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A single-phase transformer has a voltage ratio of 6:1 and the h.v.winding is supplied at 540V.
The secondary winding gives a full load current of 30A at a power factor of 0.8 lagging. Neglecting losses,
Find
(a) The rating of the transformer,
(b) The power supplied to the load,
(c) The primary current
(1) These rays transmitted in the forward direction of medium with a finite speed. (2) Energy and momentum are transmitted in the direction of propagation of waves without real
If the resultant force acting on a body of constant mass is zero, the body's momentum is: a) Increasing b) Decreasing b) Always zero d) Constant Ans: If
A zinc plate is attached to the knob of a negatively charged electroscope. What will occur to the leaves of the electroscope when ultraviolet light is shown on the zinc plate
a car tyre is pumped up to 230 kPa. What is the volume of air at atmospheric pressure (100kPa) that must be pumped into a tyre that has a volume of 0.1 cubic meter?
A source producing sound at frequency 400 Hz is moving along the Y axis with a speed of 22 metre per second. A listener is situated at position (660m,0). Find the frequency of the
Explain quasi-static process The process in the system the variables (PTV) alters very slowly so that the systems remain in thermal and mechanical equilibrium with its surround
a yellow lamp emits light with a wavelength of 6.00E-7 meters. Calculate the frequency of the yellow light.
Explain the Kinetic Theory Kinetic theory looks at how each of these steps adds more internal kinetic energy (jiggle energy) to the material. A solid is a framework of atoms an
What do you mean by Doppler effect? Derive a mathematical expression for the apparent frequency of a note, when source of sound and observer are approaching each other.
Air dielectric capacitors are used mainly as laboratory standards of capacitance for measurement purposes. The insulating material used in these capacitances is fused silica and th
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