The centre of the reflecting surface of a spherical mirror is a point called the ___.
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AC is converted into DC by a
If the distance travelled by an object is zero, then the displacement of the object
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Kakori train robbery was organized by the ___ in 1925.
A landscape which is caused due to the fissure in the earth along which one side has moved down with reference to the other is known as
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The Law of Demand is based on the concept that people _______.