A pivoted bar with slots falls through a magnetic field. The bar falls the quickest if it is made of [Assume identical plate and slot dimensions. Ignore air resistance.]
A. copper
B. a ferromagnetic
C. aluminium
D. plastic
Answer:D
A pivoted bar with slots falls through a magnetic field. The bar falls the quickest if it is made of [Assume identical plate and slot dimensions. Ignore air resistance.]
A. copper B. a ferromagnetic C. aluminium D. plastic