Physics - General Knowledge Questions and Answers

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When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?

Nine times

Three times

Six times

One–third

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Fleming's right hand rule is used to find the direction of the

Alternate current

Direct current

Induced current

Actual current

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A current carrying conductor is associated with

A magnetic field

An electric field

An electro-magnetic field

An electrostatic field

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In order to make an electromagnet you need a

Dry cell batteries

Thin coated copper wire

Iron nail

All of the above

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Which of the following is not a part of a CRT ?

Phosphor screen

Shadow mask

Electron gun

Gas plasma

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Slip rings are usually made of

Aluminium

Copper

Phosphor Bronze

Carbon

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The safest hammers are those with heads that are

Cast steel and chiseled

Alloy and drop-forged steel

Welded and alloyed

Chiseled and drop forged

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The function of ball bearings in a wheel is :

To increase friction

To convert kinetic friction into rolling friction

To convert static friction into kinetic friction

Just for convenience

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Gear finishing operation is called

Burnishing

Hobbing

Shaping

Milling