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In a transformer the ratio of primary to secondary is 1:10. A current of 200mA flow through a 200 ohm resistor in the secondary circuit. Assuming that the transformer is 100% efficient, determine:
a. The secondary voltage.
b. The primary voltage.
c. The primary current.
Date posted:
December 4, 2017
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Electric power is transmitted over long distance at high voltage. Explain.
Date posted:
December 4, 2017
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Explain how the energy losses are reduced in a transform by having :
a. A soft iron core
b. A laminated core
Date posted:
December 4, 2017
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State the five terms of the semi empirical mass formula.
Date posted:
November 30, 2017
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What is a transistor?
Date posted:
November 30, 2017
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State the two purposes of the iron core in AC transformer.
Date posted:
November 30, 2017
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This is under Atomic Physics
Date posted:
November 29, 2017
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This is under solid state Physics.
Date posted:
November 29, 2017
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List five applications of friction
Date posted:
November 27, 2017
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What is friction?
Date posted:
November 27, 2017
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State the law of conservation of linear momentum
Date posted:
November 27, 2017
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State Newton’s third law (law of interaction)
Date posted:
November 27, 2017
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What is dispersion of white light?
Date posted:
November 27, 2017
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Explain the effects of total internal reflection.
Date posted:
November 27, 2017
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Explain what total internal reflection is.
Date posted:
November 27, 2017
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State the law of reversibility.
Date posted:
November 27, 2017
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State two factors which affect frictional force of a body
Date posted:
November 27, 2017
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Why are sound waves grouped under mechanical waves?
Date posted:
November 25, 2017
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Give examples of waves that fall under electromagnetic waves.
Date posted:
November 25, 2017
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Define the term Brownian motion
Date posted:
November 25, 2017
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Explain why a plane mirror forms images while a white paper does not, yet both reflect light.
Date posted:
November 25, 2017
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State the conditions for interference of light to occur.
Date posted:
November 24, 2017
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Harmonic motions are of two types. Name them.
Date posted:
November 24, 2017
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State three properties of Kets and Bras.
Date posted:
November 24, 2017
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State five applications of Schrodinger Equation.
Date posted:
November 24, 2017
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State three differences between Quantum Mechanics and Classical Mechanics
Date posted:
November 24, 2017
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State two ways of varying the size of the image formed in a pinhole camera.
Date posted:
November 24, 2017
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State one similarity of images formed by a convex mirror and a plane mirror
Date posted:
November 24, 2017
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State the advantages of using mercury as a liquid in glass thermometer.
Date posted:
November 24, 2017
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Explain why water wets glass tubes.
Date posted:
November 24, 2017