Answer:
The Sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us.
In a direct current, the electric charge, or current, only flows in one direction. In an alternating current, the electric charge changes periodically.
The answer is C
All other statements are correct but C
Explanation:
Velocity ratio of simple machine is the ratio of distance travelled by effort to the distance travelled by load in the machine. The efficiency of a simple machine is defined as the ratio of useful work done by machine (output work) to the total work put into the machine (input work).
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