an investigation on flux density of three phase distrubuted air
... equivalent maximum magnetic flux (Φm), integers which are depend on transformers structure (Km and K), number of turns (N) as defined in equations given above. Winding turns can be calculate from value of reactor’s inductance and Ag / lg ratio. Ag is air-gap area and lg is total air-gap length. In t ...
... equivalent maximum magnetic flux (Φm), integers which are depend on transformers structure (Km and K), number of turns (N) as defined in equations given above. Winding turns can be calculate from value of reactor’s inductance and Ag / lg ratio. Ag is air-gap area and lg is total air-gap length. In t ...
CTFaradayAns
... Answer: The B-field from a bar magnet points out of the North pole. As seen from above, the field through the loop is out (toward the observer). As the magnet is pulled away, the flux is decreasing. To fight the decrease, the induced B-field should add to the original B-field, and also be out (towar ...
... Answer: The B-field from a bar magnet points out of the North pole. As seen from above, the field through the loop is out (toward the observer). As the magnet is pulled away, the flux is decreasing. To fight the decrease, the induced B-field should add to the original B-field, and also be out (towar ...
unit 2 dc machines
... Characteristic (O.C.C.), (ii) Internal or Total Characteristic and (iii) External Characteristic. These characteristics of DC generators are explained below. 1. Open Circuit Characteristic (O.C.C.) (E0/If) Open circuit characteristic is also known as magnetic characteristic or no-load saturation cha ...
... Characteristic (O.C.C.), (ii) Internal or Total Characteristic and (iii) External Characteristic. These characteristics of DC generators are explained below. 1. Open Circuit Characteristic (O.C.C.) (E0/If) Open circuit characteristic is also known as magnetic characteristic or no-load saturation cha ...
cired reduction factor of feeding lines that have a cable and an
... in many cases and the approximation ri≈rc can be used. If the discontinuity point is on the line itself, the reduction effect of this type of cables is less pronounced, because the grounding impedance ZD is larger in that case (Pb=∞). The parameters k and Z∞ are defined by the following relations In ...
... in many cases and the approximation ri≈rc can be used. If the discontinuity point is on the line itself, the reduction effect of this type of cables is less pronounced, because the grounding impedance ZD is larger in that case (Pb=∞). The parameters k and Z∞ are defined by the following relations In ...
Ch 17 Electromagnetic Induction
... (ii) The current sensor is used to monitor the current induced in the long wire. (iii)The respective current-time graphs for upward and downward motions are shown on the computer. (d) Result and conclusion: Fig. 17.7(b)(c) (p. 147) A current flows through the wire if its ends are connected to a clos ...
... (ii) The current sensor is used to monitor the current induced in the long wire. (iii)The respective current-time graphs for upward and downward motions are shown on the computer. (d) Result and conclusion: Fig. 17.7(b)(c) (p. 147) A current flows through the wire if its ends are connected to a clos ...
MXL Tech Memo
... where Br is the remanence (measuring the strength of the magnetic field created by the magnet), and Hc is the coercivity (material’s resistance to becoming demagnetized). Neodymium magnets have much higher coercivity than AlNiCo magnets. Materials with low coercive forces such as AlNiCo-5 is easily ...
... where Br is the remanence (measuring the strength of the magnetic field created by the magnet), and Hc is the coercivity (material’s resistance to becoming demagnetized). Neodymium magnets have much higher coercivity than AlNiCo magnets. Materials with low coercive forces such as AlNiCo-5 is easily ...
Element 4: Electrical Hazards and Control
... • Between 2 and 10 mA current starts to flow through the body and stimulates muscles to contract. This can be felt, it causes muscles to tremble and it may hurt. But the person receiving the shock is able to control their muscles and can let go of the live object. • Between 10 and 60 mA current st ...
... • Between 2 and 10 mA current starts to flow through the body and stimulates muscles to contract. This can be felt, it causes muscles to tremble and it may hurt. But the person receiving the shock is able to control their muscles and can let go of the live object. • Between 10 and 60 mA current st ...
power point - North Dakota State University
... • Consider the same loop described above – i.e., a loop of 1 mm radius made from 1 turn of 0.1 mm wire – to investigate the induced current on a small loop as a result of an incident magnetic field. • The intent of this work is to provide approximate closedform expressions that can be used to descri ...
