equivalent circuits, phasor diagram, attenuation constant, phase

What is the main purpose of the equivalent circuit model of a transmission line?

• To simplify the complex distributed circuit
• To increase the transmission line's surge impedance
• To reduce the power loss in the transmission line
• To decrease the phase constant of the transmission line

What is the unit of the attenuation constant in a transmission line?

• Ohm
• Hertz
• Meter
• Nepers

What does a phasor diagram of a transmission line represent?

• The magnitude and phase angle of voltage and current at a specific point on the line
• The frequency and wavelength of the signal traveling on the line
• The resistance and capacitance of the line per unit length
• The surge impedance and attenuation constant of the line

What is the phase constant of a transmission line?

• The ratio of the peak voltage to the average voltage on the line
• The speed at which the voltage and current waves travel on the line
• The measure of how much the voltage on the line lags behind the current
• The measure of how much the current on the line lags behind the voltage

What is surge impedance in a transmission line?

• The ratio of the electric field to the magnetic field in the line
• The resistance of the line per unit length
• The capacitance of the line per unit length
• The impedance of the line under surge conditions

What is the relationship between attenuation constant and distance in a transmission line?

• As the distance increases, the attenuation constant decreases
• As the distance increases, the attenuation constant increases
• Attenuation constant and distance are not related
• As the distance increases, the attenuation constant remains constant

What happens to the surge impedance of a transmission line as its inductance increases?

• It decreases
• It increases
• It remains the same
• It becomes negative

What is the effect of increasing the frequency on the phase constant of a transmission line?

• It increases
• It decreases
• It remains the same
• It becomes negative

What is the effect of increasing the length of a transmission line on the attenuation constant?

• It decreases
• It increases
• It remains the same
• It becomes negative

Which of the following is the correct expression for surge impedance?

• Zs = sqrt(L/C)
• Zs = sqrt(C/L)
• Zs = R+jwL
• Zs = 1/jwC