Welcome to the Quiz!
This quiz contains 26 questions from a mix of 1 subtopics.
What is the force between two point charges called?
gravitational force
magnetic force
electrostatic force
nuclear force
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Which of the following statements about electric charges is true?
like charges have no effect on each other
opposite charges repel each other
like charges attract each other
opposite charges attract each other
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How do electric field lines behave around a positive charge?
they point towards the charge
they circle around the charge
they do not exist around the charge
they point away from the charge
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Which of the following factors does the electrostatic force between two point charges depend on?
the magnitude of the charges
all of the above
the distance between the charges
the sign of the charges (positive or negative)
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How does the electrostatic force between two point charges change when the distance between them is doubled?
the force decreases by a factor of 4
the force increases by a factor of 4
the force increases by a factor of 2
the force decreases by a factor of 2
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What is the relationship between the electrostatic force and the distance between two point charges?
directly proportional
exponential
inversely proportional
inverse square
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What is the direction of the electric field around a negative charge?
away from the charge
parallel to the charge
perpendicular to the charge
towards the charge
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What is the electrostatic force between two point charges of +1 nC and -1 nC placed 1 m apart?
9 × 10⁻⁹ N
-9 × 10⁻⁹ N
-9 × 10⁻¹² N
9 × 10⁻¹² N
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If the magnitude of one of the charges in Coulomb's law is doubled, how does the electrostatic force change?
the force quadruples
the force doubles
the force is halved
the force remains the same
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Explain the concept of electric field lines and how they represent the electric field around a charged object.
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Describe the relationship between the electrostatic force and the distance between two point charges, as stated by Coulomb's law.
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How does electric field strength vary with distance from a point charge?
directly proportional to the square of the distance
inversely proportional to distance
directly proportional to distance
inversely proportional to the square of the distance
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In the formula E = V / d for uniform electric fields, what does d represent?
charge
electric field strength
potential difference
separation between the plates
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Which of the following is true about electric field strength?
it is always uniform in an electric field
it indicates both magnitude and direction
it is a scalar quantity
it points in the direction a negative charge would move
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Calculate the electric field strength 0.1 m from a -2 nC charge.
-4,506 N C-1
-1,798 N C-1
-1,724 N C-1
-2,605 N C-1
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Calculate the electric field strength 0.4 m from a +3 nC charge.
N C-1
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The electric field strength at a distance r from a +4nC charge is 8.99 N C-1. Calculate the distance r.
m
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Two point charges are placed 2.4 m apart. One of the charges is +1 nC and the other is +2 nC. Calculate the electric field strength at the midpoint between the two point charges.
N C-1
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Two point charges are placed 3 m apart. One charge is -1.5 nC and the other is +2nC. Calculate the electric field strength at the midpoint between the two charges.
N C-1
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What is the electric field strength at a distance of infinity from a point charge of 2 nC?
N C-1
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Two point charges, +5 nC and -3 nC, are placed 1 m apart. Calculate the electrostatic force between them.
1.35 x 10-7 N
1.06 x 10-5 N
5.30 x 10-7 N
2.12 x 10-6 N
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What is the electrostatic force between a charge of +2 nC and another of +5 nC, if they are separated by a distance of 2 m?
2.25 x 10-8 N
2.66 x 10-8 N
1.33 x 10-8 N
5.32 x 10-7 N
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Two identical charges of +3 nC each are 0.5 m apart. What is the electrostatic force between them?
1.29 x 10-6 N
2.58 x 10-6 N
6.48 x 10-7 N
3.24 x 10-7 N
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Calculate the electric field strength at a point 0.5 meters away from a point charge of 6×10−6 C in a vacuum.
1.08×105N C−1
4.32×108N C−1
1.08×108N C−1
2.16×105N C−1
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What is the electric field strength 2 meters away from a point charge of 2×10−6 C in a vacuum?
1 x 107 N C-1
4,505 N C-1
6,050 N C-1
4,496 N C-1
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A charge of 5×10−6 C creates an electric field. What is the field strength at a distance of 1 m?
4.3×104 N C2
4.5×104 N C−1
9×104 N C2
9×104 N C−1
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