symbol ∇. Del may denote the gradient (locally steepest slope)‚ the divergence of a vector field‚ or the curl (rotation) of a vector field. The symbol ∇ can be interpreted as a vector of partial derivative operators‚ and its three possible meanings—gradient‚ divergence‚ and curl—can be formally viewed as the product of scalars‚ dot product‚ and cross product‚ respectively‚ of the del "operator" with the field. A. GRADIENT If a scalar function ‚ ‚ is continuously differentiable with respect to its
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Typical applications include copiers and printers‚ packaging and labelling machinery‚ medical equipment‚ conveyors‚ document feeders and textile machinery. In a clutch when powers applied‚ a magnetic field is created in the coil . This field (flux) overcomes an
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9.2 Space Students learn to: Students: 1. The Earth has a gravitational field that exerts a force on objects both on it and around it define weight as the force on an object due to a gravitational field perform an investigation and gather information to determine a value for acceleration due to gravity using pendulum motion or computer-assisted technology and identify reason for possible variations from the value 9.8 ms-2 gather secondary information to predict the value of acceleration
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construction of one baseball field that will accommodate a semi-pro baseball team‚ the construction of one clubhouse‚ and the construction of one parking area sized to hold 50 cars. A 20-acre parcel of land will be provided for the construction of these facilities‚ which has already been acquired. The contractor shall be responsible for the demolishing‚ clearing‚ removal‚ and disposal of existing buildings and trees. The site shall be evenly graded to drain away from the playing field. The Contractor shall
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SUMMARY Magnetic levitation is the process of levitating an object by exploiting magnetic fields. If the magnetic force of attraction is used‚ it is known as magnetic suspension. If magnetic repulsion is used‚ it is known as magnetic levitation. In the past‚ magnetic levitation was attempted by using permanent magnets. Earnshaw’s theorem however‚ proves that this is mathematically impossible. There exists no arrangement of static magnets of charges that can stably levitate an object. There
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between two point charges‚ forces between multiple charges; superposition principle and continuous charge distribution. Electric field‚ electric field due to a point charge‚ electric field lines‚ electric dipole‚ electric field 89 due to a dipole‚ torque on a dipole in uniform electric fleld. Electric flux‚ statement of Gauss’s theorem and its applications to find field due to
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A.C current meters Introduction An ammeter is a measuring instrument used to measure the electric current in a circuit. Electric currents are measured in amperes (A)‚ hence the name. Neither type of basic dc PMMC meter movement will correctly indicate an alternating current. There are‚ however‚ four basic types of meter movement that will indicate ac values:- Thermocouple Hot wire Electrodynamometer Iron-vane Electrodynamic ammeters An electrodynamic meter uses an electromagnet instead
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plan if you would listen for a minute‚" Mr. Jacks said slowly. There was a moment of silence between the two. "Remember Jackson talking about the furniture store outside the force field‚" said Mr. Jacks. "I’m not sure where it is... but that’s the only chance if you want your friend on the other side of that force field". Kate glanced over to Mr. Jacks way once again. "Alright‚ we better hurry we don’t have much time before they start
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a) Derive an expression for the magnetic field B at a point of distance r‚ from an infinitely long wire that carries a current I. Your derivation should include the direction of the magnetic field with respect to the direction of current flow. Verify your expression by using the experimental results obtained. If your results do not show the expected relationship‚ explain why. In order to derive an expression for the magnetic field B at a point of distance r‚ from an infinitely long wire that carries
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Working When a current carrying conductor is placed in a magnetic field‚ it experiences a force and tends to move in the direction as per Fleming’s left hand rule. Fleming left hand rule: If the first and the second finger and the thumb of the left hand are held so that they are at right angle to each other‚ then the thumb shows the direction of the force on the conductor‚ the first finger points towards the direction of the magnetic field and the second finger shows the direction of the current in
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