Chapter 16: Electrostatics Pop Queez

There is a repulsive force between two charged particles when..

• charges are of unlike (opposite) sign

• charges are of like (same) sign

• they have the same proton number

• they have the same electron number

Two positive point charges are placed 10cm apart. What values of both point charges that will produce the maximum Coulomb force?

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Which of the following statements about Coulomb force is TRUE?

i. Force is directly proportional to the products of the charges

ii. Attractive force if both charges have the different sign

iii. Force is inversely proportional to the square of the distance between two charges.

iv. Force is directly proportional to the square of the distance between two charges

• i and ii only

• ii and iii only

• i,ii, and iii

• i,ii, and iv

The positions of two particles X and Y of charges -q and -2q respectively are fixed. Which of the following figures BEST shows the direction and magnitude of forces on the particles.

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Figure below shows various equipotential lines in the form of concentric circle with centre O. Which directions A, B, C, or D is the direction of the electric field at point P

• A

• B

• C

• D

Every charged particles produced..

• an electric field

• a magnetic field

• a negative charge

• a positive charge

Which of the following graphs below BEST represents the strength of the electric field of a point charge a function of the distance, r away from it.

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Where is the direction of the electric field at the midpoint location between the charges +Q₁ and -Q₂?

• Not possible to determine its direction since the values of the charges not given

• Undetermined since the resultant electric field is zero

• Directed towards +Q₁

• Directed towards -Q₂