Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Chapter 18, Problem 9RQ
To determine
Explain the function of a commutator.
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Check out a sample textbook solutionStudents have asked these similar questions
Determine the value of the commutator
a. -Px
b.
i (hbar) P z
OC
С.
i (hbar) Lz
d. A
e. 0
33. Parts (a) through (e) of this problem should be done by
inspection-that is, mentally. The intent is to obtain an
approximate solution without a lengthy series of calcula-
tions. For the network in Fig. 102:
a. What is the approximate value of I1, considering the
magnitude of the parallel elements?
b. What is the ratio I¡/I2? Based on the result of part (a),
what is an approximate value of 12?
c. What is the ratio I/I3? Based on the result, what is an
approximate value of I3?
d. What is the ratio I/I4? Based on the result, what is an
approximate value of I4?
e. What is the effect of the parallel 100 kN resistor on the
above calculations? How much smaller will the current
I4 be than the current I¡?
f. Calculate the current through the 1 2 resistor using the
current divider rule. How does it compare to the result
of part (a)?
g. Calculate the current through the 10 2 resistor. How
does it compare to the result of part (b)?
h. Calculate the current through the 1 kn resistor. How
does…
Answer both short questions correctly. I will rate accordingly.
Chapter 18 Solutions
Applied Physics (11th Edition)
Ch. 18.2 - Find the magnetic field at 0.250 m from a long...Ch. 18.2 - Prob. 2PCh. 18.2 - What is the current in a wire if the magnetic...Ch. 18.2 - A power line runs northsouth carrying 675 A and is...Ch. 18.2 - Prob. 5PCh. 18.2 - Find the current in a wire if the magnetic field...Ch. 18.2 - A solenoid has 1000 turns of wire, is 0.320 m...Ch. 18.2 - A solenoid has 3000 turns of wire and is 0.350 m...Ch. 18.2 - A small solenoid is 0.150 m in length and 0.0150 m...Ch. 18.2 - A solenoid has 2500 turns of wire and is 0.200 m...
Ch. 18.2 - A long solenoid has 1000 turns and is 0.250 m...Ch. 18.2 - A small solenoid 0.100 m in length has 1000 turns...Ch. 18.2 - An auto mechanic wants to use a solenoid she found...Ch. 18.2 - An earthmover requires a solenoid with 2500 turns...Ch. 18 - The presence of a magnetic force field may be...Ch. 18 - The deflection of a compass needle placed near a...Ch. 18 - Ampres rule relates a. the strength of a magnetic...Ch. 18 - The unit used to express the strength of a...Ch. 18 - Describe how a strong magnetic field can be...Ch. 18 - Describe how to determine the direction of a...Ch. 18 - Describe how a magnetic field is induced by a...Ch. 18 - Describe how a generator produces current.Ch. 18 - Prob. 9RQCh. 18 - Describe how a motor works.Ch. 18 - What is a synchronous motor, and how does it work?Ch. 18 - Distinguish between a universal motor and an...Ch. 18 - Distinguish between an armature and a stator.Ch. 18 - Prob. 14RQCh. 18 - Prob. 15RQCh. 18 - Prob. 16RQCh. 18 - If the number of turns per inch in a solenoid were...Ch. 18 - Describe how to find the flux lines near a bar...Ch. 18 - How is alternating current produced by a...Ch. 18 - Find the magnetic field at 0.255 m from a long...Ch. 18 - Prob. 2RPCh. 18 - What is the current in a wire if the magnetic...Ch. 18 - A solenoid has 2000 turns of wire, is 0.452 m...Ch. 18 - A solenoid has 2750 turns of wire and is 0.182 m...Ch. 18 - A power line running northsouth carrying 500 A is...Ch. 18 - A ships compass is mistakenly placed 8.35 cm away...Ch. 18 - Figure 18.10 shows a compass near a...Ch. 18 - A coaxial cable consists of an inner conducting...Ch. 18 - Prob. 4ACCh. 18 - Prob. 5AC
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- Chapter 27, Problem 055 SN In the figure Rs is to be adjusted in value by moving the sliding contact across it until points a and b are brought to the same potential. (One tests for this condition by momentarily connecting a sensitive ammeter between a and b; if these points are at the same potential, the ammeter will not deflect.) Express Rx in terms of R₁, R₁ and R₂ in the case when this adjustment is made. Rs だ R₁₂ Ro www R2₂ -Sliding contact Earrow_forward10:25 I+ 54% N (3 Imssb1.mutah.edu.jo/m سؤال 3 غير مجاب عليه بعد 10.00 الدرجة من علّم هذا السؤال Determine the equivalent capacitance ( in mF units) of the combination shown .when C = 33.7 mF %3D C To Tc Te C 2C اخترأحد الخيارات A. 26.96 B 16 85. +arrow_forwardI1, I2, and I3 refer to the currents through R1, R2, and R3. No longer in DC steady state, again ℰ and R₁ are unknown, R₂ = 7 Ω, R₃ = 2 Ω, L = 4 Henrys, I₂ = 10 A, and I₃ = 8 A. Calculate dI₃/dt.arrow_forward
- 4. Suppose that the clectric ficld can be obtained from a voltage, such that E = -VV. What is V x E, in that casc? Note: every electric ficld that we have encountered, so far, has bcen derivable from a potential. However, we will soon encounter induced clectric ficlds that are not. In that case, the curl of the clectric ficld will not be the answer you found for this problem.arrow_forwardHall potentials are much larger for poor conductors than for good conductors. Why?arrow_forwardShow that for V less than zero, InetI0.arrow_forward
- An electron with initial velocity vo = 1.54 × 105 m/s enters a region 1.0 cm long where it is electrically accelerated (see the figure). It emerges with velocity v = 5.50 × 106 m/s. What is its acceleration, assumed constant? (Such a process occurs in conventional television sets.) Number i Units Nonaccelerating Accelerating region region Path of electron Source of high voltagearrow_forwardConsider two long, parallel, and oppositely charged wires of radius r with their centers separated by a distance D. Assuming the charge is distributed uniformly on the surface of each wire, show that the capacitance per unit length of this pair of wires is given by the following equation. (Submit a file with a maximum size of 1 MB.) D Inarrow_forwardYou are part of a team working in a machine parts mechanic’s shop. An important customer has asked your company to provide springs with a very precise force constant k. You devise the electrical circuit shown to measure the spring constant of each of the springs to be provided to the customer. The circuit consists of two identical, parallel metal plates free to move, other than being connected to identical metal springs, a switch, and a battery with terminal voltage ΔV. With the switch open, the plates are uncharged, are separated by a distance d, and have a capacitance C. When the switch is closed, the plates become charged and attract each other. The distance between the plates changes by a factor f, after which the plates are in equilibrium between the spring forces and the attractive electric force between the plates. To keep the plates from going into oscillations, you hold each plate with insulating gloves as the switch is closed and apply a force on the plates that allows them…arrow_forward
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