GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When two magnets pull apart or push together it is called ____
A
magnetic force
B
magnetic poles
C
magnetic field
D
magnetic field lines
Explanation: 

Detailed explanation-1: -The force that causes the attraction or repulsion between magnets is known as the magnetic force. Ferromagnetic materials such as iron, nickel, etc are drawn to magnets because their electrons spin, and the resulting “magnetic moments” easily align and stay aligned even in the absence of an external magnetic field.

Detailed explanation-2: -Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few ‘magnetic’ metals and not all matter. Magnets are attracted to and repel other magnets.

Detailed explanation-3: -Magnetic fields exert forces on other moving charges. The force a magnetic field exerts on a charge q moving with velocity v is called the magnetic Lorentz force. It is given by. F = qv × B. (The SI unit of B is Ns/(Cm) = T (Tesla))

Detailed explanation-4: -That is, they are forced together (this is called attraction). If two magnets are pointing with like-poles together (a south pole to a south pole OR north to north), then stored-up energy will decrease if they move apart.

Detailed explanation-5: -The force that a magnet exerts is called magnetic force. The force is exerted over a distance and includes forces of attraction and repulsion.

There is 1 question to complete.