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Electromagnetic-theory Questions Set 54:

Quiz Mode

The power factor, cos(θ), can vary between what values?

2 to 2.5

3.5 to 5

0 to 1

1 to 2

Solution:

A transmission line becomes distortion-free if

It is properly matched

It is terminated into Zo

LG = CR

LR = GC

Solution:

Which of the following parameters is negligible in transmission lines?

Resistance (R)

Inductance (L)

Capacitance (C)

Conductance (G)

Solution:

What is the result of applying excess voltage across a capacitor?

Arcing of the capacitor plates

Short circuit

Dielectric breakdown

All of the above

Solution:

A wave travelling in a transmission line has a wavelength of 5 units and velocity of 12 x 10⁷ units. Calculate its frequency.

24 MHz

60 MHz

2.4 MHz

6 MHz

Solution:

The frequency ranges for the X band and S band are:

2-4 GHz and 8-12 GHz respectively

18-27 GHz and 40-300 GHz respectively

8-12 GHz and 2-4 GHz respectively

27-40 GHz and 2-3 GHz

Solution:

An electric field on a plane is described by its potential V = 20 (r^-1 + r^-2), where r is the distance from the source. The field is due to:

A dipole

A monopole

A quadrupole

Both a monopole and a dipole

Solution:

A two-conductor transmission line is 10 cm long. A sinusoidal signal of 1 V peak amplitude is applied to one end of the line. If the signal travels on the line with a speed of 2 × 10^8 m/s, what is the transit time on the line?

1 ns

1.5 ns

0.5 ns

2 ns

Solution:

Which of the following statements about the effect of heating on semiconductor resistance is correct?

When we heat a semiconductor, its resistance increases

When we heat a semiconductor, its resistance decreases

The resistance of a semiconductor is independent of temperature

When we cool a semiconductor to 0 K, it becomes a superconductor

Solution:

When an AC voltage is applied to an LCR circuit, which of the following is true about the relationship between current (I) and voltage (V)?

I and V are out of phase with each other in the resistor (R)

I and V are in phase in the inductor (L) while in the capacitor (C), they are out of phase

I and V are 90° out of phase in both the capacitor (C) and the inductor (L)

I and V are out of phase in the inductor (L) and in phase in the capacitor (C)

Electromagnetic-theory Questions Set 54:

The power factor, cos(θ), can vary between what values?

Solution:

A transmission line becomes distortion-free if

Solution:

Which of the following parameters is negligible in transmission lines?

Solution:

What is the result of applying excess voltage across a capacitor?

Solution:

A wave travelling in a transmission line has a wavelength of 5 units and velocity of 12 x 10⁷ units. Calculate its frequency.

Solution:

The frequency ranges for the X band and S band are:

Solution:

An electric field on a plane is described by its potential V = 20 (r^-1 + r^-2), where r is the distance from the source. The field is due to:

Solution:

A two-conductor transmission line is 10 cm long. A sinusoidal signal of 1 V peak amplitude is applied to one end of the line. If the signal travels on the line with a speed of 2 × 10^8 m/s, what is the transit time on the line?

Solution:

Which of the following statements about the effect of heating on semiconductor resistance is correct?

Solution:

When an AC voltage is applied to an LCR circuit, which of the following is true about the relationship between current (I) and voltage (V)?

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 54:

The power factor, cos(θ), can vary between what values?

Solution:

A transmission line becomes distortion-free if

Solution:

Which of the following parameters is negligible in transmission lines?

Solution:

What is the result of applying excess voltage across a capacitor?

Solution:

A wave travelling in a transmission line has a wavelength of 5 units and velocity of 12 x 107 units. Calculate its frequency.

Solution:

The frequency ranges for the X band and S band are:

Solution:

An electric field on a plane is described by its potential V = 20 (r-1 + r-2), where r is the distance from the source. The field is due to:

Solution:

A two-conductor transmission line is 10 cm long. A sinusoidal signal of 1 V peak amplitude is applied to one end of the line. If the signal travels on the line with a speed of 2 × 10^8 m/s, what is the transit time on the line?

Solution:

Which of the following statements about the effect of heating on semiconductor resistance is correct?

Solution:

When an AC voltage is applied to an LCR circuit, which of the following is true about the relationship between current (I) and voltage (V)?

Solution:

Related Question Sets:

Related Topics:

A wave travelling in a transmission line has a wavelength of 5 units and velocity of 12 x 10⁷ units. Calculate its frequency.

An electric field on a plane is described by its potential V = 20 (r^-1 + r^-2), where r is the distance from the source. The field is due to: