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A step-up transformer works on 220V and gives 2A to an external resistor. The turn ratio between the secondary and primary coils is 2 : 25. Assuming 100% efficiency, Determine the Primary current, secondary voltage and power delivered.
Imagine a small observer is positioned in front of the cork in your picture above. As the cork approaches, the observer measures the wavelength of the waves passing by. How does th
What is waveguide dispersion in optical fibres? Waveguide dispersion (Δτ w ): Waveguide dispersion occurs because of the dependence onto the velocity of propagation of every
Electromagnetic waves are transverse waves; that means magnetic vector and electric vector, propagation vector are perpendicular to each other. Prove the statement mathematically.
The dielectric strength of transformer oil should be (A) 100 V. (B) 5 KV. (C) 30 KV. (D) 132 KV. Ans: The dielectric strength of transformer oil mu
DUE TO SURFACE TENSION WATER MOLECULES TEND TO HAVE MINIMUM SURFACE AREA AND SPHERE HAS THE MINIMUM SURFACE AREA FOR A GIVEN VOLUME AND THEREFORE BUBBLES ARE IN SPHERICAL SHAPE ONL
A hiker tosses a rock into a canyon. He hears it strike water 4.78 s later. How far down is the surface of the water?
A baton twirler throws a spinning baton directly upward. As it goes up and returns to the twirler's hand, the baton turns through four revolutions. Ignoring air resistance and assu
Wires A as well as wire B are both made out of copper. Wire B is double as long as wire A. The diameter of wire B is doubles that of wire A. Answer: Resistivity is a charac
A CAR MOVING AT 25m/s ALONG A STRAIGHT LEVEL ROAD EXPERIENCE A RESISTANCE WHICH PRODUCES A RETARDATION OF 0.0001 V^3,WHERE V IS THE VELOCITY IN m/s.FIND THE DISTANCE TRAVELLED AND
A hollow METALLIC sphere has an inner radius A and an outer radius B. If charge is placed on the inner surface, that is at radius A, where is the charge located after it has c
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