Electric Charges and Fields
Class 12 Physics Chapter1 Solved MCQ
CBSE & NCERT

What is the SI unit of electric charge?
 Ampere
 Volt
 Ohm

Which fundamental particle carries a negative electric charge?
 Proton
 Neutron
 Positron

What is the formula for electric charge?
 Q = m × g
 Q = I × t
 Q = V × I

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

What is the electric field strength at a point in space?
 Force per unit mass
 Charge per unit area
 Energy per unit charge

How is electric potential defined?
 Charge per unit time
 Force per unit charge
 Charge per unit area

Which statement about conductors is true?
 Easily gain electrons
 Do not allow electric charge to flow easily
 Are insulators

What is the direction of the electric field lines between two positive charges?
 Inward
 Parallel
 Random

What is the electric potential energy stored in a capacitor dependent on?
 Voltage and current
 Charge and resistance
 Resistance and current

What is the SI unit of electric potential?
 Ohm
 Ampere
 Joule

Which material is commonly used as an insulator?
 Copper
 Aluminum
 Silver

In a parallel plate capacitor, what factor does capacitance depend on?
 Plate area and charge
 Plate separation and charge
 Charge and voltage

What is the relationship between current, voltage, and resistance in a circuit?
 I = VR
 R = IV
 I = RV

What is the purpose of a diode in an electrical circuit?
 Amplify signals
 Store electrical energy
 Measure voltage

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?
 Faraday's Law
 Ampere's Law
 Coulomb's Law

What happens to the electric field strength between two charged plates if the distance between them is increased?
 Increases
 Remains constant
 Becomes zero

What type of current flows in only one direction?
 Alternating current
 Electric current
 Magnetic current

What is the primary purpose of a fuse in an electrical circuit?
 Control voltage
 Regulate current flow
 Increase resistance

Which of the following materials exhibits the highest conductivity?
 Glass
 Wood
 Plastic

What is the magnitude of the charge on a single electron?
 3.0 × 10^8 C
 9.8 C
 2.0 C