Magnetic effects

Which is correct about solonoid

• The strength of solonoid increases if we place a soft iron rod inside it

• The magnetic field lines around solonoid is similar to bar magnet

• The strength of solonoid will increase if the no of turns increase

• All 3

Who discovered magnetic effects

• Newton

• Orested

• None

Which of the following deflects in the presence of a magnetic field

• Ammeter

• Galvanometer

• Compass

• Both 2 and 3

Straight conducter works based on the

• Fleming's left hand rule

• Clock rule

• Fleming's right hand rule

• Right hand thumb rule

In a electric motor does the brushes rotate

• Yes

• No

In an electric motor does are the spilt rings are

• Conducters

• Conducting from outside and are insulaters on the inner side

• Insulaters

• Insulaters from outside and conducters from inside

Electric generator converts

• Electrical energy to mechanical energy

• Electrical energy to light energy

• Heat energy to electrical energy

• Mechanical energy to electrical energy

Electric motor converts

• Mechanical energy to electrical energy

• Heat energy to electrical energy

• Electrical energy to mechanical energy

• Electrical energy to light energy

Fleming's right hand rule is used in

• Motor

• Generator

• None

Ways of increasing strength of magnetic feild in solonoid

• Increasing the number of coils

• Increasing the current

• Keeping soft iron in the centre

• All 3