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Ohms Law - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main
Quick Facts
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Ohms Law is considered one of the most asked concept.
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20 Questions around this concept.
Solve by difficulty
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then the error in the value of resistance of the wire is : (in %)
A 3-volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I (in Amperes) in the circuit will be
The current through the circuit is
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Consider a circuit as shown in Fig. We want to measure the current flowing in the circuit.
For this, we connect an ammeter of resistance RA in the circuit. The percentage error in the current is
Fuse wire is a wire of
Concepts Covered - 1
Ohms Law
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Ohm’s law
In a conductor, if all external physical conditions like temperature and pressure are kept constant the Current flowing through a conductor is directly proportional to the Potential difference across two ends.
$$
\begin{gathered}
V \propto I \\
V=I R
\end{gathered}
$$
$R$ - Electric Resistance
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The graph between V and I
The slope gives the resistance
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The graph between V and I at different temperatures
Here$\mathrm{T} 1>\mathrm{T} 2$.The resistance of a conductor increases with increase in temperature
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