Definitions

Question 1

Magnetic field

Answer 1

It is a region in space where there is a force on magnetic poles

Question 2

Hall probe

Answer 2

It consist of a very small slice of semi-conducting material

Question 3

Advantages of hall probe

Answer 3

It is very small and can be used fo measure B at a point

Question 4

The magnetic flux density

Answer 4

It is defined as the force per unit length per unit current flowing in a conductor which is perpendicular to the field

Question 5

One Tesla

Answer 5

It is defined as the magnetic flux density of a field in which a Force of 1N acts on a conductor of length 1 m, which is carrying a current of 1 A and is perpendicular to the field

Question 6

Ampere

Answer 6

The ampere is that current which when flowing in each of two infinitely-long parallel straight wires of negligible cross-sectional area separated by a distance of 1 meter in vacuum produces a force of 2*10^7 N/m between the wires

Question 7

Velocity selector

Answer 7

It is to select charge particles of a single velocity from a beam of charges which are of different velocities