Physical quantities, measurement & deformation of solids MCQ

Front

What is a physical quantity?

Back

A physical quantity is a property of a physical system that can be quantified, such as length, mass, time, and temperature.

Front

Define measurement in the context of physics.

Back

Measurement is the process of obtaining the magnitude of a physical quantity relative to a standard unit.

Front

What is deformation in solids?

Back

Deformation is the change in shape or size of a solid object due to applied forces or moments.

Front

Explain the difference between elastic and plastic deformation.

Back

Elastic deformation is reversible and occurs when the material returns to its original shape after the force is removed. Plastic deformation is permanent and occurs when the material does not return to its original shape.

Front

What is stress in materials science?

Back

Stress is the force applied per unit area within materials, typically measured in Pascals (Pa).

Front

Define strain in the context of solid mechanics.

Back

Strain is the measure of deformation representing the displacement between particles in a material, defined as the change in length divided by the original length.

Front

What is Hooke's Law?

Back

Hooke's Law states that the strain in a solid is proportional to the applied stress, within the elastic limit of that material.

Front

What is Young's modulus?

Back

Young's modulus is a measure of the stiffness of a solid material, defined as the ratio of stress to strain.

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force in SI is the Newton (N).

Front

Explain the concept of tensile strength.

Back

Tensile strength is the maximum amount of tensile (stretching) stress that a material can withstand before failure.