Figure, shows a network of seven resistors number 1 to 7,...

Figure, shows a network of seven resistors number 1 to 7, each equal to $1 \Omega$ connection to a $4 \mathrm{~V}$ battery of negligible internal resistance The current I in the circuit is....
(A) $0.5 \mathrm{~A}$
(B) $1.5 \mathrm{~A}$
(C) $2.0 \mathrm{~A}$
(D) $3.5 \mathrm{~A}$

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Key Concepts

Ohm's Law

Ohm's Law is a fundamental principle in electrical circuits that relates voltage, current, and resistance through the equation V = IR. This relationship is essential for determining the current flowing in a circuit when the voltage and resistance are known.

Series and Parallel Resistors

Understanding the configuration of resistors is crucial in circuit analysis. In series connections, resistances add directly, while in parallel connections, the equivalent resistance is determined by the reciprocal of the sum of reciprocals of the individual resistances. This knowledge helps in reducing complex circuits into simpler forms.

Equivalent Resistance

Equivalent resistance is the single resistance that can replace a network of resistors without changing the overall behavior of the circuit. By calculating the equivalent resistance of a complex network, one can apply Ohm's Law more easily to determine the total current or voltage across the network.

Voltage Source

A voltage source is a component that supplies a constant potential difference to a circuit. In circuit analysis, an ideal voltage source is assumed to have negligible internal resistance, thereby providing a steady voltage that drives current through the circuit.

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