What does effect polarization have on the dipole moment in a dielectric material?

• A) Dipole moment remains constant
• B) Dipole moment increases
• C) Dipole moment decreases
• D) Dipole moment becomes zero

Which field(s) are involved in the Lorentz force acting on charged particles in a velocity selector?

• A) Electric and magnetic fields
• B) Gravitational field only
• C) Electric field only
• D) Magnetic field only

Force per unit charge is:

• A) Lorentz force
• B) Electric Flux
• C) Electric potential
• D) Electric field intensity

How does the total current behave when it is divided between two resistors in an electrical circuit?

• A) Becomes zero
• B) Remains constant
• C) Increases
• D) Decreases

Maxwell’s second equation is expressed as __________:

• A) ▽×B = 1
• B) ▽⋅B = 1
• C) ▽×B = 0
• D) ▽⋅B = 0

According to faraday's law, the e.m.f. induced in the coil with N turns and magnetic flux ‘φ’ is:

• A) ɛ = -N2 dφ/dt
• B) ɛ = -N dt2/ d2φ
• C) ɛ = -N d2φ/dt2
• D) ɛ = -N dφ/dt

The waves used by artificial satellites for communication is:

• A) Infrared waves
• B) Radio waves
• C) X-rays
• D) Microwaves

The formula for the energy density (u) in a capacitor, with electric field (E) is:

• A) u = 0.5ε₀E²
• B) u = E/ε₀
• C) u = 0.5E/ε₀
• D) u = ε₀E²

If Io is the peak value of an AC supply, then its rms value is given as Irms:

• A) Io/2
• B) √2 Io
• C) Io/0.707
• D) Io/√2

Select the correct statement:

• A) Blue light has a higher frequency than x rays
• B) Radio waves have higher frequency than gamma rays
• C) Ultraviolet light has a longer wavelength than infrared
• D) Gamma rays have higher frequency than infrared waves

In US the electricity standards are:

• A) 120 Volts and 60 Hertz
• B) 120 Volts and 50 Hertz
• C) 100 Volts and 50 Hertz
• D) 230 Volts and 50 Hertz

Which of the following have the greatest wavelength?

• A) Ultraviolet
• B) Radio waves
• C) Gamma rays
• D) Infrared

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

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

In a vacuum, the conduction current is __________:

• A) Infinity
• B) Undetermined
• C) Zero
• D) Unity

We desire to make an LC circuit that oscillates at 100 Hz using an inductance of 2.5H. We also need a capacitance of:

• A) 1 F
• B) 100μF
• C) 1μF
• D) 1mF

Potentiometer can be used as

• A) Galvanometer
• B) Potential divider
• C) Ammeter
• D) Ohm meter

Inductive reactance XL of an inductor is:

• A) 2πfL
• B) πfL
• C) 4πfL
• D) 2πL

The graphical representation of Ohm’s law is:

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

A transformer is employed to:

• A) Obtain a suitable D.C. voltage.
• B) Convert A.C. into D.C.
• C) Obtain a suitable A.C. voltage.
• D) Convert D.C. into A.C.

In the context of capacitors, how is energy related to the electric field strength?

• A) Energy is directly proportional to the electric field strength
• B) Energy is unrelated to the electric field strength
• C) Energy is inversely proportional to the electric field strength
• D) Energy is proportional to the square of the electric field strength