current electricity

current electricity

Kircchhaff's rule

Introduction

• Simple circuits

• Complex circuits

• Current rule

• Voltage rule

Current rule

• Algebraic sum of the currents at any junction of a circuit is zero

• Law of conservation of electric charge

• Current entering junction - +

• Current leaving junction - _

Current rule

Voltage rule

The algebraic sum of the products of the current and resistance of each part of the circuit is equal to the total emf included in the circuit

Multiple Choice

Kirchhaff's first rule is also called voltage rule.

• true

• false

Multiple Choice

Kirchhoff's rule can be used to find ___________ and voltage in the circuit.

• potential difference

• energy

• current

• none of the above

Multiple Choice

What is the unit we use to measure electric current?

• ampere (amp)

• ohm

• volt

• newton