The lenz’s law refers to:

• A) Potential difference
• B) Motional emf
• C) Induced potential
• D) Induced current

In a magnetic field, which ions experience a greater deflection: heavier ions or lighter ions? (Provided all other parameters are kept same)

• A) Independent of ion-mass
• B) Heavier ions
• C) Lighter ions
• D) Both experience the same deflection

A transparent refracting medium bounded by the two curved surfaces called:

• A) Prism
• B) Mirror
• C) Glass
• D) Lens

1 Tesla is equal to

• A) 10-3 guass
• B) 103 guass
• C) 10-4 guass
• D) 104 guass

Maxwell’s second equation is expressed as __________:

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

If the voltage in a circuit is 10 volts and the resistance is 5 ohms, what is the power consumed?

• A) 10 watts
• B) 2 watts
• C) 20 watts
• D) 50 watts

The waves used by artificial satellites for communication is:

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

One Tesla is equal to

• A) N A m
• B) N /A m
• C) N A/m
• D) N /Am

What is the charge density for a volume charge distribution?

• A) dq = λds
• B) dq = σdV
• C) dq = dA
• D) dq = ρdV

Select the correct statement:

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

The transformer voltage induced in the secondary coil of a transformer is mainly due to:

• A) A varying electric field
• B) A varying magnetic field
• C) The vibrations of the primary coil
• D) The iron core of the transformer

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