Three devices that use electromagnetic induction in their operation are generators, transformers, and dynamic microphones
Indicate whether the statement is true or false
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The magnet moving past an object will produce eddy currents in the object if the object:
a. is magnetic material only. b. is a conductor. c. is an insulator. d. is a liquid.
A parallel plate capacitor is connected to a battery and charged to voltage V. Leah says that the charge on the plates will decrease if the distance between the plates is increased while they are still connected to the battery. Gertie says that the charge will remain the same. Which one, if either, is correct, and why?
a. Gertie, because the maximum voltage is determined by the battery. b. Gertie, because the capacitance of the capacitor does not change. c. Leah, because the capacitance decreases when the plate separation is increased. d. Leah, because the capacitance increases when the plate separation is increased. e. Neither, because the charge increases when the plate separation is increased.
Standing Waves on a String: Standing waves of frequency 17 Hz are produced on a string that has a mass per unit length of 0.0160 kg/m. To what tension must the string be stretched between two supports if adjacent nodes in the standing wave are to be 0.87 m apart?
Fill in the blank(s) with the appropriate word(s).
Consider an experiment where we send monochromatic light to a distant screen through a single narrow slit. The distance between adjacent dark fringes in the diffraction pattern displayed on the screen (A) increases, (B) decreases, or (C) remains the same if, The width of the slit increases
A. Increases B. Decreases C. Remains the same