Electric charges and fields | Chapter -1 | Class 12 physics for CBSE and NCERT

Admin - January 03, 2024

Electric Charges and Fields

Class 12 Physics Chapter-1  Solved MCQ
CBSE & NCERT

Electric charges and fields solved mcq

  1. What is the SI unit of electric charge?
    1. Ampere
    2. Coulomb
    3. Volt
    4. Ohm


  2. Which fundamental particle carries a negative electric charge?
    1. Proton
    2. Neutron
    3. Electron
    4. Positron


  3. What is the formula for electric charge?
    1. Q = m × g
    2. Q = I × t
    3. Q = V × I
    4. Q = n × e


  4. Coulomb's Law describes the force between two charged objects. What does it depend on?
    1. Distance and velocity
    2. Mass and charge
    3. Distance and charge
    4. Velocity and charge


  5. What is the electric field strength at a point in space?
    1. Force per unit mass
    2. Force per unit charge
    3. Charge per unit area
    4. Energy per unit charge


  6. How is electric potential defined?
    1. Work done per unit charge
    2. Charge per unit time
    3. Force per unit charge
    4. Charge per unit area


  7. Which statement about conductors is true?
    1. Easily gain electrons
    2. Do not allow electric charge to flow easily
    3. Allow electric charge to flow easily
    4. Are insulators


  8. What is the direction of the electric field lines between two positive charges?
    1. Inward
    2. Outward
    3. Parallel
    4. Random


  9. What is the electric potential energy stored in a capacitor dependent on?
    1. Voltage and current
    2. Charge and resistance
    3. Capacitance and voltage
    4. Resistance and current


  10. What is the SI unit of electric potential?
    1. Volt
    2. Ohm
    3. Ampere
    4. Joule


  11. Which material is commonly used as an insulator?
    1. Copper
    2. Aluminum
    3. Rubber
    4. Silver


  12. In a parallel plate capacitor, what factor does capacitance depend on?
    1. Plate area and charge
    2. Plate separation and charge
    3. Plate area and plate separation
    4. Charge and voltage


  13. What is the relationship between current, voltage, and resistance in a circuit?
    1. V = IR
    2. I = VR
    3. R = IV
    4. I = RV


  14. What is the purpose of a diode in an electrical circuit?
    1. Amplify signals
    2. Control current flow
    3. Store electrical energy
    4. Measure voltage


  15. Which law states that the total electric flux through a closed surface is equal to the net charge enclosed divided by the permittivity of free space?
    1. Gauss's Law
    2. Faraday's Law
    3. Ampere's Law
    4. Coulomb's Law


  16. What happens to the electric field strength between two charged plates if the distance between them is increased?
    1. Increases
    2. Decreases
    3. Remains constant
    4. Becomes zero


  17. What type of current flows in only one direction?
    1. Direct current
    2. Alternating current
    3. Electric current
    4. Magnetic current


  18. What is the primary purpose of a fuse in an electrical circuit?
    1. Control voltage
    2. Regulate current flow
    3. Protect against overcurrent
    4. Increase resistance


  19. Which of the following materials exhibits the highest conductivity?
    1. Glass
    2. Wood
    3. Copper
    4. Plastic


  20. What is the magnitude of the charge on a single electron?
    1. 1.6 × 10^-19 C
    2. 3.0 × 10^8 C
    3. 9.8 C
    4. 2.0 C

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