Maximum power transfer theorem(MPT)

Q. The value of the resistance, R, connected across the terminals, A and B, (ref. Fig.), which will absorb the maximum power, is

1. $4.00k\Omega$
2. $4.11k\Omega$
3. $8.00k\Omega$
4. $9.00k\Omega$

Q. Find the value of R that results in maximum power transfer to the 10 $\Omega$ resistor. Also find the maximum power $\left(P_{max}\right)$

1. $R=0,P_{max}=0.1W$
2. $R=20\Omega ,P_{max}=1.6W$
3. $R=0,P_{max}=1.6W$
4. $R=\infty ,P_{max}=1.6W$

Q. Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is

1. 0.8 $\Omega$
2. 1.4 $\Omega$
3. 2 $\Omega$
4. 2.8 $\Omega$

Q. A black box with a circuit in it is connected to a variable resistor. An ideal ammeter and an ideal voltmeter are used to measure current and voltage as shown.

R $\left(\Omega \right)$	$V\left(Volt\right)$	$i(Amp.)$
3	3	1.5
8	8	1.0
14	10.5	0.75

The maximum power that box can deliver is

1. 8.5 W
2. 8.1 W
3. 8 W
4. 7.9 W

Q. In the circuit shown below, $V_s$ is constant voltage source and $I_L$ is a current load.

The value of $I_L$ that maximixes the power absorbed by the constant current load is

1. $\frac{V_s}{4R}$
2. $\frac{V_s}{2R}$
3. $\frac{V_s}{4R}$
4. $\infty$

Q. A benchtop dc power supply acts as an ideal 4 A current source as long as its terminal voltage is below 10V. Beyond this point, it begins to behave as an ideal 10V voltage source for all load currents going down to 0 A. When connected to an ideal rheostat, find the load resistance value at which maximum power is transferred, and the corresponding load voltage and current.

1. $2.5\Omega ,4A,10V$
2. $2.5\Omega ,4A,10V$
3. Open, 4 A, 0 V
4. Short, $\infty A$, 10 V

Q.

A generator of internal impendance, $Z_G$, delivers maximum power to a load impendance, $Z_L$, only if $Z_L$ = __.

1. 0

Q. In the circuit shown below, the safe maximum value for the current I is

1. 0.5 A
2. 0.1 A
3. 1.0 A
4. 0.05 A

Q. If the secondary winding of the ideal transformer shown in the circuit of figure has 40 turns, the number of turns in the primary winding for maximum power transfer to the 2 $\Omega$ resistor will be

1. 20
2. 40
3. 80
4. 160