Electronics Engineering - Online Test

Q1. A clipper circuit is shown below.

Assuming forward voltage drops of the diodes to be 0.7V, the input-output transfer characteristics of the circuit is
Answer : Option C
Explaination / Solution:



Q2. The simplified SOP (Sum of Product) form of the Boolean expression 
 is
Answer : Option B
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Q3. In the sum of products function f (X, Y, Z) = ∑(2, 3, 4, 5), the prime implicants are
Answer : Option A
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Q4. In the circuit shown below, the current through the inductor is

Answer : Option C
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Q5. In the circuit shown below the op-amps are ideal. Then Vout in Volts is

Answer : Option C
Explaination / Solution:
No Explaination.


Q6. The magnitude of magnetic flux density  at a point having normal distance d meters from an infinitely extended wire carrying current of l A is  (in SI units). An infinitely extended wire is laid along the x-axis and is carrying current of 4 A in the +ve x direction. Another infinitely extended wire is laid along the y-axis and is carrying 2 A current in the +ve y direction µ0 is permeability of free space Assume   to be unit vectors along x, y and z axes respectively. 

Assuming right handed coordinate system, magnetic field intensity,  at coordinate (2,1,0) will be 

Answer : Option C
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Q7. In the CMOS inverter circuit shown, if the trans conductance parameters of the NMOS and PMOS transistors are
and their threshold voltages ae   the current I is

Answer : Option D
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Q8. During transmission over a certain binary communication channel, bit errors occur independently with probability p. The probability of AT MOST one bit in error in a block of n bits is given by
Answer : Option C
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Q9. A zero mean random signal is uniformly distributed between limits –a and +a and its mean square value is equal to its variance. Then the r.m.s value of the signal is
Answer : Option A
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Q10.
A three – bus network is shown in the figure below indicating the p.u. impedances of each element.

The bus admittance matrix, Y – bus, of the network is
Answer : Option B
Explaination / Solution: