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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.
Voltmeters: Voltmeters are used to measure emf's and more commonly potential differences. The two probes of the meter are therefore connected to the two points between which th
what do you mean by banking of roads?why is it done?a train has to negotiate a curve of radius 400m.by how must the outer rail is raised as compared with the inner rail for a speed
Explain the principle of particle detection. Draw log n -V graph showing different regions and discuss the significant physical processes taking place in these regions.
What will be effect on Newton's rings if: (a) A little oil (μ=1.65) is introduced between the lens (μ=1.5) and the glass plate (μ=1.75) (b) A plane mirror is placed instead o
Measurement of length: If the Zeroth division of the head scale does not coincide with the index line the Screw gauge has Zero error. If the Zeroth division of the head Sca
Q. A capacitor blocks d.c. but allows a.c. Why? Capacitive reactance XC = 1/ω C = 1 / 2πν C Where ν is the frequency of the a.c. supply. In a d.c. circuit
A tank is filled up to a height 2H WITH A LIQUID and is placed on a platform of height H from the ground .the distance x from the ground where a small hole is punched to get maximu
A pure semiconductor under ordinary conditions behaves like (A) A conductor. (B) An insulator. (C) A magnetic material. (D) A ferro-electric material. A
Q. What is ionisation potential energy? For hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit (n=∞) is 13.6-0 = 13.6eV. This ene
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 l
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