You are given a resistance wire of length $50 \,cm$ and a battery of negligible resistance. In which of the following cases is the largest amount of heat generated

  • A

    when only half of the wire is connected to the battery.

  • B

    when the wire is divided into two equal parts and both the parts are connected in parallel.

  • C

    when the wire is connected to the battery directly.

  • D

    when the wire is divided into four equal parts and all the four parts are connected in parallel.

Similar Questions

The equivalent resistance between points $A$ and $B$ in the following electric circuit is $.....$

Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of $1.5\, V$, $5\, \Omega, 10\, \Omega$ and $15\, \Omega$ resistors and a plug key, all connected in series.

$1\;kWh =\ldots\ldots$ $joule$  

Calculate the number of electrons constituting one coulomb of charge.

(Charge on one electron $=1.6 \times 10^{-19} C$ )

You are qiven three bulbs of $25 \,W , 40\, W$ and $60 \,W$ marked at $220\, V$. Which one of them has lowest resistance ?