GATE EE 2011 Question Paper (13-Feb-2011) (Shift 2)

A 220V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1 and armature current is 10A. If the excitation of the machine is reduced by 10% the extra resistance to be put in the armature circuit to maintain the same speed and torque will be

A load centre of 120 MW derives power from two power stations connected by 220 kV transmission lines of 25 km and 75 km as shown in figure below. The three generators G₁, G₂ and G₃ are of 100 MW capacity each and have identical fuel cost characteristics. The minimum loss generation schedule for supplying the 120 MW load is?

A portion of the main program to call a subroutine SUB in an 8085 environment is given below.

$\begin{array}{cc}:& \\ :& \\ \mathrm{LXI}& \mathrm{D},\mathrm{DISP}\\ \mathrm{LP}:\mathrm{CALL}& \mathrm{SUB}\\ :& \\ :& \end{array}$

It is desired that control be returned to LP + DISP + 3 when the RET instruction is executed in the subroutine. The set of instructions that precede the RET instruction in the subroutine are:

The open loop transfer function G(s) of a unity feedback control system is given as,

$G(s)=\frac{k\left(s+\frac{2}{3}\right)}{s^2(s+2)}$

From the root locus, it can be inferred that when k tends to positive infinity.

The transistor is used in the circuit shown below has a β of 30 and I${}_{CB0}$ is negligible with V${}_{EE}$ = -12 V at emitter end.



V${}_{BE}$ = 0.7 V

V${}_{CE(sat)}$ = 0.2 V

If the forward voltage drop of diode is 0.7 V. Then the current through collector will be