Circle the True answer choice or choices. a. Equipotential lines and electric fi

Question

Circle the True answer choice or choices. a. Equipotential lines and electric field lines intersect to form right angles. b. A mass weighs 100 N at the surface of the earth. If the same mass were placed at the bottom of a hole that is 3000 meters deep into the earth, the weight would be less than it is at the surface of the earth. c. The superposition principle is only useful when there are at least 100 point charges superimposed on an electric dipole that is infinitely large. d. Electric field lines sometimes intersect to form 90 degree angles. e. If an excess of electric charge is put at the very center of a solid metal block, exactly 3/5 of the excess charge will remain inside the block and the remaining 2/5 of the charge will reside on the outer surface of the block.

Explanation / Answer

a)True

Equipotential lines and electric field lines are normal to each other.

b)True

Weight is a force or weight = mass*gravity

As you above the surface or under the surface towards center of earth gravity decreases. Hence weight will be less as compare to weight on the surface.

c)False

Superposition principle applies for multiple charges. It may be two or infinite.

d) False

Electric fields lines are always parallel to each other.

e)False

All excess electric charge resides on the outer surface of block.

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