# GEOLOGY

## EARTH SCIENCE

### MAGNETISM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Both solenoids and electromagnets use ____ and ____ to produce strong magnetic fields.
 A coiled wires and electric current B magnets and coiled wires C electricity and coiled rope D None of the above
Explanation:

Detailed explanation-1: -Both solenoids and electromagnets use electric current and coiled wires to produce strong magnetic fields. Solenoids – by running current through a wire which is wound into many loops, you strengthen the magnetic field in the center of the coil.

Detailed explanation-2: -The magnetic field of an electromagnet may be hundreds of times stronger than the magnetic field of just the solenoid.

Detailed explanation-3: -The field inside a solenoid is strong and uniform. The small magnetic fields caused by the current in each turn of the coil add together to make a stronger overall magnetic field. The strength of the magnetic field around a solenoid can be increased by: increasing the number of turns on the coil.

Detailed explanation-4: -A solenoid (/ˈsoʊlənɔɪd/) is a type of electromagnet formed by a helical coil of wire whose length is substantially greater than its diameter, which generates a controlled magnetic field. The coil can produce a uniform magnetic field in a volume of space when an electric current is passed through it.

Detailed explanation-5: -Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

There is 1 question to complete.