SECTION -
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Q1
Fill in the blanks:
0 This is the
on which the shadow is formed.
(ii) Image formed by a pinhole camera is
Temporary magnets are usually made up of
(iv)
A magnet has
poles.
In a magnet
have the maximum attractive property.
(vi) The mechanical advantage of class lever is always less than one.
(vil) The useful work done by an actual machine is always than the work
done on the machine.
(viii) In class II levers, the load is in between fulcrum and
True or false :
(i) Artificial magnets are weaker than the natural magnets.
() Poles of a magnet can not be separated
A magnet can attract metal.
(iv)
A boy does work by pushing a wall.
(v) All levers are force multipliers.
An inclined plane always has the mechanical advantage more than one.
(vi)
(vil) A machine performs work by itself.
(viii) A pulley changes the direction of force.
Answers
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Answer:
Don't know....sorry
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