Two charged bodies separated by a distance d exert an electrical force on each other. The distance d is doubled. The electrical force on each body is now 1/2 of the original force
a. True
b. False
Indicate whether the statement is true or false
False
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Which of the following metals is least likely to be suitable for wire drawing?
(a) Magnesium (b) Aluminum (c) Copper (d) Iron
Would you expect the wire temperature to be greater or less for a number 18 copper wire as compared to a number 14 copper wire, both conducting the same electrical current?
What will be an ideal response?
Which has the larger light-gathering power?
a. A telescope of 5 cm diameter and focal length of 50 cm. b. A telescope of 6 cm diameter and focal length of 100 cm. c. A telescope of 2 cm diameter and focal length of 100 cm. d. A telescope of 3 cm diameter and focal length of 75 cm. e. Both b and c since they have the same focal length.
A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is _________ times the frequency of the first wave
Fill in the blank(s) with correct word