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

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

What is the formula for the energy stored (U) in a capacitor with capacitance (C) and potential difference (V)?

• A) U = CV²
• B) U = 0.5 CV²
• C) U = 0.5 (C / V²)
• D) U = C/V

Electromagnetic waves emitted from antenna are:

• A) Longitudinal
• B) Transverse
• C) Linear
• D) Stationary

What are the SI units of magnetic flux?

• A) Tesla (T)
• B) Ampere (A)
• C) Weber (Wb)
• D) Joules (J)

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

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

If a charged particle moves at an angle of 60 degrees to the magnetic field, what is the angle between the resulting force and the direction of motion?

• A) 30 degrees
• B) 60 degrees
• C) 90 degrees
• D) 0 degrees

In RL series circuit phase angle is given by:

• A) Tan-1 (ωLR)
• B) Tan-1 (ωL/R)
• C) Tan-1( ωR/L)
• D) Tan-1 (R/ωL)

The quantity ΔV/Δr is called:

• A) Electric energy
• B) Potential gradient
• C) Electric potential
• D) Potential barrier

The ratio of the amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagating in vacuum is equal to the:

• A) Speed of light
• B) The square root of reciprocal of speed of light
• C) The square root of Speed of light
• D) The reciprocal of speed of light

Lenz’s law is in accordance with law of conservation of

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

The A.C circuit in which current and voltage are in phase the power factor is

• A) 1
• B) Infinity
• C) 0.5
• D) 0