Science
In Activity 12.7, how do we think the displacement of rod AB will be affected if:
(i) current in rod AB is increased;
(ii) a stronger horse-shoe magnet is used; and
(iii) length of the rod AB is increased?
Answer
(i) The displacement of rod AB increases when current is increased. This is because the magnetic force experienced by the rod increases with increased current leading to larger displacement of the rod.
(ii) The displacement of rod AB increases when a stronger horse-shoe magnet is used. This is because the magnetic force experienced by the rod increases with increase in the strength of magnetic field leading to larger displacement of the rod.
(iii) The displacement of rod AB increases when its length is increased. This is because the magnetic force experienced by the rod increases with increased length leading to larger displacement of the rod.
Related Questions
Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current- is zero.
- decreases as we move towards its end.
- increases as we move towards its end.
- is the same at all points.
Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)
- Mass
- Speed
- Velocity
- Momentum
A positively-charged particle (alpha-particle) projected towards the west is deflected towards north by a magnetic field. The direction of magnetic field is
- towards south
- towards east
- downward
- upward
Name two safety measures commonly used in electric circuits and appliances.