1
GATE ECE 2013
+1
-0.3
A source vs(t) = V cos 100 $$\pi$$t has an internal impedance of (4 + j3) $$\Omega$$. If a purely resistive load connected to this source has to extract the maximum power out of the source, its value in $$\Omega$$ shoud be
A
3
B
4
C
5
D
7
2
GATE ECE 2011
+1
-0.3
In the circuit shown below the value of RL such that the power transferred to RL is maximum
A
$$5\Omega$$
B
$$10\Omega$$
C
$$15\Omega$$
D
$$20\Omega$$
3
GATE ECE 2011
+1
-0.3
In the circuit shown below, the Norton equivalent current in amperes with respect to terminals P and Q is
A
6.4 - j 4.8
B
6.56 - j 7.87
C
10 + j 0
D
16 + j 0
4
GATE ECE 2009
+1
-0.3

A fully charged mobile phone with a 12 V battery is good for a 10 minute talk-time. Assume that, during the talk-time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk-time?

A
220 J
B
12 kJ
C
13.2 kJ
D
14.4 kJ
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