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

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

The sum of electric and magnetic force is called.

• A) Newton’s force
• B) Lorentz force
• C) Centripetal force
• D) Maxwell force

Two parallel straight wires carrying current in same direction will:

• A) Repel each other
• B) Attract each other
• C) May repel or attract
• D) No effect

A charged particle oscillates about its mean position with a frequency of 109 Hz. The frequency of electromagnetic waves produced by the oscillator is:

• A) 109 Hz
• B) 106 Hz
• C) 107 Hz
• D) 108 Hz

A battery has an EMF of 10 volts and an internal resistance of 1 Ω. If the battery is connected to a load of 4 Ω, what is the current flowing through the circuit?

• A) 2.5 A
• B) 3 A
• C) 10 A
• D) 2 A

What property of ions determines the extent of deflection in a magnetic field in a mass spectrometer?

• A) Ion charge
• B) Ion energy
• C) Ion size
• D) Ion-mass to charge ratio (m/q)

Which one of the following voltages is obtained from a generator?

• A) DC voltage
• B) AC voltage
• C) Either AC or DC voltage
• D) Neither AC nor DC voltage

If the current through the conductor is doubled while the radius of the circular loop remains constant, what happens to the magnetic field according to Ampère's law?

• A) Magnetic field remains the same.
• B) Magnetic field doubles.
• C) Magnetic field quadruples.
• D) Magnetic field is halved.

What is the electric field direction at a point on the axial line of an electric dipole?

• A) Toward the negative charge
• B) Opposite to the dipole moment direction
• C) Along the line from negative to positive
• D) Toward the positive charge

Which of the following statements is NOT TRUE about electromagnetic waves?

• A) The electromagnetic radiation from a burning candle is un-polarized.
• B) The receptions of electromagnetic waves require an antenna.
• C) Electromagnetic waves satisfy the Maxwell's Equation.
• D) Electromagnetic waves can not travel through space.

A stationary charge placed in a magnetic field will experience:

• A) No force.
• B) A magnetic force.
• C) An electric force.
• D) Both electric and magnetic forces.

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