ECE :: Exam Questions Paper
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The electric field of 2.5 x 107 V/m can give 1 eV energy to condition electron, then in a copper block what will be the mean free path of electron?
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25 persons are in a room. 15 of them play hockey, 17 of them play football and 10 of them play both hockey and football. Then the number of persons playing neither hockey nor football is:
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For the circuit shown in the following figure I0-I3 are inputs to the 4:1 multiplexer R(MSB) and S are control bits
The output Z can be represented by -
The transfer function of a system is
. For a unit-step input to the system the approximate setting time for 2% criterion is : -
The impulse response of an initially relaxed linear system is e-2tu(t) . To produce a response te-2tU(t), the input must be equal to __________ .
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The continuous time system with impulse response h(t)
u(t) is stable, if __________ (n is even). -
Consider the following diagrams showing vector fields :
The correct statements are
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Find resistance RB to bring transistor to threshold of saturation (VCB = 0), VBE = 0.7 V, a = 0.96
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for 2% = 4 sec.
sec.
should be < 0 
= 0, ∇ x 
and circulation around any closed path in it may be equal to zero. 
.
= 0.07 A 
= 24 
= 3 mA 
= 1433.33 Ω ≅ 1.5 KΩ.