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Which of the following is not a valid variable name in C? | |
A. | p_ce1 [Wrong Answer] |
B. | 1p_ce [Correct Answer] |
C. | p1_ce [Wrong Answer] |
D. | p _ced [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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⇒ A capacitor with initial charge q_{0} at t = 0^{+} acts as
current source
voltage source
short-circuit
open-circuit
⇒ In a synchro error detector, the output voltage is proportional to [ω(t)]^{n}, where ω(t) is the rotor velocity and n equals :
-2
-1
1
2
⇒ A computer program is used to read N and compute N !. IF N = 6, the result will be
6
12
720
1040
⇒ For a quadratic factor in transfer function the phase angle is not a function of damping factor.
TRUE
FALSE
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first order system
third order system
fourth order system
either (a) or (b) depending on the system
⇒ ROC of sequence x[n] = (3)^{n} ∪[n] + (4)^{n} ∪[- n - 1]
|z| > 4
3 < |z| < 4
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⇒ Which of these are allowed in Basic?
Arithmetic operators +, -, *, / etc.
Logical operators AND, OR, NOT
Relational operators =, <, > etc.
All of the above
⇒ A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at s = - 2 and s = - 4, and one simple zero at s = - 1. A unit step u(t) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is
[exp (- 2t) + exp (-4t)] u(t)
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⇒ The signal cos ω_{c}t + 0.5 cos ω_{m}t sin ω_{c}t is
FM only
AM only
both AM & FM
neither AM nor FM
⇒ Registers and counters are similar in the sense that they both
count pulses
store binary information
are made from an array of flip-flops and gates integrated on a single chip
are shift registers
⇒ At t = 0^{+}, the current i_{1- V/2R- V/4R- V/Rzero}
⇒ If 1.5% of the output of an amplifier is feedback positively to the input, the minimum gain required of the amplifier for oscillations to occur, is
16.6
44.4
66.6
75
⇒ A n-type silicon sample contains a donor concentration of N_{d} = 2 x 10^{16} cm^{-3}. The minority carrier hole lifetime is t_{p0} = 5 μs. The thermal equilibrium generation rate of hole is:
1.125 x 10^{9} cm^{-3} s^{-1}
0.625 x 10^{9} cm^{-3} s^{-1}
4.5 x 10^{9} cm^{-3} s^{-1}
2.25 x 10^{9} cm^{-3} s^{-1}
⇒ For measuring temperatures below 800°C with high accuracy, the best instrument is
optical pyrometer
thermistor based thermometer
GaAs junction diode thermometer
platinum resistance thermometer
⇒ A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. The frequency of oscillations is
1.1 kHz
2.5 kHz
3.3 kHz
6.5 kHz
⇒ A Hartley oscillator uses FET with g_{m} of 2 ms and r_{d} = 2 KΩ. The total coil inductance is 10 μH with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB.
7.11 MHz, 13.97 dB
7.3 MHz, 14.1 dB
6.93 MHz, 12.9 dB
7.4 MHz, 13 dB
⇒ Equipment using BCD numbers
pocket calculators
electronic counter
digital voltmeters
all of the above
⇒ A memoryless source emits n symbols each with a probability p. The entropy of the source as a function of n
increases as log n
decreases as log (1/n)
increases as n
increases as n log n