Question 405: Current Electricity

Question

A network of four resistances is connected to $9 \mathrm{~V}$ battery, as shown in figure. The magnitude of voltage difference between the points $\mathrm{A}$ and $\mathrm{B}$ is __________ $V$.

Accepted Answer

In the circuit $I=\frac{9}{3}=3 \mathrm{~A}$
$$
\mathrm{V}_{\mathrm{C}}-\mathrm{V}_{\mathrm{A}}=2 	imes 1.5=3~~......(I)
$$
$$
\mathrm{V}_{\mathrm{C}}-\mathrm{V}_{\mathrm{B}}=4 	imes 1.5=6~~......(II)
$$
$\mathrm{Eq}^{\mathrm{n}}(\mathrm{II})-\mathrm{Eq}^{\mathrm{n}}(\mathrm{I})$
$$
\mathrm{V}_{\mathrm{A}}-\mathrm{V}_{\mathrm{B}}=6-3=3 	ext { Volt }
$$

Current Electricity

A network of four resistances is connected to 9 \mathrm{~V} battery, as shown in figure. The magnitude of voltage difference between the points \mathrm{A} and \mathrm{B} is __________ V.

Choose the correct answer: