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

Electromagnetic waves do not transport:

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

Electric field inside a conductor is

• A) Maximum
• B) q / εo
• C) Infinite
• D) Zero

What is a Gaussian surface in the context of Gauss's Law?

• A) A surface with constant electric field
• B) A surface with nonzero electric flux
• C) Any closed surface in space
• D) An imaginary surface used to apply Gauss's Law

Along the axial line of an electric dipole, how does the electric field vary with distance "r" from the center of the dipole?

• A) E ∝ r
• B) E ∝ 1/r²
• C) E ∝ 1/r³
• D) E ∝ 1/r

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

• A) Voltage across R1​ is much greater
• B) Voltage across R2​ is much greater
• C) Voltage across both resistors is the same
• D) Voltages can not be determined

Which of the following is equivalent to one coulomb?

• A) one volt per ampere
• B) One volt second
• C) One volt ampere
• D) One ampere second

A particle carrying a charge of 2e falls through potential difference of 3V. the energy acquired by it will be:

• A) 3 eV
• B) 1.5 eV
• C) 6 eV
• D) 0.66 eV

Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum?

• A) All of these travel at the same speed
• B) Radio waves
• C) Gamma rays
• D) X rays

A step-down transformer is used to:

• A) increase the voltage
• B) decrease the voltage
• C) decrease the power
• D) increase the power

Kirchhoff’s first rule is the manifestation of the law of conservation of:

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

As per Coulomb's law, the force of attraction or repulsion between two point charges directly proportional to the

• A) square of the distance between them
• B) sum of the magnitude of charges
• C) product of the magnitude of charges
• D) cube of the distance