Ohm's law is true
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- 1The resistance of a conductor at $15^{\circ} {C}$ is $16\, \Omega$ and at $100\, {C}$ is $20\, \Omega$. What will be the temperature coefficient of resistance of the conductor?View Solution
- 2When two resistance are connected in parallel then the equivalent resistance is $\frac {6}{5}\Omega $ . When one of the resistance is removed then the effective resistance is $2\, \Omega $. The resistance of the wire removed will be ................ $\Omega$View Solution
- 3Two conductors made of the same material are connected across a common potential difference. Conductor $A$ has twice the diameter and twice the length of conductor $B$. The power delivered to the two conductors ${P_A}$ and ${P_B}$ respectively is such that ${P_A}/{P_B}$ equals toView Solution
- 4In a circuit shown in the figure, the capacitor $C$ is initially uncharged and the key $K$ is open. In this condition, a current of $1 \mathrm{~A}$ flows through the $1 \Omega$ resistor. The key is closed at time $t=t_0$. Which of the following statement($s$) is(are) correct?View Solution
[Given: $\mathrm{e}^{-1}=0.36$ ]
($A$) The value of the resistance $R$ is $3 \Omega$.
($B$) For $t$
($C$) At $t=t_0+7.2 \mu \mathrm{s}$, the current in the capacitor is $0.6 \mathrm{~A}$.
($D$) For $t \rightarrow \infty$, the charge on the capacitor is $12 \mu C$.
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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 $(D)$ $2:1$ - 6If power in $3\,\Omega $ is $27\,W$ then what is the power in $2\,\Omega $ ................ $\mathrm{W}$View Solution
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