1
GATE EE 2013
+1
-0.3
A source $$v_s\left(t\right)=V\cos100\mathrm{πt}$$ has an internal impedance of (4 + j3) Ω.If a purely resistive load connected to this source has to extract the maximum power out of the source, its value in Ω should be
A
3
B
4
C
5
D
7
2
GATE EE 2013
+2
-0.6
In the circuit shown below, if the source voltage $$V_s=100\angle53.12^\circ\;V$$ then the Thevenin’s equivalent voltage in Volts as seen by the load resistance RL is
A
$$100\angle90^\circ$$
B
$$800\angle0^\circ$$
C
$$800\angle90^\circ$$
D
$$100\angle60^\circ$$
3
GATE EE 2013
+2
-0.6
Two magnetically uncoupled inductive coils have Q factors q1 and q2 at the chosen operating frequency. Their respective resistances are R1 and R2 . When connected in series, their effective Q factor at the same operating frequency is
A
$$q_1R_1+q_2R_2$$
B
$$q_1/R_1+q_2/R_2$$
C
$$\left(q_1R_1+q_2R_2\right)/\left(R_1+R_2\right)$$
D
$$q_1R_2+q_2R_1$$
4
GATE EE 2013
+1
-0.3
The input impedance of the permanent magnet moving coil $$(PMMC)$$ voltmeter is infinite. Assuming that the diode shown in the figure below is ideal, the reading of the voltmeter in Volts is
A
$$4.46$$
B
$$3.15$$
C
$$2.23$$
D
$$0$$
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