In high frequency circuits impedance matching can be done by open circuited stub

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Question
In high frequency circuits impedance matching can be done by
1. open circuited stubs
2. short circuited stubs
3. transformer
Which of the above correct?
Options
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

Correct Answer

1, 2 and 3

Explanation

All the three can be used for impedance matching in high frequency circuits.

More questions

2. A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
Options
A. 50 Mbps
B. 100 Mbps
C. 36 Mbps
D. 72 Mbps

4. During transmission over a communicate channel, bit errors occur independently with probability . If a block of 3 bits are transmitted, the probability of at most one bit error is equal to
Options
A.
B.
C.
D. none

5. A plane wave is characterized by the wave is
Options
A. linearly polarized
B. circularly polarized
C. elliptically polarized
D. unpolarized

7. In a semi converter feeding a resistive load,
Options
A. the waveshapes of input voltage and input current are always similar
B. the waveshapes of input voltage and input current can never be similar
C. the waveshapes of input voltage and input current are similar only if firing angle is zero
D. the waveshapes of input voltage and input current are similar only if firing angle is high

9. A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the starting torque is 100 N-m. At 25 Hz, the starting torque
Options
A. will be less than 100 N-m
B. will be more than 100 N-m
C. may be more or less than 100 N-m depending on motor parameters
D. very small

10. The phenomenon of overlap in converter operation due to
Options
A. source resistance
B. source inductance
C. both source resistance and source inductance
D. high value of firing angle

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