Magnetism And Electromagnetism Flashcards

1
Q

What are the two poles ?

A

North and south

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2
Q

where is the magnetic field strongest ?

A

Near the poles

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3
Q

What type of force is magnetism non contact or contact ?

A

Non contact

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4
Q

How do you increase an electro magnet ?

A

Increase current

Increase turns

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5
Q

What happens when a current flows through a wire ?

A

A magnetic field is created around it

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6
Q

Where is the magnetic field greater ?

A

Closer to the wire

Increased current

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7
Q

What is a solenoid ?

A

Coiled up wire

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8
Q

What’s an solenoid with an iron core called ?

A

Electromagnet

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9
Q

What does an electromagnet consist of ?

A

Solenoid ( coil of wire )

Iron core

Current

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10
Q

What are electromagnets used for ?

A

Door bells

Scrapyard cranes

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11
Q

What is the motor effect explanation ?

A

wire carrying a current creates a magnetic field. This can interact with another magnetic field, causing a force that pushes the wire at right angles. This is called the motor effec

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12
Q

How do you remember Fleming left hand rule ?

A

M F C

Movement

Field

Current

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13
Q

What’s Fleming left hand rule used for ?

A

The direction of a motor effect

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14
Q

What do the transformers do ?

A

a step-up transformer increases the voltage

a step-down transformer reduces the voltage

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15
Q

What is a transformer ?

A

A device that can change voltage

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