In a parallel circuit with capacitors C1​ and C2​, if C1​ is much larger than C2​, what is the approximate total capacitance (CT​)?

• A) CT ≈ C1 ​⋅ C2
• B) CT ​≈ C1 ​/ C2
• C) CT​ ≈ C1
• D) CT​ ≈ C2

Transformers are used in:

• A) DC circuit only
• B) Both DC and AC circuits
• C) Neither in DC nor in AC circuits
• D) AC circuits only

When some dielectric is inserted between the plates of a capacitor, then capacitance:

• A) Zero
• B) Increased
• C) Infinity
• D) Decreased

Kirchhoff’s 2nd rule is the manifestation of the law of conservation of:

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

Force on a charged particle is zero when projected at angle with the magnetic field:

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

Electromagnetic waves were experimentally discovered by:

• A) Maxwells
• B) Einstein
• C) Ampere
• D) Hertz

Which electromagnetic radiation transmits the highest photon energy?

• A) Gamma rays
• B) Infrared rays
• C) Microwaves
• D) Ultraviolet radiations

Average value of current and voltage over complete cycle is:

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

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) 10 A
• C) 2 A
• D) 3 A

If the electric and magnetic forces on a charged particle are not balanced in a velocity selector, what will happen to the particle?

• A) It will be deflected.
• B) It will move in a straight line.
• C) It will stop moving.
• D) It will be accelerated.

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

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

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

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

As an object approaches the speed of light, the γ:

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

The process for which entropy remains constant is:

• A) Isobaric process
• B) Isothermal process
• C) An irreversible process
• D) A reversible process

In a rainy day, small oil films on water show brilliant colors. This is due to the phenomenon of:

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

In Newton’s rings the central spot is __________.

• A) Alternate between bright and dark
• B) Can be bright or dark
• C) Always bright
• D) Always dark

When two gases separate by a diathermal wall are in thermal equilibrium with each other:

• A) Only their volumes must be the same
• B) Only their temperatures must be the same
• C) Only their pressures must be the same
• D) They must have the same number of particles

A laser in a compact disc player generates light that has a wavelength of 780 nm in air. The light then enters into the plastic of a CD. If the index of refraction of plastic is 1.55, the speed of this light once enter the plastic is ________.

• A) 3.00 x10^8 m/s
• B) 4.29 x 10^8 km/h
• C) 1.94 x 10^8 m/s
• D) 3.00 x 10^8 km/h

If a laser emits 5×1018 photons per second, and each photon has an energy of 4×10−19 J, determine the total energy emitted per second by the laser.

• A) 10 J/s
• B) 5 J/s
• C) 2.5 J/s
• D) 2 J/s

The primary purpose of the equation of state in thermodynamics is:

• A) To determine the path variables
• B) To explain the conservation of energy
• C) To define the system's internal energy
• D) To relate thermodynamic variables like P, V, and T