ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Chapter 4.1, Problem 3RQ
To determine
Find the basic unit used to measure current.
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2.52. The step response s(t) of a continuous-time LTI system is given by
s(1) = [cos wol ]u(1)
Find the impulse response h(t) of the system.
Ans. h(t)=8(1) - wo[sin w₁t]u(t)
2.48. Show that if y(t) = x(t)* h(t), then
y' (t) = x' (1) * h(t) = x(t) * h'(t)
Hint: Differentiate Eqs. (2.6) and (2.10) with respect to t.
2.49.
Show that
x(1) * 8'(t) = x(t)
Hint: Use the result from Prob. 2.48 and Eq. (2.58).
2.47. Compute the convolution sum y[n] = x[n]+h[n] of the following pairs of sequences:
(a) x[n] = u[n], h[n] = 2"u[n]
(b) x[n]=u[n]-u[n-N], h[n]=a"u[n], 0 < a <1
(c) x[n]=()"u[n], h[n] = 8[n] - 8[n-1]
Chapter 4 Solutions
ELECTRICITY FOR TRADES
Ch. 4.1 - What is the practical unit of electric charge?Ch. 4.1 - Prob. 2RQCh. 4.1 - Prob. 3RQCh. 4.1 - Explain what a current flow of 1 ampere can be...Ch. 4.1 - Account for the fact that electric current travels...Ch. 4.1 - Prob. 6RQCh. 4.1 - Prob. 7RQCh. 4.1 - Prob. 8RQCh. 4.1 - Prob. 9RQCh. 4.1 - Prob. 10RQ
Ch. 4.1 - Prob. 11RQCh. 4.1 - Prob. 12RQCh. 4.1 - What is the cause and effect of resistance?Ch. 4.1 - When using an ohmmeter to measure resistance, what...Ch. 4.1 - Convert the following data: a. 12,000 A to kA b....Ch. 4.1 - Prob. 16RQCh. 4.2 - Define electric power.Ch. 4.2 - What is the basic unit used to measure electric...Ch. 4.2 - A toaster draws 8 amperes when connected to a...Ch. 4.2 - Prob. 4RQCh. 4.2 - Prob. 5RQCh. 4.2 - Prob. 6RQCh. 4.2 - Prob. 7RQCh. 4.2 - Compare a closed and an open electric circuit.Ch. 4.2 - Prob. 9RQCh. 4.2 - What does Ohms law tell us about current flow in a...Ch. 4.2 - Ohms law is applied to a circuit using what three...Ch. 4.2 - Prob. 12RQCh. 4.2 - Prob. 13RQCh. 4.2 - Prob. 14RQCh. 4.2 - Prob. 15RQCh. 4.2 - Prob. 16RQCh. 4.2 - Prob. 17RQCh. 4.2 - Prob. 18RQ
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- 2.55. Consider a discrete-time LTI system with impulse response h[n] given by Is this system memoryless? Ans. No, the system has memory. h[n] = [n-1]arrow_forward"4. The load impedance connected to the secondary winding of the ideal transformer in the following circuit consists of a resistance of 237.5m2 in series with an inductor of 125µH. If the sinusoidal voltage source v, is generating the voltage 2500 cos(400t) V, calculate the steady-state equations for: (a) 21. (b) v1. (c) i₂, and (d) v2." 08 0,255 mH 237,5 m2 10:1 01 - Ideal 02 125 pharrow_forward2.55. Consider a discrete-time LTI system with impulse response h[n] given by h[n]=8[n-1] Is this system memoryless? Ans. No, the system has memory.arrow_forward
- "1. Formulate the matrix system to find the voltages and currents of the transformer in the following circuit. Hint: Use KVL (Kirchhoff's Voltage Law) in each winding of the transformer and use the voltage and current relationships." RT www pNp Ns Rc Vp idealarrow_forward2.62. Write the input-output equation for the system shown in Fig. 2-34. Ans. 2y[n]-y[n-1] = 4x[n] + 2x[n-1] x[n] Unit delay Fig. 2-34 y[n] Σ + +arrow_forward(ii) Register B hold the data byte 28H and accumulator hold 97H. Show the contents of the registers B, C and accumulator after the execution of the following instructions. MOV A, B MOV C, Aarrow_forward
- 2.53. The system shown in Fig. 2-31 is formed by connection two systems in parallel. The impulse responses of the systems are given by h₁(t)=eu(1) and h₂(1) = 2e'u(1) (a) Find the impulse response h(t) of the overall system. (b) Is the overall system stable? Ans. (a) h(t) = (e-21 + 2e')u(t) (b) Yes x(t) h₁(1) + h₂(1) Fig. 2-31 + y(t) Σarrow_forward2.54. Consider an integrator whose input x(t) and output y(t) are related by y(t) = '_x(T) dT (a) Find the impulse response h(t) of the integrator. (b) Is the integrator stable? Ans. (a) h(t) = u(t) (b) Noarrow_forward2.61. Is the system described by the differential equation linear? Ans. No, it is nonlinear. dy(t) +5y(1)+2=x(1) dtarrow_forward
- 2.64. Consider a discrete-time system whose input x[n] and output y[n] are related by y[n] y[n-1] = x[n] with y[-1] = 0. Find the output y[n] for the following inputs: (a) x[n]=()u[n]; (b) x[n]=()u[n] Ans. (a) y[n] = 6[()*+' - (¹)" + ¹]u[n] (b) y[n] = (n+1X)"u[n]arrow_forwardQ5. Write a program in assembly language using instructions of SAP-III computers to complement the 256 bytes stored in memory locations 2500 H through 25FF H. Store the complemented data in memory locations starting at 2600 H.arrow_forwardmeinory (b). Write an assembly language program in 8085 microprocessors to exchange conte HL register pair with DE register pair using PUSH and POP instructions. 3 | Pagearrow_forward
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