1.

Suppose that a system has its output, r ( r for response), related to its input, e ( e for excitation) by

Determine if the system is linear if (a) a = b and (b) b = ae.

2.

A system has its output, r ( r for response), related to its input, e ( e for excitation) by

Determine if the system is linear.

3.

Consider the voltage-current relationship for a particular circuit component

Is this component a linear component?

4.

Consider a device whose voltage-current relationship is given by

Is the device linear?

5.

Consider a diode whose voltage-current relationship is given by

Is the diode linear?

PROPORTIONALITY

6.

In the network of Fig 5.1, the resistance designators correspond to the resistance values. By assuming that I ₄ = 1 A, determine I ₃, I ₄, V ₁₂ and V ₁₄. (This is a repeat of Problem 2.28).

Figure 5.1

7.

In the network of Fig 5.2, the resistance designators correspond to the resistance values. By assuming that I ₂ = 1 A, determine I ₆ and V ₃. (This is a repeat of Problem 2.24).

Figure 5.2

8.

In the network of Fig 5.3, the resistance designators correspond to the resistance values. By assuming that V ₁ = 1 V, determine I ₄, I ₆ and V ₂.

Figure 5.3

9.