When a dielectric material is introduced between the plates of a capacitor, what does effect it have on the capacitance?

• A) Decreases
• B) Depends on the dielectric constant
• C) Remains the same
• D) Increases

What is the expression for electric potential due to an electric dipole at a point on the axis at distance r?

• A) 𝑽 = 𝒒d/(4𝝅ε₀r²)
• B) 𝑽 = 𝒒/(4𝝅ε₀r²)
• C) 𝑽 = 𝒒/(4𝝅ε₀r)
• D) 𝑽 = 𝒒d/(4𝝅ε₀r)

How does the electric potential V due to an electric dipole behave along its equatorial line at a distance "r"?

• A) 𝑉 ∝ 1/r
• B) 𝑉 is constant
• C) 𝑉 ∝ r
• D) 𝑉 = 0

If two capacitors, each with a capacitance of 100 microfarads, are connected in parallel, what is the total capacitance?

• A) 50 microfarads
• B) 150 microfarads
• C) 100 microfarads
• D) 200 microfarads

Which of the following is not a conservative force?

• A) Drag force
• B) Gravitational force
• C) Electric force
• D) None of these

A charge of 30 C flows through an electric appliance in 2.0 minutes. What is the average current in the appliance?

• A) 0.25 A
• B) 4.0 A
• C) 60 A
• D) 15 A

Which one of is in the order of decreasing frequency?

• A) Infrared rays, visible light, x – rays
• B) X – rays, radio waves, infrared rays
• C) Yellow, green, red
• D) Ultraviolet rays, visible light, radio waves

What is an equipotential surface?

• A) A surface with no electric field
• B) A surface with constant electric field
• C) A surface where all points have the same electric potential
• D) A surface with varying electric potential

Tesla is a unit of

• A) Flux density
• B) Magnetic flux
• C) Mutual inductance
• D) Self-inductance

When the angle θ is 60°, how does the magnetic flux compare to its maximum value?

• A) Magnetic flux is zero.
• B) Magnetic flux is half of the maximum.
• C) Magnetic flux is maximized.
• D) Magnetic flux is unchanged.

The concept of an electric field lines is introduced by:

• A) Faraday
• B) Joseph Henry
• C) Coulomb
• D) Einstein

Electric flux is maximum when surface area vector is _______ to field lines.

• A) Parallel
• B) Antiparallel
• C) 45o
• D) Perpendicular

What is the charge density for a volume charge distribution?

• A) dq = ρdV
• B) dq = σdV
• C) dq = dA
• D) dq = λds

What are the units of current density in the International System of Units (SI)?

• A) Amperes per meter (A/m)
• B) Amperes (A)
• C) Amperes per meter squared (A/m2)
• D) Amperes per meter cubed (A/m3)

Typical values for the magnitude of the electric field inside the wire:

• A) 10-5 N/C
• B) 10 -2 N/C
• C) 10-4N/C
• D) 10 -3N/C

If the magnetic field lines are parallel to the surface, what is the value of the magnetic flux?

• A) Magnetic flux is zero.
• B) Magnetic flux is constant.
• C) Magnetic flux is maximized.
• D) Magnetic flux is negative.

What happens to the total capacitance when capacitors are connected in series?

• A) It becomes infinite
• B) It increases
• C) It remains the same
• D) It decreases

In a transformer, the number of turns in the primary and secondary coil is 40 and 120, respectively. If the current in the primary coil is 6 A, the current in the secondary coil is:

• A) 0.2 A
• B) 2 A
• C) 1.8 A
• D) 18 A

What does the electric potential due to a dipole depend on?

• A) Angle between the dipole moment and the field point
• B) Distance from the center of the dipole
• C) Magnitude of charges in the dipole
• D) Both distance and angle

A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is:

• A) 1000V
• B) 100V
• C) 250V
• D) 500V