In an electrical circuit with constant resistance, if the voltage source is doubled, what happens to the power delivered to the circuit?

• A) The power is quadrupled.
• B) The power is halved.
• C) The power is doubled.
• D) The power remains the same.

Kirchhoff’s 2nd rule is the manifestation of the law of conservation of:

• A) Mass
• B) Charge
• C) Energy
• D) Momentum

What is the relationship between the electric field and charges on a perfect electric conductor's surface?

• A) Electric field is always zero
• B) Electric field is discontinuous and inversely proportional to charge density
• C) Electric field is proportional to charge density
• D) Electric field is normal to the surface and proportional to charge density

In a parallel circuit with resistors R1​ and R2​, if R1​ is much greater than R2​, what is the approximate total resistance (RT)?

• A) RT​ ≈ R1​ · R2​
• B) RT​ ≈ R2​
• C) RT ≈ R1​ + R2​
• D) RT​ ≈ R1​

When are eddy currents typically induced in a conductor?

• A) In the presence of a constant magnetic field
• B) When there is no magnetic field
• C) When exposed to a changing magnetic field
• D) In the presence of a strong magnetic field

In a parallel circuit with resistors R1​ and R2​, if R1​ is much greater than R2​, how does the current flowing through R2​ compare to the current flowing through R1​?

• A) Currents are equal
• B) Currents cannot be compared
• C) Current through R1​ is much greater
• D) Current through R2​ is much greater

Which physical quantity is produced by a calculation where a charge is multiplied by a potential difference (p.d)?

• A) Energy
• B) e.m.f
• C) Current
• D) Power

Which statement about equipotential surfaces is correct?

• A) They have varying electric potential
• B) They are surfaces with constant electric field
• C) All points on them have the same electric potential
• D) They are always spherical

What is the unit of electric potential?

• A) Newton/Meter
• B) Joule/Coulomb
• C) Joule/Meter
• D) Volt/Coulomb

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