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1. Difference between induction and friction: Friction – the transfer of electrons from one object to the other. Conduction – by having two objects TOUCH each other and transfer electrons from one object to the next. Induction – By inducing electrons to move from one object to the other.
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2. Curved surfaces are called spherical mirrors only when they are, in fact, mirrors and their surface shape is a portion of a sphere.
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3. a) Concave mirror:
Astronomical telescopes.
Headlights.
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b) Convex mirror:
Magnifying glasses.
For security purposes.
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c) Plane mirror:
They are used as looking glass.
They are used in solar cookers.
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