16. Which is a unit of refractive index? kWh W/s Omega.m Unitless 17. Electrical

Question

16. Which is a unit of refractive index? kWh W/s Omega.m Unitless 17. Electrical charges and magnetic poles have many similarities. but one difference is: a. opposite magnetic poles repel. b. one magnetic pole cannot create magnetic poles in other material. c. a magnetic pole cannot be isolated. d. magnetic poles do not produce magnetic fields. 18. A stir magnetic material has which property? a. It cannot he magnetized b. It is easy to magnetize c. It is hard to magnetize d. It attracts slowly moving charges 19. The presence of magnetic fields can be detected by a. north pole b. compass needle

Explanation / Answer

16) (d) no units

17) (c) magnetic poles can not be isolated

18) (b) it is easy to magnetize

19) (b)compass needle

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