unit 3

Question 1

electric field strength

Answer 1

force acting per unit positive charge placed at that point

Question 2

how much is 1eV in J

Answer 2

1eV = 1.6 x 10^-19

Question 3

what is the electrostatic potential

Answer 3

at a point is the work done in moving a unit positive charge from infinity to that point

Question 4

whats the electrostatic potential at infinity

Answer 4

0

Question 5

what is ferromagnetism

Answer 5

in which the magnetic dipoles of the atoms can be made to line up in regions called magnetic domains, resulting in the material illustrating or having the ability to become magnetised

Question 6

what is magnetic induction

Answer 6

one tesla is the magnetic induction of a magnetic field in which a conductor of length one metre, carrying a current of one ampere perpendicular to the field, is acted on by a force by one newton

Question 7

the size of the magnetic induction depends on

Answer 7

the current in the wire
the distance from the wire