A __________________ cycle lasts 11 years, whereas a ________________ cycle lasts 22 years
Fill in the blank(s) with correct word
sunspot, solar magnetic
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Induction: A negatively-charged plastic rod is brought close to (but does not touch) a neutral metal sphere that is connected to ground. After waiting a few seconds, the ground connection is removed (without touching the sphere), and after that the rod is also removed. The sphere is now
A. negatively charged. B. positively charged. C. neutral.
A toroid is made of 2000 turns of wire of radius 2.00 cm formed into a donut-shape of inner radius 10.0 cm and outer radius 14.0 cm. When a 30.0-A current is present in the toroid, the magnetic field at a distance of 11.0 cm from the center of the toroid is
A. 0.0857 T. B. 0.109 T. C. 0.120 T. D. 0.600 T. E. 0.685 T.
If a red filter were placed in front of blue dungarees, you would see
A) white. B) green. C) blue. D) red. E) black.
A system consisting of a negatively-charged particle and an electric field
a. gains potential difference and kinetic energy when the charged particle moves in the direction of the field. b. loses electric potential energy when the charged particle moves in the direction of the field. c. gains kinetic energy when the charged particle moves in the direction of the field. d. gains electric potential energy when the charged particle moves in the direction of the field. e. gains potential difference and electric potential energy when the charged particle moves in the direction of the field.