1
GATE ECE 1989
+2
-0.6

In the circuit of figure, the power dissipated in the register R is 1W when only source '1' is present and '2' replaced by a short.The power dissipated in the same registor R is 4W when only source '2' is present and '1' is replaced by a short.When both the source '1' and '2' are present, the power dissipated in R will be:

A
1 W
B
3 W
C
4 W
D
5 W
2
GATE ECE 1989
+2
-0.6

A load, ZL = RL + jXL is to be matched, using an ideal transformer, to a generator of internal impedance, ZS = RS + jXS .The turns ratio of the transformer required is

A
$$\sqrt{\left|Z_\mathrm L\;/\;Z_\mathrm S\right|}$$
B
$$\sqrt{\left|R_\mathrm L\;/\;R_\mathrm S\right|}$$
C
$$\sqrt{\left|R_\mathrm L\;/\;Z_\mathrm S\right|}$$
D
$$\sqrt{\left|{\mathrm Z}_\mathrm L\;/\;R_\mathrm S\right|}$$
3
GATE ECE 1988
+2
-0.6

If an impedance ZL is connected across a voltage source V with source impedance ZS, then for maximum power transfer, the load impedance must be equal to

A
Source impedance ZS
B
Complex conjugate of ZS
C
Real part of ZS
D
Imaginary part of ZS
EXAM MAP
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