Electricity

Question 0

Definition of electrical resistance

Answer 0

Theresistanceofanelectricalcomponentisdefinedastheratioof the potential difference acrossthecomponenttothecurrentflowingthroughit.

Question 1

Effective resistance for resistors connected in parallel?

Answer 1

1/Effective resistance=1/R1 + 1/R2 +1/R3…

Question 2

Ohm’s law

Answer 2

Ohm’s law states that the current flowing in a metallic conductor is directly proportional to the current flowing through it, provided that physical condition are kept constant.

Question 3

E.m.f. Definition and formula

Answer 3

Theelectromotiveforce(e.m.f.)ofanelectricalenergysourceisdefinedastheworkdonebythesourceindrivingaunitchargeroundacompletecircuit.

E=W/Q

Question 4

Current

Answer 4

Rate of flow of electrical charges

Question 5

Potential difference: definition and formula

Answer 5

The potential difference between two points in an electrical circuit is defined as the amount of electrical energy converted to other forms of energy when one coulomb of positive charge passes btw these two points.

V=W/Q