Which of the following units is used to measure Electromotive Force?

• A) Joule
• B) Ampere
• C) Newton
• D) Volt

The amplitude modulation frequency ranges from:

• A) 540 kHz to 1600 kHz
• B) 520 kHz to 1600 kHz
• C) 540 kHz to 1000 kHz
• D) 540 kHz to 1400 kHz

Why does Lenz's Law dictate that the induced current opposes the change in magnetic flux?

• A) To maximize magnetic flux
• B) To amplify the induced EMF
• C) To conserve energy
• D) To increase energy consumption

Transformers are used in:

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

For a point charge, the electric field lines are always ____________ to equipotential surfaces.

• A) Randomly oriented
• B) Parallel
• C) Perpendicular
• D) Tangential

An LC series circuit with an inductance L and a capacitance C has an oscillation frequency f. Two inductors, each with inductance L, and two capacitors, each with capacitance C, are all wired in series and the circuit is completed. The oscillation frequency is:

• A) f/2
• B) 2f
• C) f/4
• D) f

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

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

Under what condition does Ohm's Law hold true?

• A) When the temperature is constant
• B) When the voltage is fluctuating
• C) When the circuit is open
• D) When the resistance is not constant

The increase in capacitance of a capacitor due to presence of dielectric is due to:

• A) Electrolysis
• B) Electric polarization
• C) Electrification
• D) Ionization

The electric potential at the center of a dipole is

• A) Maximum
• B) Twice of field of point charge
• C) Same as field of point charge
• D) Zero

The value of k in coulomb's law depends upon

• A) distance between charges
• B) magnitude of charges
• C) all of these
• D) medium between two charges

The combined effect of resistance and reactance is known as:

• A) Resistance
• B) Conductance
• C) Impedance
• D) Inductance

Capacitive reactance Xc is:

• A) 2πfC
• B) 1/2πfC
• C) 4πfC
• D) 1/4πfC

If electric and gravitational force on an electron in a uniform electric field balance each other, then the intensity of electric field will be:

• A) qg/m
• B) mg/q
• C) q/mg
• D) m/qg

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​ ≈ R1
• C) RT​ ≈ R1​ · R2
• D) RT​ ≈ R2

The electric mains supply in our homes and offices is a voltage that varies like a sine function with time. Such a voltage is called ___ and the current driven by it in a circuit is called ____.

• A) AC voltage, DC current
• B) AC voltage, DC voltage
• C) AC voltage, AC current
• D) DC voltage, AC current

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

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

An alternating current 'I0sinωt' produces heat in a given resistance at a given time, which is nearly equal to:

• A) 1/√I0
• B) 0.707 I0
• C) 0.707 / I0
• D) √I0

In case of metallic conductors, the charge carriers are:

• A) Electrons and neutrons
• B) Electrons
• C) Protons and neutrons
• D) Neutrons

Which of the following is equivalent to 1 V?

• A) 1 J/W
• B) 1 J/s
• C) 1 J/A
• D) 1 J/C