Circuit

Electric Circuits

Md. Takvir Anam

Lecturer

Dept. of EEE

Green University of Bangladesh

1. To know about simple circuits.

2. To classify circuits

3. To be familiar with circuit protection.

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Objectives

​The simplest circuit I can show you.

1. Must be a closed path

2. Must have a power source

Not a circuit

Elements connected in the manner shown

1. Single current through the loop

​Series Circuit

Elements connected in the manner shown

1. Various currents in various loops.

​Parallel Circuit

When a person completes a loop in the circuit.

Electric Shock

If you must touch an electric circuit, keep in mind that

1. The circuit is deactivated.

2. If the circuit is activated, make sure you are touching the ground wire and standing on the ground.

​How not to get Shocked

Multiple Choice

Current doesn't flow in a circuit if ____________ is not there.

• A light bulb

• An open loop

• A closed loop

• A switch

Multiple Choice

Will the bulb light up?

• Yes

• No

Multiple Choice

If the switch is closed, which bulb will light up?

• The bulb on the top

• The bulb on the bottom

• Both of them

• None of them

Multiple Choice

A fifth grade class constructed this circuit.  Which of these objects most likely made the light glow when connected to points X and Y?

• A toothpick

• A metal string

• A cotton pad

• Tissue paper

Multiple Select

A group of students built the circuit shown above. Which statement explains this observation?

• The bell will ring

• The bulb will lit

• Both will be off

• The bulb is not the part of a complete circuit

Multiple Choice

Will the bat get shocked?

• Yes

• No

Draw

Active the bulb and the buzzer