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Actuators

Authored by Tracy Sciberras

Design, Education

10th Grade

Used 9+ times

Actuators
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17 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In a DC Motor, the coil of the rotor turns into an electromagnet when

the rotor rotates inside the stator

electricity (current) flows through the coil

the rotor is turned by the axle

the it sits int the field of the stator

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An electromagnet can be made with a coil of wire around a nail if

the wire is magnetized by a compass

the wire has a current running through it

the wire is touching 2 magnet

the nail is touching a battery on the anode

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The greater the number of windings (the number of times it is wrapped around) in an electromagnet's coil

the stronger the magnet is

the less the magnet will pick up

the more current it takes to create the electromagnet

the slower the compass needle moves to the wire

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Relay is an electromagnetically operated switch. It has coil and contacts.

True

False

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The part which creates magnetic field when it is energized to attract the relay's armature is.

Coil

Spring

NO Contact

All of the above

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

When the the current flows through the coil of the relay, it will produce magnetic field which will attract the armature to close the NO contact.

True

False

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All electric currents produces a magnetic field

True
False

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