Recent content by islandguy

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    Calculating Induced e.m.f and Power in a Perpendicular Coil

    shouldnt be the formula: E = -N *(dф)/(dt) ? ur right about the magnetic fiels it should be to the power of -5, sorry for that mistake
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    Alternating Current 6: Period, Load Resistance, RMS & Peak Power

    6. A pure alternating current is produced by an alternator in which a coil rotates in a uniform magnetic field. The output voltage from the alternator can be described by V=12sin100t. a) What is the period of the alternating voltage produced? [ marks] b) The output from the alternator is...
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    Calculating Induced e.m.f and Power in a Perpendicular Coil

    a) State Faraday’s law of electromagnetic induction. [ mark b) A coil of 1000 turns, resistance 23.0 ohms and cross-sectional area of 4.0 cm squared is positioned perpendicular to a magnetic field which is switched off in 0.005 s. I) What is the average induced e.m.f. if the magnetic flux...
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    A leaky 100 microfarad capacitor is charged to a potental difference

    A leaky 100 microfarad capacitor is cahrged to a potental difference of 50V. IT leaks as though a Kilo ohm is connected across it. a) Find the initial discharge current. b) If a child can feel an electric shock when the voltage of a source is higherthan 20 V. after what time can the...
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    Distinguish between p and n-type semiconductors?

    how can i use the hall effect to destinguish between p and n-type semiconductors? i thank u in advance kris
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    Minimal Interference from Buildings and Houses on Broadcast Reception

    Expalin why obsatcles, such as buildings and houses, do not interfer much with the reception of broadcasts. can some one help with this pls 10x in advance
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