... • Consider the same loop described above – i.e., a loop of 1 mm radius made from 1 turn of 0.1 mm wire – to investigate the induced current on a small loop as a result of an incident magnetic field. • The intent of this work is to provide approximate closedform expressions that can be used to descri ...
Chapter 5 ELECTRIC CURRENTS
... is a potential (energy) diference between points A and B because work has been done on the resistor and there will be an energy diference per unit charge through the resistor. When it gets to the second load, again energy is dissipated and there is a potential diference between either side of th ...
... is a potential (energy) diference between points A and B because work has been done on the resistor and there will be an energy diference per unit charge through the resistor. When it gets to the second load, again energy is dissipated and there is a potential diference between either side of th ...
2. types of insulators
... (iv)The suspension arrangement provides greater flexibility to the line. The connection at the cross arm is such that insulator string is free to swing in any direction and can take up the position where mechanical stresses are minimum. (v) In case of increased demand on the transmission line, it is ...
... (iv)The suspension arrangement provides greater flexibility to the line. The connection at the cross arm is such that insulator string is free to swing in any direction and can take up the position where mechanical stresses are minimum. (v) In case of increased demand on the transmission line, it is ...
Question Bank 1. Electromagnetism 2. Magnetic Effects
... (b) A magnetic field is set up by this coil due to the passage of electric current. The magnetic field of the coil is at right angles to the magnetic field of permanent magnet. Thus, a magnetic couple acts, which turns the coil. (c) Fleming’s Left Hand Rule : It tells the direction of motion of con ...
... (b) A magnetic field is set up by this coil due to the passage of electric current. The magnetic field of the coil is at right angles to the magnetic field of permanent magnet. Thus, a magnetic couple acts, which turns the coil. (c) Fleming’s Left Hand Rule : It tells the direction of motion of con ...
Magnetic Fields - Review
... Magnetic Fields - Review The magnitude of the magnetic field produced by an electric current depends on • the magnitude of the current - the greater the current, the stronger the magnetic field • the distance from the conductor - the greater the distance from the wire, the weaker the magnetic field ...
... Magnetic Fields - Review The magnitude of the magnetic field produced by an electric current depends on • the magnitude of the current - the greater the current, the stronger the magnetic field • the distance from the conductor - the greater the distance from the wire, the weaker the magnetic field ...
simple`` wire`hf`antenna`
... A'horizontally'orientated'antenna,' such'as'a'dipole,'emits'a' horizontally'polarized'electric' wave'that'is'parallel'to'surface'of' the'earth'(like'the'antenna)' A'ver2cally'orientated'antenna,' such'as'a'mobile'whip,'emits'a' ver2cally'polarized'electric'wave' that'is'perpendicular'to'the' surface ...
... A'horizontally'orientated'antenna,' such'as'a'dipole,'emits'a' horizontally'polarized'electric' wave'that'is'parallel'to'surface'of' the'earth'(like'the'antenna)' A'ver2cally'orientated'antenna,' such'as'a'mobile'whip,'emits'a' ver2cally'polarized'electric'wave' that'is'perpendicular'to'the' surface ...
DEMONSTRATION EXPERIMENTS IN PHYSICS
... rod as in E-2. The pith balls are charged by contact with a hard rubber or a glass rod, and after the first contact their efforts to keep away from the rod are amusing and instructive. The distance betweenthe pith balls, their masses, and the lengths of the supporting threads may be given to the cla ...
... rod as in E-2. The pith balls are charged by contact with a hard rubber or a glass rod, and after the first contact their efforts to keep away from the rod are amusing and instructive. The distance betweenthe pith balls, their masses, and the lengths of the supporting threads may be given to the cla ...
Skin effect
Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor. The electric current flows mainly at the ""skin"" of the conductor, between the outer surface and a level called the skin depth. The skin effect causes the effective resistance of the conductor to increase at higher frequencies where the skin depth is smaller, thus reducing the effective cross-section of the conductor. The skin effect is due to opposing eddy currents induced by the changing magnetic field resulting from the alternating current. At 60 Hz in copper, the skin depth is about 8.5 mm. At high frequencies the skin depth becomes much smaller. Increased AC resistance due to the skin effect can be mitigated by using specially woven litz wire. Because the interior of a large conductor carries so little of the current, tubular conductors such as pipe can be used to save weight and cost.