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
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
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