A particle having 2e charge falls through a potential difference of 5 V. energy acquired by it is

• A) 0.4 eV
• B) 10 eV
• C) 20 eV
• D) 2.5 eV

The known laws of electromagnetism before James Clerk Maxwell were following, EXCEPT:

• A) Gauss's Laws
• B) De Broglie Law
• C) Faraday's Law
• D) Ampere's Law

Which of the following is NOT the characteristic of electromagnetic waves?

• A) They have both fields, electric field and magnetic fields
• B) They can travel with different speeds in vacuum depending on frequency
• C) There is no limit to the amplitude or frequency
• D) They can travel through vacuum

Electric flux is maximum when surface is held __________ to field lines.

• A) 45o
• B) Perpendicular
• C) 0o
• D) Parallel

Electromagnetic waves are transverse in nature, as evident by the phenomenon of ______.

• A) Interference
• B) Polarization
• C) Reflection
• D) Diffraction

In an electric field E, if a charge Q is present, the force F acting on it is given by:

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

How is the potential difference related to the electric field in a capacitor?

• A) Inversely proportional
• B) Unrelated
• C) Directly proportional
• D) Exponential relationship

Maximum power delivered by a battery is:

• A) E2/4r
• B) VIT
• C) Unlimited
• D) 4rE2

When we accelerate the charge, which types of waves are produced?

• A) Electromagnetic waves
• B) Stationary waves
• C) Travelling waves
• D) Mechanical waves

Average value of current and voltage over complete cycle is:

• A) Negative
• B) Zero
• C) Infinite
• D) Positive

Charge carriers in electrolysis are:

• A) Electrons
• B) Protons
• C) Holes
• D) Positive and negative ions

Which of the following statements is false about the properties of electromagnetic waves?

• A) The energy of the electromagnetic wave is divided equally between electric and magnetic fields.
• B) Both electric and magnetic field vectors attain their maximum and minimum at the same place and at the same time.
• C) These waves do not require any material medium for propagation.
• D) Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave.

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

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

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

How does the radius of the ion's path in the magnetic field change as the mass of the ion increases? (Provided all other parameters are kept constant).

• A) The radius increases.
• B) The radius remains constant.
• C) The change in mass does not affect the radius.
• D) The radius decreases.

What fundamental principle does Kirchhoff's Current Law (KCL) rely on?

• A) Conservation of power
• B) Conservation of charge
• C) Conservation of momentum
• D) Conservation of energy

Electric field due to oppositely charged parallel plate capacitor is

• A) σ/εo
• B) σ/2εo
• C) ϕ/εo
• D) ϕ/2εo

Energy density in case of a capacitor is always proportional to:

• A) CV
• B) E 2
• C) V 2
• D) C 2

The relation between electric filed due to infinite sheet of charge (Es) to oppositely charged parallel plate capacitor of infinite length (Ec) is

• A) Es = 4Ep
• B) Ec = 2Es
• C) Es = Ep
• D) Es = 2Ep

What is the primary principle behind a velocity selector in the context of the Lorentz force?

• A) Maximizing the magnetic force
• B) Eliminating the Lorentz force
• C) Minimizing the electric field
• D) Balancing electric and magnetic forces