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ICSE Class 10 Physics Solved Question Paper 2017

Short Answer Type

A brass ball is hanging from a stiff cotton thread. Draw a neat labelled diagram showing the forces acting on the brass ball and cotton thread.

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The distance between two bodies is doubled. How is the magnitude of the gravitational force between them affected?

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Why is a jack screw provided with a long arm?

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4.
If the power of a motor is 100 kW, at what speed can it raise a load of 50,000 N?

Given, power of the motor, P = 100 kW =100 × 1000 W = 10⁵ Watt
and force, F = 50000 N.

Now, from the definition of power,

$straight P space equals space Fv straight v space equals space straight P over straight F space equals space 100000 over 50000 space equals space 2 space ms to the power of negative 1 end exponent$

Hence, the motor can lift the load with a speed of 2 ms^-1.

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Which class of lever will always have MA > 1 and why?

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Define heat capacity and state its SI unit.

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Why is the base of a cooking pan generally made thick?

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A solid of mass 50 g at 150°C is placed in 100 g of water at 11°C, when the final temperature recorded is 20°C. Find the specific heat capacity of the solid. (specific heat capacity of water = 4.2 J/g°C)

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How is the refractive index of a material related to:
(i) real and apparent depth?
(ii) velocity of light in vacuum or air and the velocity of light in a given medium?

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