ICSE Class 12 Physics by Pavan | Practice Test to Test Your Knowledge
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ICSE Class 12 Physics

ICSE Class 12 Physics

Comprehensive mock test covering Waves, Electricity, Magnetism, Modern Physics, and Optics. Features numerical problems, theory questions, and practical applications based on the latest ICSE syllabus.

2025-07-19
Pavan Pavan
ICSE Class 12 Physics Grade 12

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

What is the unit of electric charge in the SI system?

A
Coulomb (C)
B
Ampere (A)
C
Volt (V)
D
Newton (N)

According to Coulomb’s Law, the force between two point charges is directly proportional to which of the following?

A
The product of the magnitudes of the charges
B
The distance between the charges
C
The sum of the charges
D
The inverse square of the charges

The electric field at a point is defined as the force experienced by a unit positive charge placed at that point. What is the unit of electric field?

A
N/C (Newton per Coulomb)
B
V/m (Volt per meter)
C
C/N (Coulomb per Newton)
D
N·m/C (Newton meter per Coulomb)

What is the direction of the electric field at a point near a positive point charge?

A
Away from the charge
B
Towards the charge
C
Perpendicular to the line joining the charges
D
In a circular direction around the charge

Which of the following statements is true for electric dipoles?

A
An electric dipole has equal and opposite charges separated by a small distance
B
An electric dipole consists of two positive charges separated by a distance
C
An electric dipole has charges of unequal magnitude separated by a distance
D
An electric dipole has a single positive charge

What is the torque experienced by an electric dipole in a uniform electric field?

A
τ = pE sinθ
B
τ = pE cosθ
C
τ = pE
D
τ = E/p

What is electric flux?

A
The product of electric field and the area perpendicular to the field
B
The amount of charge flowing through a conductor
C
The total potential difference in a circuit
D
The ratio of the total charge to the area

Gauss's law in electrostatics states that the electric flux through a closed surface is proportional to what?

A
The total charge enclosed within the surface
B
The electric field at the surface
C
The electric potential at the surface
D
The charge density on the surface

The electric field due to a uniformly charged infinite plane sheet is:

A
Constant and does not depend on the distance from the sheet
B
Increases with distance from the sheet
C
Decreases with distance from the sheet
D
Depends on the area of the sheet

What is the electric field at a point outside a uniformly charged spherical shell?

A
The same as if the entire charge were concentrated at the center
B
Zero
C
It increases with distance from the shell
D
It decreases exponentially with distance

What is the potential difference between two points in an electric field?

A
The work done in moving a unit charge from one point to the other
B
The total charge at both points
C
The distance between the points
D
The product of charge and electric field

What is the electric potential due to a point charge?

A
V = kQ/r
B
V = kQ/r²
C
V = Q/r
D
V = Q/r³

What is the electric potential energy of two point charges?

A
U = kQ₁Q₂/r
B
U = kQ₁Q₂/r²
C
U = Q₁Q₂/r
D
U = Q₁Q₂/r³

In a parallel plate capacitor, the capacitance is determined by which factors?

A
The area of the plates, the distance between the plates, and the dielectric constant
B
The area of the plates and the charge on the plates
C
The voltage across the plates and the dielectric material
D
The number of plates and the area

What is the energy stored in a capacitor?

A
U = 1/2 CV²
B
U = CV
C
U = C²V
D
U = V²/2C

What happens when capacitors are connected in series?

A
The total capacitance decreases
B
The total capacitance increases
C
The total capacitance remains unchanged
D
Capacitance is divided equally among the capacitors

What is the effect of introducing a dielectric material between the plates of a capacitor?

A
It increases the capacitance
B
It decreases the capacitance
C
It has no effect on the capacitance
D
It increases the electric field between the plates

What happens to the electric field in a capacitor when the distance between the plates is increased?

A
The electric field decreases
B
The electric field increases
C
The electric field remains unchanged
D
The electric field becomes zero

The capacitance of a parallel plate capacitor depends on which of the following?

A
The area of the plates, the distance between the plates, and the dielectric constant
B
The potential difference across the plates
C
The charge on the plates
D
The type of wire used

In which condition is the capacitance of a capacitor maximum?

A
When the dielectric constant is high
B
When the plates are far apart
C
When the dielectric material is removed
D
When the capacitor is not connected to any circuit

What does the dielectric constant of a material represent?

A
The ability of the material to increase the capacitance
B
The resistance of the material to electric current
C
The ability of the material to conduct electricity
D
The dielectric breakdown of the material

The energy stored in a capacitor can be calculated by which formula?

A
U = 1/2 CV²
B
U = C²V
C
U = CV
D
U = V²/C

What does the term 'capacitance' of a capacitor refer to?

A
The ability of the capacitor to store charge
B
The resistance of the capacitor
C
The amount of electric field generated
D
The potential difference between the plates

What happens to the potential difference across a capacitor when it is charged?

A
It increases
B
It decreases
C
It remains the same
D
It becomes zero

What is the unit of capacitance?

A
Farad (F)
B
Volt (V)
C
Ampere (A)
D
Newton (N)

The energy stored in a parallel plate capacitor is directly proportional to which of the following?

A
Capacitance and the square of the voltage
B
Capacitance and voltage
C
Voltage and the distance between the plates
D
Voltage and the area of the plates

Which of the following factors affect the capacitance of a parallel plate capacitor?

A
Area of the plates, distance between the plates, and the dielectric constant
B
Charge on the plates and the voltage
C
Length of the capacitor and current
D
Magnetic field and dielectric constant

When capacitors are connected in parallel, the total capacitance is:

A
The sum of the individual capacitances
B
The product of the individual capacitances
C
The average of the individual capacitances
D
Inversely proportional to the sum of the individual capacitances

What is the relation between charge, capacitance, and potential difference?

A
Q = C × V
B
Q = V × C²
C
Q = V²/C
D
Q = C/V

What is the effect of increasing the dielectric constant on the capacitance of a capacitor?

A
It increases the capacitance
B
It decreases the capacitance
C
It has no effect on the capacitance
D
It makes the capacitance negative