Strong magnetic field in solenoid - Hydraulics & Pneumatics

Q.  How is strong magnetic field in a solenoid achieved?
- Published on 14 Aug 15

a. strong magnetic field in a solenoid is achieved, if coil acts as conductor
b. coil is surrounded by a iron frame
c. iron core is placed at the centre of the coil
d. all of the above

ANSWER: all of the above

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