Capacitors

Capacitor is a device used to store ----

• electric charge and power

• electric charge and electric energy

• electric energy and power

• power and potential

SI unit of capacitance is

• Coulomb per newton

• Coulomb per volt

• volt per meter

• .newton

Total charge stored in the Capacitor is

• infinity

• zero

• 100 micro farad

• increases

The work done is stored as ---------in the capacitor.

• magnetic energy

• electrical energy

• electrostatic potential energy

• kinetic energy

Energy density in the capacitor is depends only on the

• capacitance

• electric field

• size

• potential

If dielectric is inserted ,When the battery is connected the electric filed is

• increases

• constant

• decreases

• zero

If three resistors connected in parallel connection ,then effective resistance is ----μF, C₁=5μF, C₂=10μF,C₃=15μF

• 15

• 5

• 20

• 30

If dielectric is inserted, When the battery is connected the capacitance is

• decreases

• increases

• constant

• zero

Capacitance of the capacitor is

• C=εA/ d

• C=Ad

• C₀= ε₀ A/d

• C=εAd

Capacitors is used to ---------- the efficiency of power transmission

• increase

• decrease