Quarter3_Quiz1 (Technology10)AY2023-24

It is an alarm that produces an audible alarm tone when electrical energy is applied.

• Sensor

• Electric Bell

• Push button switch

• Annunciator

It consists of a wire wound in a coil. When an electric current passes through the wire, it generates a magnetic field around it.

• Electric bell

• Electromagnet

• Adjustable contacts

• Piezo buzzer

This is a small ball attached to the armature which strikes the gong.

• Bell

• Adjustable contacts

• Hammer

• Dynamo

In electric bell, the switch also acts as ___.

• Circuit breaker

• Current regulator

• Voltage regulator

• Annunciator

It is an alarming device that produces a buzzing sound which is caused by the rapid vibration of armature.

• Annunciator

• Electric bell

• Sensor

• Buzzer

It is a thin sheet of electromagnetic materials which vibrates when electromagnet is energized and produces a buzzing sound.

• Buzzer

• Electromagnet

• Metal strip

• Gong bell

It consists of an oscillator, solenoid coil, magnet, vibration diaphragm, housing etc.

• Piezo buzzer

• Electromagnetic buzzer

• Mechanical buzzer

• Electromechanical buzzer

In this variant, the vibrating buzzer is mounted on the outer casing, instead of internally.

• Electromagnetic buzzer

• Piezo buzzer

• Electric buzzer

• Mechanical buzzer

A fire alarm would generally use a _____.

• Mechanical buzzer

• Piezo buzzer

• Electromagnetic buzzer

• Electromechanical buzzer

A microwave oven uses a ___ buzzer since its purpose is to notify the user.

• Electromagnetic

• Mechanical

• Piezo

• Electromechanical