Basic Physics

Dimensional Anlysis 4

Dimensional Anlysis 3

Dimensional Anlysis 2

Dimensional Anlysis

Current Electricity

Three identical capacitors are in series, equivalent capacitance is 1micro farad, find the equivalent capacitance when they are in parallel. Find also the ratio of energy stored when both combination are connected with same source of emf.
Answer: 9 micro farad, 1:3

Find the Capacitance of a parallel plate capacitor of area of each plate is 4 square metres and distance between two plates is 0.2 m and dielectric constant between two plates is 6?
We know that, Capacitance of parallel plate capacitor is
C= ε.κ A/d
=9×10⁹×6×4/
0.2 Farad =

Two equal and opposite parallel forces of 12N each acts on two different points of a body of length 3m, if their line of action makes 30⁰ with one force find the torque(τ)
act on the body?
Torque = FLSinθ
=12×3×Sin30
=12×3×(1/2)
=18 Nm

Voltage drop

Circuit theory

Solution continued