Question 169Electricity & Electronics - Assistant Engineer

The correct answer is C) increases magnetic pull on the plunger and requires less current to trip the relay. When the plunger is raised further into the magnetic circuit of a magnetic-type overload relay, it increases the magnetic pull on the plunger. This increased magnetic pull requires less current to overcome the magnetic force and trip the relay. In other words, raising the plunger makes the relay more sensitive and causes it to trip at a lower current. The other options are incorrect because: A) and D) state that raising the plunger would reduce the magnetic pull, which is the opposite of what actually happens. B) states that raising the plunger would require less current to trip the relay, which is also incorrect.