EASY
11th West Bengal Board
IMPORTANT
Earn 100

Read the statement below carefully and state, with reason, if it is true or false :

The stretching of a coil is determined by its shearing modulus.

50% studentsanswered this correctly

Important Questions on Elasticity

EASY
11th West Bengal Board
IMPORTANT
Read each statement below carefully and state, with reason, if it is true or false :

When a material is under tensile stress, the restoring forces are caused by interatomic attraction. While under compressional stress the restoring force is due to interatomic repulsion.

EASY
11th West Bengal Board
IMPORTANT
Read the statement below carefully and state, with reason, if it is true or false :

A piece of rubber under an ordinary stress can display 100% strain ; yet when unloaded it returns to its original length. This shows that the restoring forces in a rubber piece are strictly conservative.

EASY
11th West Bengal Board
IMPORTANT
Read each statement below carefully and state, with reason, if it is true or false :

Elastic forces are strictly conservative when Hooke's law is obeyed.

HARD
11th West Bengal Board
IMPORTANT
Define logitudinal, volume and shearing strains. Define stress. Distinguish between normal and shearing stress.
HARD
11th West Bengal Board
IMPORTANT
State Hooke' law. Define Young's modulus, Bulk modulus and modulus rigidity of a material. Are these three independent of each other.
HARD
11th West Bengal Board
IMPORTANT
Show that a shearing strain produced in a rectangular body is equivalent to two equal longitudinal strains, one of extension and the other of compression, at the right angle to each other. Find their values.
MEDIUM
11th West Bengal Board
IMPORTANT
Explain why a soild material has all the three elastic modulii, but liquids and gases have only bulk modulus.
MEDIUM
11th West Bengal Board
IMPORTANT
Define Poisson's ratio. Is it an elastic modulus ?