Physics
Current Electricity: Tips for Circuits and Numericals
By Dr. Sandhya Classes Editorial Team · Published 2026-10-03 · Updated 2026-10-03 · 3 min read
Ohm's law, Kirchhoff's rules, Wheatstone bridge and potentiometer explained practically.
Physics at Dr. Sandhya Classes is taught personally by Dr. Sandhya, Ph.D. in Physics, teaching since 2015 — offline in Zirakpur (Highland Marg & Lohgarh Road) and online across India. About Dr. Sandhya
Think in terms of potential
Treat each point in a circuit as having a potential. Current flows from higher to lower potential through resistors.
Kirchhoff's rules
The junction rule conserves charge; the loop rule conserves energy. Use them systematically.
Simplify before solving
Look for series, parallel and balanced-bridge patterns before writing equations.
Instruments and experiments
Meter bridge and potentiometer questions reward understanding of the null-point idea.
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