A step up transformer does not violate the law of conservation of energy. Although it enhancesthe output voltage but correspondingly reduces, the circuit current so that power output of even an ideal transformer is same as the power input. Class ...
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
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We know that a capacitor does not allow of direct current through it because the gap between the two plates of capacitor offers an infinite resistance. when an alternating voltage is applied across a capacitor, the capacitor plates are alternately ...
Use of a.c. voltage is preferred over d.c. voltage on account of the following reasons: (i) An a.c generator is easy to operate and maintain. So we prefer to use a.c. voltage. (ii) Using a Transformer voltage of a.c supply ...
A material suitablefor making core of a transformer should have (i) a narrow hysteresis curve so as to minimise energy dissipation during each magnetisation cycle and (ii) a high resistivity to lower eddy current losses. Class 12 Physics Chapter 7 ...
Energy loss due to eddy currents and hysteresis loss. Class 12 Physics Chapter 7 Alternating current Session 2024-2025.