Electrical Engineering - Online Test
Q1. 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.
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
at coordinate (2,1,0)
will be
Answer : Option C
Explaination / Solution:
Q2. 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
and their threshold voltages ae the current I is
Answer : Option D
Explaination / Solution:
Q3. 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
Explaination / Solution:
Q4. 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
Explaination / Solution:
Q5. The direct axis and quadrature axis reactance’s of a salient pole alternator are 1.2p.u and 1.0p.u respectively. The armature resistance is negligible. If this alternator is delivering rated kVA at upf and at rated voltage then its power angle is
Answer : Option B
Explaination / Solution:
Q6. 
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:
Q7. A two loop position control system is shown below
The gain k of the Tacho-generator influences mainly the
Answer : Option A
Explaination / Solution:
Q8. 
Two generator units G1 and G2 are connected by 15 kV line with a bus at the mid-point as shown below.
G1 = 250 MVA, 15kV, positive sequence reactance X = 25% on its own base
G2 = 100 MVA, 15kV, positive sequence reactance X = 10 % on its own base
L1 and L2 = 10km, positive sequence reactance X = 0.225 Ω / km
In the above system, the three-phase fault MVA at the bus 3 is
Answer : Option A
Explaination / Solution:
Q9. Which one of the following circuits is NOT equivalent to a 2-input XNOR
(exclusive NOR) gate?
Answer : Option D
Explaination / Solution:
All options except option ‘D’ gives EX-NOR gates
Q10. Two independent random variables X and Y are uniformly distributed in the interval [–1,1]. The probability that max[X, Y] is less than 1/2 is
Answer : Option B
Explaination / Solution:
