following combination of length $(L)$ and the area of cross-sectional $(A) $ will lead to the smallest resistance
  • A$L$ and $A$
  • B$2L$ and $A/2$
  • C$L/2$ and $2 A$
  • D
    Any of the above, because volume of silver remains same
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.*
Download App

Similar Questions

  • 1
    Find out the value of current through $2\,\Omega$ resistance for the given circuit ............ $A$
    View Solution
  • 2
    The current flowing through a conductor connected across a source is $2\,A$ and $1.2\,A$ at $0^{\circ}\,C$ and $100^{\circ}\,C$ respectively. The current flowing through the conductor at $50^{\circ}\,C$ will be $......\times 10^2\,mA$.
    View Solution
  • 3
    If $2.2\,kW$ power is transmitted through a $100\,\Omega $ line at $22,000\,V,$ the power loss in the form of heat will be ............. $W$
    View Solution
  • 4
    Each element in the finite chain of resistors shown in the figure is $1\,\Omega $. A current of $1\, A$ flows through the final element. Then what is the potential difference $V$ across input terminals of the chain ............... $\mathrm{volt}$
    View Solution
  • 5
    The resistor of resistance '$R$' is connected to $25\, V$ supply and heat produced in it is $25\, J/sec$. The value of $R$ is .......... $\Omega $
    View Solution
  • 6
    In the part of a circuit shown in the figure, the potential difference $(V_G -V_H)$ between points $G$ and $H$ will be ............... $V$
    View Solution
  • 7
    Resistance of rod is calculated by measuring its length with help of meter scale of least count $1\ mm$ . Its radius is measured with help of screw gauge having $50$ division on circular scale and pitch is of $1\ mm$ . Resistivity of material is exact. Length of the wire is found to be $20\ cm$ and diameter of wire is $4\ mm$ . Find the percentage error in calculation of resistance ............... $\%$
    View Solution
  • 8
    In the figure shown, if the internal resistance of the battery is $1\, ohm$ , the reading of the ammeter will be ................. $\mathrm{A}$
    View Solution
  • 9
    In the circuits shown below, the readings of the voltmeters and the ammeters will be
    View Solution
  • 10
    A heating coil can heat the water of a vessel from $20\,^oC$ to $60\,^oC$ in $30$ minutes. Two such heating coils are put in series and then used to heat the same amount of water through the same temperature range. The time taken now will be ............ $min$ (neglecting thermal capacity of the coils)
    View Solution