Figure 20.43 Hydroelectric generators at the Hoover dam. (credit: Jon Sullivan)

Q: A generator produces 21.0 V when turning at 870 rev/min. What emf does it produce when turning at…

A: emf induced = 21 V when the coild turns at 870 rev/min New angular speed = 510 rev/min Let the…

Q: Find the direction of the current in the resistor shown inFigure P20.16 (a) at the instant the…

A: Explanation for Part a:

Q: A long straigt aive twisted into loop of radios is 0.1 m. a Current flows clock wise find the of the…

A: radius (r) = 0.1 m Current (I) = 20 A , clockwise

Q: At what velocity (in revolutions per minute) will the peak voltage of a generator be 490 V, if its…

A: Peak voltage , εpeak = 490 V Turns , N = 490  Diameter = 8 cm  Radius , R = 4 cm = 4 x 10-2 m…

Q: A DC winch motor is rated at 20.00 A with a voltage of 115 V. When the motor is running at its…

A:

Q: R2=60 R1=82 Position Voltage Current Resistance Power(W) (A) (0) (V) 1 R3-30 3. 30V Total Ω Ω 30V…

A: By finding equivalent resistance, we have to complete the table.

Q: You want to design a linear motor that can deliver 1 hp at a steady bar velocity of 20 m/s. The flux…

A:

Q: The voltage of an alternating current is given by e=80cos 377t+ 2 1 Use graph paper and proper scale…

A: Voltage is represented below.

Q: A capacitive sending probe 2.7 m high has a capacitance of 157 pF in air and 7,4 nF when partially…

A:

Q: Two forces of magnitude 8N and 4N acts at right angle to each other. What is the resultant and the…

A:

Q: At what velocity (in revolutions per minute) will the peak voltage of a generator be 490 V, if its…

A: Peak voltage , εmax = 490 V Number of turns , N = 490  Diameter , D = 8 cm  Radius , R = 4 cm = 0.04…

Q: When you turn the shaft of an electric motor by hand, what occurs in the interior coils of wire?

A: The coil of the wire rotates as you turn the shaft of an electric motor by hand.

Q: Example

A:

Q: The square loop in FigureP20.62 is made of wires with atotal series resistance of 10.0 Ω.It is…

A:

Q: A straight rod moves along parallel con- ducting rails, as shown. The rails are con- nected at the…

A:

Q: JUNCTION - V½ = 10 V V, = 5 V Rg= 4h The directions assigned for the currents I,, Iz, Is R, = 2 are…

A:

Q: 1.31 Resolve the 360-lb force into components along the cables AB and AC. Use a = 55° and ß = 30°.

A:

Q: The switch S in Figure 20.27 is closed at t = 0 and the currentat a reference time tref > 0 is…

A: Part a:

Q: ii) Discuss what will the force be if the following situation is changed so that the wires are…

A: Current in 1st wire is I1 = 8 A Current in second wire is I2 = 4 A Distance between the wires is R =…

Q: What law considered as a working principle of the most of the electrical motors, generators,…

A: electrical motors and generators are the devices which are used to mainly convert electrical energy…

Q: A 120-V, series-wound motor has a field resistance of 80 Ω and an armature resistance of 10 Ω . When…

A: Given Data: The supplied emf is, ε=120 V The field resistance is, Rf=80 Ω The armature resistance…

Q: .An alternating current is represented by the equation l = 20 sin(100rt). Compute its frequency

A: Given data:  Alternating current (I) = 20sin(100πt) Required: The frequency of alternating current

Q: A generator produces 18.0 V when turning at 920 rev/min. What emf does it produce when turning at…

A: Let,  E1=18.0 Vf1=920 rev/minf2 = 520 rev/min To determine: E2

Q: An old microwave oven outputs only half the electric field it used to. How much longer does it take…

A: Given data: The electric field output of the old microwave is E'=E/2.   The expression for the…

Q: List any three industrial applications of DC motors.

A: A DC motor or direct current motor is a device which converts direct current electric input into…

Q: If magnetic coils are powered by AC, why don’t their contacts open and close 120 times per second?

A: The overload relay (OLR) is similar in design which is used in manual motor starters. The basic…

Q: Hydroelectric generators at Hoover Dam produce a maximum current of 8.00×103 A at 250 kV. (a) What…

A: The expression for the power output,

Q: A 50H inductor and a resistance of 30 ohms is connected to a battery whose electromotive force is…

A:

Q: The severity of an electrical shock depends on all of the following except: O The duration of the…

A: The severity of electric shock depends on contact with the source of shock .

Q: A generator produces 18.0 V when turning at 920 rev/min. What emf does it produce when turning at…

A: Given data The emf produced by the generator E1 = 18 V at the frequency n1 = 920 rev/min. Another…

Q: 0.2 H inductor and 146 ohm resistor are connected to a 12V battery. When will the current will…

A:

Q: II) For the transmission of electric power from power plantto home, as depicted in Fig. 21–25, where…

A: Given Data: The power transmitted is, P = 100 kW. The voltage is, V = 12000 V. The stepping factor…

Q: 9 A melal of borwith mass m car slide over 2 frictan less , Paralel metal rails wheh are separated…

A:

Q: You want to protect an electrical equipment from getting damaged due to sudden surges in current?…

A:

Q: 03, 60 04 02 08 07 01 4. Based on the figure as shown, the odd numbered currents are going out of…

A: In the given figure for i=4.50mA, we have to determine the value of the American loops drawn.

Q: suppose a conducting rod with length of 25cm is pulled along the a rotated U-shaped conductor…

A:

Q: A generator produces 24.0 V when turning at 900 rev/min. What emf does it produce when turning at…

A: The formula for the emf generated is given by  e = N B A w where, N is the number of turns, B is the…

Q: ind -> In the image below, the direction of the current and the self-induced electromotive force are…

A: As we see from the circuit  Direction of induced emf 'E ind' is in the same direction of current…

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.