Free Electrostatics MCQs with Answers
831 Electrostatics MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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Read the Electrostatics notesFree MDCAT chapter notes with key terms831 questions · page 27 of 42
- A. 8uF
- B. 0.75 uF
- C. 1.33 uF
- D. 6μF
- E. 2 μF
Explanation: When capacitors are connected in series, the inverse of the equivalent capacitance is equal to the sum of the inverses of the individual…
Correct answer: 1.33 uF- A. Volt
- B. Ampere
- C. Henry
- D. Tesla
- E. Newton
Explanation: The unit joule per coulomb is equal to: a) Volt. Joule per coulomb is the unit of electric potential difference or voltage.
Correct answer: Volt- A. -32 x 10^-19J
- B. 32 x 10^-19J
- C. -32 x 10^19 J
- D. 32 x 10^19 J
- E. Zero
Explanation: The energy gained by a charged particle when it is moved through a potential difference can be calculated using the equation: Energy =…
Correct answer: 32 x 10^-19J- A. 8.85 x 10^-12 N
- B. 1.602 x 10^-19 N
- C. 1N
- D. 6.67 x 10^-11 N
- E. 9 x 10^9 N
Explanation: Mathematically, Coulomb's Law is expressed as: F = k * (q1 * q2) / r^2, where k is the electrostatic constant, approximately equal to 9 ×…
Correct answer: 9 x 10^9 N- A. U/2
- B. U/4
- C. 4U
- D. 2U
Explanation: The question has stated that a capacitor is connected to a battery (V) and because of battery; energy is stored in a capacitor which is U.
Correct answer: U/4- A. 1200 J
- B. 800 J
- C. 300 J
- D. 0J
Explanation: Given: Energy = ∆E = 600 J Charge = q = 2C Potential difference = V = ? As we known that: V = ∆E / q = 600 / 2 V = 300 J/C
Correct answer: 300 J- A. electrostatic force obeys inverse square law while gravitational force does not
- B. Both gravitational force and electrostatic force are repulsive in nature
- C. gravitational force is much weaker than electrostatic forced.
- D. Both electrostatic force and gravitational force don't obey inverse square law
Explanation: Gravitational force is indeed much weaker compared to electrostatic force.
Correct answer: gravitational force is much weaker than electrostatic forced.- A. nature of medium
- B. system of units
- C. types of charge
- D. nature of medium and system of units
Explanation: Coulomb's constant, denoted by k, is a fundamental constant in electrostatics that determine the strength of the electrostatic force…
Correct answer: nature of medium and system of units- A. acceleration
- B. displacement
- C. rate of change of acceleration
- D. velocity
Explanation: In the case of a charged particle moving in a uniform electric field, the acceleration of the particle will have a constant non-zero…
Correct answer: acceleration- A. U = ½ QV2
- B. U= CV2/2
- C. U = ½ QC
- D. U = Q/2v
Explanation: Energy stored in a capacitor is electrical potential energy, and it is thus related to the charge Q and voltage V on the capacitor.
Correct answer: U= CV2/2- A. 25cm from Q2
- B. 75cm from Q2
- C. 50cm from Q1
- D. 33.3cm from Q1
Explanation: The electric potential is defined as the amount of work energy needed to move a unit of electric charge from a reference point to a…
Correct answer: 25cm from Q2- A. Ohm's law
- B. Faraday's Law
- C. Gauss's law
- D. Ampere's Law
Explanation: Gauss's law allows us to calculate the electric field or electric intensity due to a given charge distribution.
Correct answer: Gauss's law- A. Area of plates
- B. Medium
- C. Distance between plates
- D. Thickness
Explanation: The thickness of the plates does not affect the capacitance. The capacitance depends on the area of the plates, but not on their…
Correct answer: Thickness- A. Zero
- B. Less than that at the surface
- C. Greater than that at the surface
- D. Equal to that at the surface
Explanation: According to Gauss's law, the electric field inside a uniformly charged conducting sphere is zero.
Correct answer: Equal to that at the surface- A. Force, displacement
- B. Force, velocity
- C. Force, acceleration
- D. Force, momentum
Explanation: According to second law of motion when force is applied on a body acceleration is produced in it in the same direction.
Correct answer: Force, acceleration- A. Kinetic
- B. Potential
- C. Thermal
- D. Light
Explanation: A capacitor stores electrical potential energy. When a capacitor is charged, electrical potential energy is stored in the electric field…
Correct answer: Potential537. When the distance between two charged particles is halved the coulomb force between them becomes:
- A. One fourth of the initial force
- B. Four times of the initial force
- C. Double the initial force
- D. One-half of the initial force
Explanation: When the distance between two charges is doubled, then the force among them will become one- fourth time.F= kq¹q² ( 2r)²= kq¹q² 4r²F = 4
Correct answer: Four times of the initial force- A. Insulators
- B. Isolators
- C. Capacitors
- D. Resistors
Explanation: A capacitor consists of two conducting plates separated by an insulator and is used to store electric charge.
Correct answer: Insulators- A. Sphere
- B. Cylinder
- C. Cube
- D. Cuboid
Explanation: For a line of charge the gaussian surface is a cylinder. To find the area of the surface we only count the cylinder itself.
Correct answer: Cylinder- A. Gay-Lussac's Law
- B. Coulomb's Law
- C. Faraday's Law
- D. Charles's Law
- E. Boyle's Law
Explanation: "The electric force between two static point charges varies directly to the product of charges with each charge and inversely with the…
Correct answer: Coulomb's Law