Respuesta :
Question 1 - unlike or different poles
Question 2 - magnetic fields
Question 3 - 2
Question 4 - Iron, cobalt, and nickel
Question 5 - electrons
Question 6 - False
Question 7 - Electromagnets
Question 8 - True
Question 9 - molten iron in the Earth's core
Question 10 - True
Question 11 - False
I hope this helps
Question 1 (1 point)
Answer:
unlike or different poles
Explanation:
similar poles always repel each other while unlike poles always attracts each other
Question 2 (1 point)
Answer:
Magnetic fields
Explanation:
Magnetic field is due to magnetic poles i.e. magnetic field lines originates from North pole and terminates at south pole
Question 3 (1 point)
Answer:
2
Explanation:
All bar magnets must have two poles (1) North Pole (2) South Pole
Question 4 (1 point)
Answer:
iron, cobalt and Nickel
Explanation:
all materials which have small magnetic domains which will increase the magnetic field when placed in external field is magnetic materials
Question 5 (1 point)
Answer:
electrons
Explanation:
Due to spinning of electrons electric current will induce and this will induce a magnetic field and creates magnetism
Question 6 (1 point)
Answer:
FALSE
Explanation:
Magnetic pole strength is maximum at their poles position
Question 7 (1 point)
Answer:
Electromagnets
Explanation:
Electromagnets are devices that create a magnetic field through the application of electricity.
Question 8 (1 point)
Answer:
TRUE
Explanation:
By switch off the current we can turn off the magnetism of electromagnets
Question 9 (1 point)
Answer:
Molten iron in the Earth core
Explanation:
The earth has a protective magnetic field around it, that is created by molten iron in Earth core as it will induce electric current due to rotation of earth.
Question 10 (1 point)
Answer:
True
Explanation:
Doorbells, scrap yards, and rock concerts are all examples of every day uses of electromagnets as in all of the above devices we can control magnetism by controlling current.
Question 11 (1 point)
Answer:
FALSE
Explanation:
By the application of large number of turns and large magnitude of current Electromagnets can lift heavy objects.