CurrentGK Papers GAT(Graduate Aptitude Test In Engineering) Gate Electronics & Communication3

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 & Communication3

Gate Electronics & Communication3

1 The drain of an n-channel MOSFET is shorted to the gate so that VGS = VDS. The threshold voltage (VT) of MOSFET is 1 V. If the drain current (ID) is 1 mA for VGS = 2V, then for VGS = 3V, ID is
A) 2 mA
B) 3 mA
C) 9 mA
D) 4 mA
Answer : (D) 2 The first and the last critical frequency of an RC-driving point impedance function must respectively be
A) a zero and a pole
B) a zero and a zero
C) a pole and a pole
D) a pole and a zero
Answer : (D)

3 In what range should Re(s) remain so that the Laplace transform of the function e(a+2)t+5 exits?
A) Re (s) > a + 2
B) Re (s) > a + 7
C) Re (s) < 2
D) Re (s) > a + 5
Answer : (A)

4 A parallel plate air-filled capacitor has plate area of l0-4 m2 and plate separation of 10-3 m. It is connected to a 0.5 V, 3.6 GHz source. The magnitude of the displacement current is (e0 = 1/36p x 10-9 F/m)
A) 10 mA
B) 100 mA
C) 10 A
D) 1.59 mA
Answer : (A)
5 For the polynomial P(s) = s5 + s4 + 2s3 + 2s2 + 3s + 15, the number of roots which lie in the right half of the s-plane is
A) 4
B) 2
C) 3
D) 1
Answer : (B)

6 The phase velocity of an electromagnetic wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is
A) equal to its group velocity
B) less than the velocity of light in free space
C) equal to the velocity of light in free space
D) greater than the velocity of light in free space
Answer : (D)

7 A device with input x(t) and output y(t) is characterized by: y(t) = x2(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is
A) 370 kHz
B) 190 kHz
C) 380kHz
D) 95kHz
Answer : (C)

8 The Q - meter works on the principle of
A) mutual inductance
B) self inductance
C) series resonance
D) parallel resonance
Answer : (C)

9 The Fourier transform of a conjugate symmetric function is always
A) imaginary
B) conjugate anti-symmetric
C) real
D) conjugate symmetric
Answer : (C)

10 An ideal op-amp is an ideal
A) voltage controlled current source
B) voltage controlled voltage source
C) current controlled current source
D) current controlled voltage source
Answer : (B)

Related Posts



    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