Science Quiz 84

This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?

120

Temporary magnets are used in

motors

generators

loud-speakers

all of the above

Correct! Wrong!

A magnetic field exists around

copper

aluminium

moving charges

none

Correct! Wrong!

The magnetism left in the iron after exciting field has been removed is known as

Magnetic potential

Relative permeability

Flux density

residual magnetism

Correct! Wrong!

Strength of an electromagnet can be increased by

increasing the cross-sectional area

increasing the number of turns

increasing current supply

all above methods

Correct! Wrong!

The retentivity (a property) of material is useful for the construction of

non-magnetic substances

permanent magnets

transformers

electromagnets

Correct! Wrong!

If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Decreases

Is zero

Increases

none

Correct! Wrong!

Which of the following is not a unit of flux?

Telsa

Maxwell

Weber

none

Correct! Wrong!

The materials having low retentivity are suitable for making

heating magnets

permanent magnets

temporary magnets

weak magnets

Correct! Wrong!

Science Quiz 84

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Science Quiz 84

Temporary magnets are used in

A magnetic field exists around

The magnetism left in the iron after exciting field has been removed is known as

Strength of an electromagnet can be increased by

The retentivity (a property) of material is useful for the construction of

If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Which of the following is not a unit of flux?

The materials having low retentivity are suitable for making

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Science Quiz 84

Temporary magnets are used in

A magnetic field exists around

The magnetism left in the iron after exciting field has been removed is known as

Strength of an electromagnet can be increased by

The retentivity (a property) of material is useful for the construction of

If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Which of the following is not a unit of flux?

The materials having low retentivity are suitable for making

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Science Quiz 85

Science Quiz 83

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