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what you mean by Alternating current ?
Asked by Durgadevi Last Modified
Answer 
In electricity, alternating current (AC) occurs when charge carriers in a conductor or semiconductorperiodically reverse their direction of movement. Household utility current in most countries is AC with a frequencyof 60 hertz (60 complete cycles per second), although in some countries it is 50 Hz. The radio-frequency (RF) current in antennas and transmission lines is another example of AC.
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In electricity, alternating current (AC) occurs when charge carriers in a conductor or semiconductorperiodically reverse their direction of movement. Household utility current in most countries is AC with a frequencyof 60 hertz (60 complete cycles per second), although in some countries it is 50 Hz. The radio-frequency (RF) current in antennas and transmission lines is another example of AC.
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A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
(i) t1/2 (ii) t (iii) t3/2 (iv) t2
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