Home
Class 10
PHYSICS
A circular disc of copper has a symmetri...

A circular disc of copper has a symmetrical hole at its centre. The disc is uniformly heated. The diameter of the hole will

A

increase

B

decrease

C

remain the same

D

become indeterminate

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of how the diameter of a symmetrical hole in a circular disc of copper changes when the disc is uniformly heated, we can follow these steps: ### Step 1: Understand Thermal Expansion When a material is heated, it undergoes thermal expansion. This means that the material expands in all directions. For solids, this expansion occurs due to the increased vibration of atoms as they gain energy from heat. ### Step 2: Consider the Structure of the Disc The disc is made of copper and has a symmetrical hole at its center. When the disc is heated uniformly, every part of the disc, including the material surrounding the hole, expands. ### Step 3: Analyze the Effect on the Hole As the disc expands, the material around the hole moves outward. Since the hole is part of the disc, the expansion of the surrounding material will also affect the hole itself. ### Step 4: Conclude the Effect on the Diameter of the Hole As the disc expands uniformly, the diameter of the hole will also increase. This is because the hole is not a solid object; it is an absence of material that is surrounded by the expanding material of the disc. Therefore, as the disc expands, the hole expands as well. ### Final Answer The diameter of the hole will **increase** when the disc is uniformly heated. ---
To solve the problem of how the diameter of a symmetrical hole in a circular disc of copper changes when the disc is uniformly heated, we can follow these steps: ### Step 1: Understand Thermal Expansion When a material is heated, it undergoes thermal expansion. This means that the material expands in all directions. For solids, this expansion occurs due to the increased vibration of atoms as they gain energy from heat. ### Step 2: Consider the Structure of the Disc The disc is made of copper and has a symmetrical hole at its center. When the disc is heated uniformly, every part of the disc, including the material surrounding the hole, expands. ...
Promotional Banner

Topper's Solved these Questions

  • HEAT

    MCGROW HILL PUBLICATION|Exercise HIGHER ORDER THINKING QUESTIONS|15 Videos

  • GRAVITATION

    MCGROW HILL PUBLICATION|Exercise HIGHER ORDER THINKING QUESTIONS|25 Videos

  • HEATING AND MAGNETIC EFFECTS OF CURRENT

    MCGROW HILL PUBLICATION|Exercise HIGHER ORDER THINKING QUESTIONS|34 Videos

Similar Questions

Explore conceptually related problems

A metal disc has a hole in it. When the disc is heated, the size of the hole _________

On the flat surface of a disc of radius a a small circular hole of radius b is made with its centre at a distance c from the centre of the disc. If mass of the whole un cut disc is M, calculate the moment of inertia of the holed disc about the axis of the circular hole. [(1)/(2)[a^(2) + 2c^(2)- (b^(4))/(a^(2))]]

A circular disc of radius b has a hole of radius a at its centre (see figure). If the mass per unit area of the disc varies as ((sigma_(0))/(r)) . then the radius of gyration of the disc about its axis passing through the centre is:

From a uniform circular disc of diameter D, a circular disc or hole of diameter D//6 and having its centre at a distance of D//4 from the centre of the disc is scopped out. Determine the centre of mass of the remaining portion.

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumference of the disc coincide. the centre of the mass of the new disc from the centre of bigger disc is is