Q. Variation of current and voltage in a conductor has been shown in figure-$3.304$. The resistance of the conductor is.

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A

$4\, \Omega$

B

$2 \,\Omega$

C

$3\, \Omega$

D

$1 \,\Omega$

Solution:

Resistance of a conductor is given by reciprocal of the slope of I-V curve. This graph shown in figure has a slope $1 / 2$ so the resistance of conductor is $2\, \Omega$.

Questions from Current Electricity

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2. In the network shown in figure, each resistance is equal to $2 \Omega$. The resistance between the points $A$ and $B$ is

3. A letter ' $A$ ' is constructed from a uniform wire with resistance $1.0\, \Omega$ per $cm .$ The sides of the letter are $20\, cm$ and the cross piece in the middle is $10\, cm$ long. The apex angle is $60^{\circ} .$ The resistance between the ends of the legs is

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For which of these junctions, is the following equation correct ?
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5. A battery of emf, $10\, V$ is connected to resistances as shown in figure. The potential difference $V_{A}-V_{B}$ between the points $A$ and $B$ is

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