PRE UPS 2 SP025 set 1

Which statement is TRUE about formula F = qv × B to describe the charge moving in uniform magnetic field

 

• A. F must be perpendicular to q, v and B. 

• B. F must be perpendicular to B only.

• C. F must be perpendicular to both v and B.

• D. F must be perpendicular to v only

Which of the following is NOT the sources of the magnetic field?

• Current-carrying conductor

• Earth magnetic field

• Stationary charge particle

• Bar magnet

An electron enters a uniform magnetic field perpendicularly, it will be

• Moving in a straight line

• Unaffected

• Moving in parabolic path

• Moving in circular path

Magnetic field is defined as

• A region or space around a magnet or a current carrying conductor in which a magnetic

     force is experienced.

• Area of a magnet around a magnetic force.

• Lines with arrows.

• Does not depend on the current but is directly proportional to the radius of a circular

       coil.

The production of electric current by a changing magnetic field is called ____________________________________.

• induced current

• electromotive force

• electromagnetic induction

• internal resistance

Faraday’s Law states that the magnitude of the induced e.m.f. is _________________ to the rate of change of magnetic flux linkage with the solenoid.

• equal

• inversely proportional

• directly proportional

The unit of magnetic flux is the

• Henry
• Tesla
• Faraday
• Weber

Magnetic flux is defined as

• Multiplication of the magnetic field, B and area, A

• Dot product of the magnetic field, B and area, A

• The ratio of the magnetic field, B and area, A

• Cross product of the magnetic field, B and area, A

Ratio of induced e.m.f in a coil to the rate of change of current in another coil nearby was known as

• mutual inductance

• flux linkage

• self-inductance

At what angle between the magnetic field, B and plane Area A, the magnetic

flux is equal to zero?

• 90°

• 0°

• 45°

• 180°