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Electromagnetic-theory Questions Set 68:

Quiz Mode

Find the loss tangent if the complex permittivity is given as 10 - j5.

0.5

-2

-0.5

Solution:

A wave has a reflection coefficient of 0.82. Find the transmission coefficient of the wave.

1.22

1.64

0.41

0.18

Solution:

Given the S matrix, determine if the network is lossless.

Lossy

Lossless

Cannot be determined

Depends on other properties

Solution:

Which of the following is not a type of Transmission Line Configuration?

Co-axial Cable

Parallel wire Transmission Line

Microstrip Line

Helical Antenna

Solution:

Two charges of equal magnitudes and at a distance R exert a force F on each other. If the charges are halved and the distance between them is doubled, then the new force acting on a charge is:

F/8

F/4

F/16

Solution:

A solenoid that is 1.5 m long and 0.4 cm in diameter has 10 turns per cm of length. If a current of 5 A flows through the solenoid, the magnetic field inside the solenoid is:

4π × 10⁻³ T

2π × 10⁻³ T

2π × 10⁻⁵ T

4π × 10⁻² T

Solution:

In an AC series circuit, the instantaneous current is maximum when the instantaneous voltage is maximum. The circuit element that will have this behavior is a:

Pure inductor

Pure capacitor

Pure resistor

Combination of a capacitor and an inductor

Solution:

At the charge-free boundary between two dielectric media, which of the following is true?

The electric field is 0

The tangential electric field component is continuous

The normal magnetic flux density is discontinuous

Only the tangential electric field vanishes

Solution:

In a directional coupler, which of the following statements is correct?

Isolation (dB) equals coupling plus directivity

Coupling (dB) equals isolation plus directivity

Directivity (dB) equals isolation plus coupling

Isolation (dB) equals (coupling) (directivity)

Solution:

Choose the correct statement about the behavior of inductors and capacitors in a d.c. circuit:

The capacitor can conduct in a d.c. circuit but not an inductor.

The inductor has infinite resistance in a d.c. circuit.

In a d.c. circuit, the inductor can conduct but not a capacitor.

In a d.c. circuit, both the inductor and capacitor cannot conduct.

Electromagnetic-theory Questions Set 68:

Find the loss tangent if the complex permittivity is given as 10 - j5.

Solution:

A wave has a reflection coefficient of 0.82. Find the transmission coefficient of the wave.

Solution:

Given the S matrix, determine if the network is lossless.

Solution:

Which of the following is not a type of Transmission Line Configuration?

Solution:

Two charges of equal magnitudes and at a distance R exert a force F on each other. If the charges are halved and the distance between them is doubled, then the new force acting on a charge is:

Solution:

A solenoid that is 1.5 m long and 0.4 cm in diameter has 10 turns per cm of length. If a current of 5 A flows through the solenoid, the magnetic field inside the solenoid is:

Solution:

In an AC series circuit, the instantaneous current is maximum when the instantaneous voltage is maximum. The circuit element that will have this behavior is a:

Solution:

At the charge-free boundary between two dielectric media, which of the following is true?

Solution:

In a directional coupler, which of the following statements is correct?

Solution:

Choose the correct statement about the behavior of inductors and capacitors in a d.c. circuit:

Solution:

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