1. Cut-off wavelength for rectangular waveguide of a = 5 cm; b=4 cm supporting TE10 mode is ?

8 cm

2 cm

6 cm

10 cm

Answer: 10 cm

Explanation:


2. The cut-off wavelength of a rectangular waveguide of dimension 2 cm x 4 cm is ?

4 cm

2 cm

8 cm

None of the above

Answer: 4 cm

Explanation:


3. A waveguide section in a microwave circuit acts as ?

Band stop filter

LP filter

Bandpass filter

High Pass filter

Answer: High Pass filter

Explanation:


4. A waveguide section in a microwave circuit acts as ?

Highpass filter

Band stop filter

Bandpass filter

Lowpass filter

Answer: Highpass filter

Explanation:


5. In a TWT the amplitude of resultant wave travelling down the helix ?

decreases exponentially

increases exponentially

is almost constant

increases linearly

Answer: increases exponentially

Explanation:


6. Evanescent mode attenuation in a waveguide depends upon the ?

operating frequency

conductivity of the dielectric filling in the waveguide

standing waves in the guide

conductivity of the guide walls

Answer: conductivity of the dielectric filling in the waveguide

Explanation:


7. Screw projecting into the waveguide ?

is capacitive discontinuity

may be capacitive or inductive depending upon the position inside the guide

is inductive discontinuity

None of the above

Answer: may be capacitive or inductive depending upon the position inside the guide

Explanation:


8. A cavity resonator can be represented by ?

an LCR circuit

a lossy inductor

an LC circuit

a lossy capacitor

Answer: an LC circuit

Explanation:


9. Strictly speaking, the propagating mode that is excited in a micro strip transmission line is ?

non-TEM mode

only TE mode

only TEM mode

only TM mode

Answer: non-TEM mode

Explanation:


10. A strip line is analogous to a ?

rectangular waveguide

coaxial line

parallel wire line

circular waveguide

Answer: parallel wire line

Explanation: