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Figure shows the magnetic circuit of a relay.
When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps.
Use the B-H curves
Voltages relative to earth It is very common in electrical circuits to have an earth connection. This earth connection has no effect on potential differences across components
Ngan has a weight of 314.5 N on Mars and a weight of 833.0 N on Earth. a. What is Ngan's mass on Mars? b. What is the acceleration due to gravity on Mars, g Mars ?
Malus' law (E.L. Malus): The light intensity I of a ray along initial intensity I0 travelling by a polarizer at an angle theta among the polarization of the light ray & the po
Temperature joule; J (after J.P. Joule, 1818-1889) The derived SI unit of energy described as the amount of work done by moving an object by a distance of 1 m by applying a fo
If you "bow" a string on a violin you hear a note with a frequency of 1020 Hz. If the length of the string is about 40cm, what is the "wave" on the string? Draw a diagram to show
An electric motor with a load delivers 5.2 hp to its shaft (1 hp = 746 W). Under these conditions, it operates at 82.8 percent efficiency. a. How much current does the motor d
"At base temperature the volume of a gas differs inversely with pressure". If P and V are volume and pressure of a gas at a given temperature then
practical applications of vectors in everyday life
Falling bodies If you can search a building that is about 20 m high in your locality you can examine how gravity makes bodies fall faster the longer it acts on them. Get a piec
A 105-N suitcase sits on a rubber ramp at an airport carousel at a 25° angle. The weight vector can be broken into two perpendicular components. a. What is the magnitude of the
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