electrical lighting

which light bulb is the most energy efficient?

• Incandescent bulb

• Compact fluorescent

• LED bulb

• Halogen bulb

A material in which electrons are able to move easily is....

• Circuit
• Insulator 
• Resistance 
• Conductor 

1. A lamp with a poor ground connection will cause:

• The lamp to be brighter.

• The bulb to blow.

• The circuit fuse to blow.

• The lamp to be dim.

1. An LED is a type of:

• Diode used in rectifiers.

• Electronic sensor.

• Transistor that emits light.

• Diode that emits light.

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery
• the buzzer is made of special plastic
• the wires are cooled by the surrounding air
• electricity can flow in a complete path

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

What type of circuit is shown?

• Parallel

• Series

• Open

• Motor
• Mouse
• Ground
• Fuse

• Battery
• Fuse
• Diode
• Switch (open)

• Buzzer
• Switch (Open)
• Diode
• Horn