Electric Circuits (10th Edition)
Electric Circuits (10th Edition)
10th Edition
ISBN: 9780133760033
Author: James W. Nilsson, Susan Riedel
Publisher: PEARSON
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Chapter 12, Problem 1P

(a)

To determine

Plot the sketch of given function f(t) over the interval 0st.

(a)

Expert Solution
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Explanation of Solution

Given data:

f(t)={0, t05t, 0st10s5t+100, 10st30s50, 30st40s2.5t150, 40st60s0, 60st<

Calculation:

Construct a single continuous definition for the function using step function as follows:

0,att0;5t,onatt=0,offatt=10;5t+100,onatt=10,offatt=30;50,onatt=30,offatt=40;2.5t150,onatt=40,offatt=60;0,at60t<

Use the values and draw the sketch of expression f(t) as shown in Figure 1.

Electric Circuits (10th Edition), Chapter 12, Problem 1P

Conclusion:

Thus, the sketch of given expression f(t) is shown in Figure 1.

(b)

To determine

Write the expression for the given function f(t) using the concept of window function.

(b)

Expert Solution
Check Mark

Answer to Problem 1P

The expression for the given function f(t) is {5t[u(t)u(t10)]+(1005t)[u(t10)u(t30)]50[u(t30)u(t40)]+(2.5t150)[u(t40)u(t60)]}.

Explanation of Solution

Calculation:

Construct a single continuous definition for the function using step function as follows:

0,att0;5t,onatt=0,offatt=10;5t+100,onatt=10,offatt=30;50,onatt=30,offatt=40;2.5t150,onatt=40,offatt=60;0,at60t<

Use the values and write the expression for f(t) as follows:

f(t)={5t[u(t)u(t10)]+(1005t)[u(t10)u(t30)]50[u(t30)u(t40)]+(2.5t150)[u(t40)u(t60)]}

Conclusion:

Thus, the expression for the given function f(t) is {5t[u(t)u(t10)]+(1005t)[u(t10)u(t30)]50[u(t30)u(t40)]+(2.5t150)[u(t40)u(t60)]}.

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