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Physics > P7- Magnetism And Electromagnetism > Flashcards

P7- Magnetism And Electromagnetism Flashcards

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1
Q

What is the property of a material that allows it to create a magnetic field?

A

Ferromagnetism

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2
Q

True or False: A magnetic field is produced by a moving electric charge.

A

True

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3
Q

What is the SI unit of magnetic field strength?

A

Tesla (T)

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4
Q

What is the direction of the magnetic field lines around a current-carrying wire?

A

Circular, following the right-hand grip rule

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5
Q

What is the relationship between the magnetic field strength and the current in a solenoid?

A

Directly proportional

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6
Q

What is the effect of increasing the number of turns in a coil on the magnetic field strength?

A

Increases the magnetic field strength

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7
Q

What is the process of producing a magnetic field using electricity called?

A

Electromagnetism

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8
Q

What is the component of an electric motor that converts electrical energy into mechanical energy?

A

Armature

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9
Q

What is the direction of the force experienced by a current-carrying wire in a magnetic field?

A

Perpendicular to both the wire and the magnetic field, following Fleming’s left-hand rule

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10
Q

What is the device used to measure electric current?

A

Ammeter

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11
Q

What is the device used to measure potential difference?

A

Voltmeter

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12
Q

What is the relationship between the magnetic field strength and the distance from a current-carrying wire?

A

Inverse proportional

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13
Q

What is the phenomenon where a changing magnetic field induces an electromotive force in a circuit?

A

Electromagnetic induction

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14
Q

What is the device used to convert mechanical energy into electrical energy?

A

Generator

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15
Q

What is the law that states that the induced electromotive force in a circuit is proportional to the rate of change of magnetic field flux?

A

Faraday’s law of electromagnetic induction

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16
Q

What type of transformer increases voltage and decreases current?

A

Step-up transformer

17
Q

What type of transformer decreases voltage and increases current?

A

Step-down transformer

18
Q

What is the device that uses electromagnetic induction to store energy?

A

Inductor

19
Q

What is the material used to enhance the magnetic field in an electromagnet?

A

Soft iron core

20
Q

What is the unit of electromotive force?

A

Volt (V)

21
Q

What is the relationship between the number of coils in a transformer’s primary and secondary coils?

A

Inversely proportional

22
Q

What is the term for a material that retains its magnetism after the magnetic field is removed?

A

Permanent magnet

23
Q

What is the effect of increasing the current in a solenoid on the magnetic field strength?

A

Increases the magnetic field strength

24
Q

What is the relationship between the magnetic field strength and the distance from a magnet?

A

Inverse square proportional

25
Q

What is the component of a transformer that transfers energy between the primary and secondary coils?

A

Iron core

Physics (8 decks)

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