Three resistors

PHYSICS · Subjective · CBSE · Physics · Electricity · Electricity

Problem

Three resistors

R_{1}

R_{2}

and

R_{3}

are connected in series with a dc source. (i) Define a series circuit and state any two characteristic features of current and potential difference in such a circuit. (ii) Explain, with reasons, why the same current flows through each resistor while the potential difference divides among them. (iii) Show that the equivalent resistance

R_{s}

of the combination is equal to the algebraic sum

R_{1}+R_{2}+R_{3}

. (iv) If

R_{1}=3\,\Omega

R_{2}=5\,\Omega

and

R_{3}=7\,\Omega

, calculate the ratio of the potential difference across

R_{2}

to that across

R_{3}

Related theory

Ohm's Law
Ohm's Law (Macroscopic)
Resistors in Series
Resistor Networks
Combination of resistances
Electricity
Electric Circuits
Ohm's law, V-I graphs and ohmic/non-ohmic conductors

Browse the problem library