The charge $q$ (in coulomb) passing through a $10 \, \Omega$ resistor as a function of time $t$ (in second) is given by $q = 3t^2 - 2t + 6$. The potential difference across the ends of the resistor at time $t = 5 \, s$ is: (in $V$)
- A$120$
- B$240$
- C$140$
- D$280$
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What conclusion can you draw from the following observations on a resistor made of alloy manganin?
$I (A)$ $V (V)$ $I (A)$ $V (V)$ $0.2$ $3.94$ $3.0$ $59.2$ $0.4$ $7.87$ $4.0$ $78.8$ $0.6$ $11.8$ $5.0$ $98.6$ $0.8$ $15.7$ $6.0$ $118.5$ $1.0$ $19.7$ $7.0$ $138.2$ $2.0$ $39.4$ $8.0$ $158.0$
| $I (A)$ | $V (V)$ | $I (A)$ | $V (V)$ |
| $0.2$ | $3.94$ | $3.0$ | $59.2$ |
| $0.4$ | $7.87$ | $4.0$ | $78.8$ |
| $0.6$ | $11.8$ | $5.0$ | $98.6$ |
| $0.8$ | $15.7$ | $6.0$ | $118.5$ |
| $1.0$ | $19.7$ | $7.0$ | $138.2$ |
| $2.0$ | $39.4$ | $8.0$ | $158.0$ |
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View SolutionWhich of the following graphs represents an ohmic resistance?
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View SolutionThe voltage $V$ and current $I$ graph for a conductor at two different temperatures $T_1$ and $T_2$ are shown in the figure. The relation between $T_1$ and $T_2$ is
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View SolutionThe $V-i$ graph for a conductor at temperatures $T_1$ and $T_2$ are as shown in the figure. $(T_2 - T_1)$ is proportional to
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View Solution$E$ is the electric field inside a conductor whose material has conductivity $\sigma$ and resistivity $\rho$. The current density inside the conductor is $J$. The correct form of Ohm's law is
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