Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 2, Problem 2.5Q
List and describe the types of losses that occur in a transformer.
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For the circuit shown, find
(i) closed-loop voltage gain
(ii) Z i of the circuit
(iii) f_max. The slew rate is 0.6V/us.
((write your answer in Kilo ohm))
2Vpp
R
ww
20 kQ
R₁
ww
200 ΚΩ
9+18 V
- 18 V
10 kn R₁₂
ΚΩ
((write your answer in KHz))
illustrate the phenomenon of phase reversal in CE amplifier
i- When signal current =OA, so IB-8uA
ii- When input signal reaches positive peak, so IB=16uA
ii- When input signal reaches negative peak, so IB=4uA
R₁
www
+ Vcc = 12V
Rc=6kn
16 A
8 μA
4 μА
0
www
RE
ẞ = 100
VC
In the circuit shown, find the voltage gain. Given that ẞ = 80 and input resistance Rin=2kQ.
SIGNAL
+10 V
Rc=6kn
4-2
210
Chapter 2 Solutions
Electric machinery fundamentals
Ch. 2 - Is the turns ratio of a transformer the same as...Ch. 2 - Why does the magnetization current impose an upper...Ch. 2 - What components compose the excitation current of...Ch. 2 - What is the leakage flux in a transformer? Why is...Ch. 2 - List and describe the types of losses that occur...Ch. 2 - Why does the power factor of a load affect the...Ch. 2 - Why does the short-circuit test essentially show...Ch. 2 - Why does the open-circuit test essentially show...Ch. 2 - How does the per-unit system of measurement...Ch. 2 - Why can autotransformers handle more power than...
Ch. 2 - What are transformer taps? Why are they used?Ch. 2 - What are the problems associated with the Y—Y...Ch. 2 - What is a TCUL transformer?Ch. 2 - How can three-phase transformation be accomplished...Ch. 2 - Prob. 2.15QCh. 2 - Can a 60-Hz transformer be operated on a 50-Hz...Ch. 2 - What happens to a transformer when it is first...Ch. 2 - What is a potential transform? How is it used?Ch. 2 - What is a current transformer? How is it used?Ch. 2 - A distribution transformer is rated at 18 kVA,...Ch. 2 - Why does one hear a hum when standing near a large...Ch. 2 - A 100-kVA, 8000/277-V distribution transformer has...Ch. 2 - A single-phase power system is shown in Figure...Ch. 2 - Consider a simple power system consisting of an...Ch. 2 - The secondary winding of a real transformer has a...Ch. 2 - When travelers from the USA and Canada visit...Ch. 2 - A 1000-VA, 230/115-V transformer has been tested...Ch. 2 - A 30-kVA, 8000/230-V distribution transformer has...Ch. 2 - A 150-MVA, 15/200-kV, single-phase power...Ch. 2 - A 5000-kVA, 230/13.8-kV, single-phase power...Ch. 2 - A three-phase transformer bank is to handle 500...Ch. 2 - A 100-MVA, 230/115-kV, Y three-phase power...Ch. 2 - Three 20-kVA, 24,000/277-V distribution...Ch. 2 - A 14,000/480-V, three-phase, Y-connected...Ch. 2 - A 13.8-kV, single-phase generator supplies power...Ch. 2 - An autotransformer is used to connect a 12.6-kV...Ch. 2 - Prove the following statement: If a transformer...Ch. 2 - A 10-kVA, 480/120-V conventional transformer is to...Ch. 2 - A 10-kVA, 480/120-V conventional transformer is to...Ch. 2 - Two phases of a 14.4-kV, three-phase distribution...Ch. 2 - A 50-kVA, 20,000/480-V, 60-Hz, single-phase...Ch. 2 - Prove that the three-phase system of voltages on...Ch. 2 - Prove that the three-phase system of voltages on...Ch. 2 - A single-phase, 10-kVA, 480/120-V transformer is...Ch. 2 - Figure P2-4 shows a one-line diagram of a power...
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- For the transistor amplifier shown, R₁-11kQ, R2=6kQ, Rc=2kQ, RE-3kQ and R₁=2k0. (i) Draw d.c. load line (ii) Determine the DC operating point (iii) Draw a.c. load line. Assume V_BE = 0.7 V. and determine the new operating point + Vcc = 15 V RC Cc Cin R1 wwwwww wwwww R₁₂ RE CE RLarrow_forwardthe first part is the second part write your answer such as: (AND, OR, INVERTER, NAND, NOR) D₁ AK D, R₁ B K First Part? the third part is , and the total are R4 R7 Output R5 R₁ T R6 R3 -UBB Second Part? Third Part? Total?arrow_forwardA multistage amplifier has six stages each of which has a power gain of 40. what is the - Total gain of the amplifier in db ? ii- If the negative feedback of 15db is employed, find the resultant gainarrow_forward
- 9.36 Consider the finite-state machine logic implementation in Figure P9.36. (a) Determine the next-state and output logic expressions. (b) Determine the number of possible states. J1 Clk K₁ 101 Ут J2 Clk K₂ Clk Figure P9.36 0 y2 10arrow_forward9.34 Consider the finite-state machine logic implementation in Figure P9.34. (a) Determine the next-state and output logic expressions. (b) Determine the number of possible states. (c) Construct a state assigned table. (d) Construct a state table. (e) Construct a state diagram. (f) Determine the function of the finite-state machine. T₁ x Clk Figure P9.34 Q Clk Q الا T₂ Q 32 Clk Q T3 Q Clk Q Узarrow_forward9.35 Consider the finite-state machine logic implementation in Figure P9.35. (a) Determine the next-state and output logic expressions. (b) Determine the number of possible states. (c) Construct a state assigned table. (d) Construct a state table. (e) Construct a state diagram. (f) Determine the function of the finite-state machine. Clk J Clk K₁ 10 Ут J2 Clk K₂ 10 32 Figure P9.35arrow_forward
- 9.56 Using JK flip-flops, design a synchronous counter that counts in the sequence 1, 3, 0, 2, 1, ... The counter counts only when its enable input x is equal to 1; otherwise, the counter is idle.arrow_forward9.65 Using T flip-flops, design a synchronous counter that counts in the sequence 0, 2, 4, 6, 0, ... The counter counts only when its enable input x is equal to 1; otherwise, the counter is idle.arrow_forward2 Using D flip-flops, design a synchronous counter that counts in the sequence 1, 4, 7, 1, The counter counts only when its enable input x is equal to 1; otherwise, the counter is idle.arrow_forward
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