If you find this context important and usefull. We request to all visitors to sheare this with your friends on social networking channels.

Gate Electronics & Communication4

Gate Electronics & Communication4

Q-1 A circuit has a resistance of 11 W, a coil of inductive reactance 120 W, and a capacitor with a 120-W reactance, all connected in series with a 110-V, 60-Hz power source. What is the potential difference across each circuit element?

A) (a) VR = 110 V, (b) VL = VC = 1.2 Kv
B) (a) VR = 120 V, (b) VL = VC = 2.4 kV
C) (a) VR = 4.8 V, (b) VL = VC = 0 kV
D) (a) VR = 5.0 V, (b) VL = VC = 8.0 V

Q-2 Applying DeMorgan's theorem to the expression , we get

A) (A+B)+C
B) A(B + C)
C) Both A & B
D) None of above

Q-4 Refer Below figure to Determine the resonant frequency…

A) 123.4 kHz
B) 61.7 kHz
C) 45.97 kHz
D) 23.1 kHz

Q-4 Express the decimal number 57 in binary.

A) 100101
B) 111010
C) 110010
D) 111001

Q-5 A vertical electric dipole antenna

a) radiates uniformly in all directions.
b) radiates uniformly in all horizontal directions, but more strongly in the vertical direction.
c) radiates most strongly and uniformly in the horizontal directions
d) does not radiate in the horizontal directions

Q-6 A particle oscillates according to the equation y=5.0 cos 23 t, where y is in centimeters. Find its frequency of oscillation and its position at t=0.15 s.

a) f = 23 Hz, y = -4.8 cm
B) f = 3.7 Hz, y = -5.0 cm
C) f = 3.7 Hz, y = -4.8 cm
D) f = 3.7 Hz, y = +4.8 cm

Q-7 A 10.0-µF capacitor is in series with a 40.0-W resistance, and the combination is connected to a 110-V, 60.0-Hz line. Calculate (a) the capacitive reactance, (b) the impedance of the circuit, (c) the current in the circuit, (d) the phase angle between current and supply voltage

A) (a) 0.0038W (b) 305W (c) 0.415 A (d) voltage lags by 8.58°
B) (a) 266W (b) 269W (c) 0.409 A (d) voltage lags by 81.4°
C) (a) 16 kW (b) 72 kW (c) 2.75 A (d) voltage lags by 6.63°
D) (a) 2.6 kW (b) 262W (c) 0.256 MA (d) voltage leads by 81.4°

Q-8 A circuit has a resistance of 11 W, a coil of inductive reactance 120 W, and a capacitor with a 120-W reactance, all connected in series with a 110-V, 60-Hz power source. What is the potential difference across each circuit element?

A) (a) VR = 110 V, (b) VL = VC = 1.2 Kv
B) (a) VR = 120 V, (b) VL = VC = 2.4 kV
C) (a) VR = 4.8 V, (b) VL = VC = 0 kV
D) (a) VR = 5.0 V, (b) VL = VC = 8.0 V

Q-9 What is the primary function of multiplexing?

A ) To match the frequency range of a signal to a particular channel.
B ) To reduce the bandwidth of a signal.
C ) To select one radio channel from a wide range of transmitted channels.
D ) To allow a number of signals to make use of a single communications channel.

Q-10 A second step to further increase system capacity is a digital access method called TDMA (Time Division Multiple Access). Using the same frequency channelization and reuse as FDMA analog but adding a time sharing element, the effective capacity is:

A) Doubled
B) Tripled
C) Reduced by one third
D) Unchanged

Q-11 What are Pseudo-Random noise sequences, or P/N Sequences?

A) P/N Sequences are known sequences which exhibit the properties or chracteristics of random sequences
B) P/N Sequences can be used to logically isolate users on the same physical (frequency) channel
C) P/N Sequences appear as random noise to everyone else, except to the transmitter and intended receiver
D) All of the above

Q-12 An op-amp integrator has a square-wave input. The output should be

A ) a sine wave.
B) a triangle wave
C) a square wave.
D) pure DC.

Q-13 What is the relationship between the series and parallel resonant frequencies of a quartz crystal?

A) They are equal.
B) Parallel resonant frequency is approximately 1 kHz higher than series resonant frequency
C) Series resonant frequency is approximately 1 kHz higher than parallel resonant frequency.
D) none of the above

Q-14 Refer Below figure to Determine the resonant frequency…

A) 123.4 kHz
B) 61.7 kHz
C) 45.97 kHz
D) 23.1 kHz

Q-15 Which FET amplifier(s) has (have) a phase inversion between input and output signals?

A) common-gate
B) common-drain
C) common-source
D) all of the above

## Tags

#

Current Affairs
♦ PRAGATI प्‍लेटफार्म एक _____________ स्तरीय प्रणाली है। » 3
♦ अंतर्राष्ट्रीय शिक्षा दिवस कब मनाया गया? » 24 जनवरी
♦ अंतर्राष्ट्रीय शिक्षा दिवस कब घोषित किया गया था? » 3 दिसंबर, 2018
♦ भारत-पाकिस्तान युद्ध कब स्थापित किया गया था? » 1965
♦ शिक्षा का अधिकार भारतीय संविधान के ____________ में डाला गया था » अनुच्छेद 21-ए
♦ ऑपरेशन शरद हवा कब खत्म हुआ? » 27 जनवरी, 2021
♦ शिक्षा का अधिकार ____________ आयु वर्ग के बच्चों के लिए एक बुनियादी अधिकार है। » 6 से 14
♦ मानव अधिकारों की सार्वभौमिक घोषणा के ____________ में शिक्षा का अधिकार शामिल है। » अनुच्छेद 26
♦ पेरियार टाइगर रिजर्व कहाँ स्थित है? » केरला
♦ नवंबर 2020 तक, भारत की स्थापित सौर ऊर्जा क्षमता ____________ है » 36.9 GW