How much work is required to move a charge from one location on an equipotential to another point on the same equipotential? Explain
What will be an ideal response?
Zero. The electric field is perpendicular to an equipotential, therefore the work done in moving along an equipotential is zero.
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How can a tapered channel (tapchan) work to produce energy? Explain
What will be an ideal response?
Which of the following are characteristics of laser light? (There may be more than one correct choice.)
A) It is coherent. B) It contains a full spectrum of wavelengths. C) It is produced by an inverted population of atoms.
Identical point charges (+20 ?C) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 ?C from infinity to the midpoint of one side of the triangle?
a. 26 J b. 16 J c. 23 J d. 21 J e. 12 J
A 30-N box is pulled upward 6.0 m along the surface of a ramp that rises at 37° above the horizontal. How much work does the gravitational force exerted on the box by Earth do on the box during this process?
A) -1100 J B) -110 J C) -140 J D) -180 J E) 120 J