The wavelength of red light is 700 nm. Its frequency is ______.

• A) 4.29 * 10^15 Hertz
• B) 4.29 * 10^14 Hertz
• C) 4.29 * 10^13 Hertz
• D) 4.29 * 10^12 Hertz

In a series 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

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

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

Electromagnetic waves emitted from antenna are:

• A) Linear
• B) Transverse
• C) Longitudinal
• D) Stationary

In a dielectric material, what causes the separation of negative and positive charges on each molecule?

• A) Conduction
• B) Ionization
• C) Polarization
• D) Dissipation

If the cross-sectional area A of a conductor is increased while keeping the current I constant, what happens to the current density J?

• A) J remains unchanged.
• B) J increases
• C) J becomes negative.
• D) J decreases.

When a charge is projected perpendicular to a uniform magnetic field, its path is:

• A) Helix
• B) Circular
• C) Ellipse
• D) Spiral

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

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

If F is the force acting on the test charge qo, the electric field intensity E would be given by

• A) E = qo/F
• B) E = F - qo
• C) E = F/qo
• D) E = F + qo

Capacitive reactance Xc is:

• A) 1/2πfC
• B) 4πfC
• C) 1/4πfC
• D) 2πfC

What does Gauss's law for magnetism state regarding the net magnetic flux through a closed surface?

• A) The net magnetic flux is zero.
• B) The net magnetic flux depends on the size of the closed surface.
• C) The net magnetic flux is always positive.
• D) The net magnetic flux is always negative.

Which of the following is equivalent to one coulomb?

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

Which of the following is usually taken to make the core of a transformer?

• A) Aluminum
• B) Hard iron
• C) Copper
• D) Soft iron

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

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

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

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

What principle governs the conversion of magnetic variations into an electric current in magnetic recording tapes?

• A) Ampere's Law
• B) Coulomb's Law
• C) Faraday's Law
• D) Ohm's Law

Which of the following is equivalent to 1 V?

• A) 1 J/W
• B) 1 J/s
• C) 1 J/C
• D) 1 J/A

The graphical representation of Ohm’s law is:

• A) Parabola
• B) Hyperbola
• C) Ellipse
• D) Straight line

Under what condition is induced electromotive force (EMF) produced in a conductor?

• A) When there is a constant magnetic field
• B) When there is a strong magnetic field
• C) When there is a strong electric field
• D) When there is a time-varying magnetic field

Phase difference between V and I of an A.C through resistor is:

• A) 270 degree
• B) 180 degree
• C) 0 degree
• D) 90 degree