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 18 of 42
- A. Electric Potential Difference
- B. Electric Field Strength
- C. Magnetic Field Strength
- D. Energy
Explanation: The unit of energy is the joule, the unit of magnetic field strength is Tesla, and the unit of electric field strength is Newton per…
Correct answer: Electric Potential Difference- A. Decreasing the area of the plates & decreasing the separation between the plates
- B. Decreasing the area of the plates & increasing the separation between the plates & inserting a dielectric between the plates
- C. Increasing the area of the plates & decreasing the separation between the plates & inserting a dielectric between the plates
- D. Increasing the area of the plates & increasing the separation between the plates
Explanation: The energy stored by a parallel plate capacitor depends upon the area of the plates, the distance between the plates, and the presence of…
Correct answer: Increasing the area of the plates & decreasing the separation between the plates & inserting a dielectric between the plates- A. Magnetic
- B. Electric
- C. Static
- D. All of these options are correct
- E. Both A and B
Explanation: The correct answer is Electric (Option B). An electric field is created around a charge, and when that charge experiences a force, it is…
Correct answer: Electric- A. 10
- B. 10,000
- C. 1000
- D. 100,000
Explanation: The explanation for this question is given below:
Correct answer: 10- A. It increases
- B. It decreases
- C. It remains same
- D. It depends on the size or shape of the conductors
Explanation: When the charge given to the capacitor becomes double the capacitance of the capacitor remains the same .The capacitance depends only on…
Correct answer: It remains same- A. Atomic Distance
- B. Nuclear Distance
- C. Charged Particle
- D. All of the Distances
Explanation: Correct option is D. Coulomb's law is true for all distances, including atomic distances, nuclear distances, and charged particles.
Correct answer: All of the Distances- A. Series
- B. Parallel
- C. Both of them
- D. None of them
Explanation: Correct option is A.For capacitors in series, the total capacitance can be found by adding the reciprocals of the individual…
Correct answer: Series- A. 4F
- B. 2F
- C. F
- D. F/2
Explanation: Correct option is A.According to Coulomb's law: F1 = k/d2K =F1 × d2F2 =k /(d/2)2F2 =4FAs this is a numerical thus only one option is…
Correct answer: 4F- A. n2
- B. n
- C. n3
- D. 1
Explanation: The question asks for the ratio of the maximum to minimum capacitance for n capacitors.
Correct answer: n2- A. Magnetic field
- B. Both electric and magnetic field
- C. Electric field
- D. None of these
Explanation: Work done per unit of charge is voltage or potential difference.
Correct answer: None of these- A. Farad
- B. Coulomb
- C. None of these
- D. Newton
Explanation: Coulomb (C), farad (F) and newton (N) are the units of electric charge, capacitance and force respectively.
Correct answer: Coulomb- A. Friction
- B. Charge
- C. Current
- D. Resistance
Explanation: Charge is the property of an object that displays electrostatic attraction or repulsion with other objects bearing some charge.
Correct answer: Charge- A. Farad
- B. Volt
- C. Seconds
- D. Ampere
Explanation: The unit of capacitance is farad. Volt, ampere and seconds are units of voltage, current and time respectively.
Correct answer: Farad- A. Electric field intensity
- B. Magnetic field
- C. Magnetic flux
- D. Charge
Explanation: The electric field intensity at any point in the field is defined as the force per unit charge at that point.
Correct answer: Electric field intensity- A. Different across each capacitor
- B. Both of these
- C. Same across all capacitors
- D. None of these
Explanation: In a parallel combination of capacitors, each capacitor receives the full voltage of the battery.
Correct answer: Same across all capacitors- A. All of these
- B. Area of plate
- C. Distance between the plates
- D. Dielectric constant
Explanation: The capacitance of a parallel plate capacitor is directly proportional to the area of one of the plates (A) and the dielectric constant of…
Correct answer: All of these- A. 8.85 x 10^-12 C2 / (N.m2)
- B. 8.85 x 10^-12 (N.m2)/C2
- C. 9.9 x 10^-12 C2 / (N.m2)
- D. 9.9 x 10^12 C2 / (N.m2)
Explanation: The value of permittivity of free space is approximately 8.85 x 10-12 C2 /(N.m2). This is a fact hence, option A is correct.
Correct answer: 8.85 x 10^-12 C2 / (N.m2)- A. Metre per second
- B. Tesla
- C. Ampere
- D. Coulomb
Explanation: An electric charge, positive or negative, is the property of an object that determines how an electric or magnetic field will affect that…
Correct answer: Coulomb- A. Circular
- B. All of these
- C. Curved
- D. Straight
Explanation: The field lines of charged particles are always curved, but are not perfectly circular due to forces of attraction and repulsion.
Correct answer: Curved- A. 4πε(b-a)
- B. 4πε (ab)/(b-a)
- C. 4πεab
- D. 4πε/(b-a)
Explanation: The capacitance of a spherical capacitor is given by the formula 4πε (ab)/(b-a), where:a is the distance from the center to the inner…
Correct answer: 4πε (ab)/(b-a)