Hysteresis, Permanent Magnets and Electromagnets

JEE Main Physics · Magnetism and Matter · 3 questions, latest first

• The coercivity of a magnet is 5 × 10^3 A / m. The amount of current required to be passed in a solenoid of length 30 cm and the…20248 April, Shift 2 · Q57
• The current required to be passed through a solenoid of 15 cm length and 60 turns in order to demagnetise a bar magnet of…202310 April, Shift 1 · Q59
• Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Electromagnets…20238 April, Shift 2 · Q49