Physics-
General
Easy
Question
If the shear modulus of a wire material is 5.9
then the potential energy of a wire of 
in diameter and 5 cm long twisted through an angle of 10’ , is
The correct answer is:
To twist the wire through the angle 
it is necessary to do the work
And 
Book A Free Demo
+91 
Grade*
Select Grade
Related Questions to study
physics-
The Young’s modulus of the material of a wire is equal to the
Young’s modulus of material 
If longitudinal strain is equal unity, then
Linear stress produced
If longitudinal strain is equal unity, then
Linear stress producedThe Young’s modulus of the material of a wire is equal to the
physics-General
Young’s modulus of material
If longitudinal strain is equal unity, then
Linear stress produced
If longitudinal strain is equal unity, then
Linear stress producedMaths-
Maths-General
physics-
Two short bar magnets of equal dipole moment M are fastened perpendicularly at their centers, figure. The magnitude of resultant of two magnetic field at a distance 
from the center on the bisector of the right angle is
Resolving the magnetic moments along 
and perpendicular to
figure we find that component perpendicular cancel out. Resultant magnetic moment along 
The point
lies on axial line of magnet of moment
and perpendicular to figure we find that component perpendicular cancel out. Resultant magnetic moment along The point
lies on axial line of magnet of momentTwo short bar magnets of equal dipole moment M are fastened perpendicularly at their centers, figure. The magnitude of resultant of two magnetic field at a distance from the center on the bisector of the right angle is
physics-General
Resolving the magnetic moments along and perpendicular to figure we find that component perpendicular cancel out. Resultant magnetic moment along
The point lies on axial line of magnet of moment
and perpendicular to figure we find that component perpendicular cancel out. Resultant magnetic moment along The point
lies on axial line of magnet of momentphysics-
Two magnets of equal mass are joined at 90
each other as shown in figure. Magnet 
has a magnetic moment 
times that of 
. The arrangement is pivoted so that it is free to rotate in horizontal plane. When in equilibrium, what angle should make with magnetic meridian?
In equilibrium, the resultant magnetic moment will be along magnetic meridian. Let make 
with resultant
make with resultantTwo magnets of equal mass are joined at 90 each other as shown in figure. Magnet has a magnetic moment times that of . The arrangement is pivoted so that it is free to rotate in horizontal plane. When in equilibrium, what angle should make with magnetic meridian?
physics-General
In equilibrium, the resultant magnetic moment will be along magnetic meridian. Let make with resultant
make with resultantphysics-
The pressure applied from all directions on a cube is . How much its temperature should be raised to maintain the original volume? The volume elasticity of the cube is 
and the coefficient of volume expansion is 
If coefficient of volume expansion is and rise in temperature is 
then 
Volume elasticity
and rise in temperature is then Volume elasticity
The pressure applied from all directions on a cube is . How much its temperature should be raised to maintain the original volume? The volume elasticity of the cube is and the coefficient of volume expansion is
physics-General
If coefficient of volume expansion is and rise in temperature is then
Volume elasticity
and rise in temperature is then Volume elasticity
physics-
A wire 
has length 1 m and cross-sectional area 1 
The work required to increase the length by 2 mm is
Work done = 
= 4
= 4
A wire has length 1 m and cross-sectional area 1 The work required to increase the length by 2 mm is
physics-General
Work done =
= 4
= 4
physics-
The diagram shows a force-extension graph for a rubber band. Consider the following statements
I. It will be easier to compress this rubber than expand it
II. Rubber does not return to its original length after it is stretched
III. The rubber band will get heated if it is stretched and released
Which of these can be deduced from the graph
Area of hysterisis loop gives the energy loss in the process of stretching and unstretching of rubber band and this loss will appear in the form of heating
The diagram shows a force-extension graph for a rubber band. Consider the following statements
I. It will be easier to compress this rubber than expand it
II. Rubber does not return to its original length after it is stretched
III. The rubber band will get heated if it is stretched and released
Which of these can be deduced from the graph
physics-General
Area of hysterisis loop gives the energy loss in the process of stretching and unstretching of rubber band and this loss will appear in the form of heating
physics-
A wire of length Land radius 
rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is 
If another wire of same material but of length 2L and radius 
is stretched with a force 2F, the increase in its length will be
Young’s modulus 
Since for same material Young’s modulus is same,
or
or
Since for same material Young’s modulus is same,
or
or
A wire of length Land radius rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is If another wire of same material but of length 2L and radius is stretched with a force 2F, the increase in its length will be
physics-General
Young’s modulus
Since for same material Young’s modulus is same,
or
or
Since for same material Young’s modulus is same,
or
or
physics-
The variation of intensity of magnetization 
with respect to the magnetizing field (H) in a diamagnetic substance is described by the graph in figure.
For a dia-magnetic substance, 
is negative and 
Therefore, the variation is represented by 
. As magnetisation is small, 
is better choice.
is negative and Therefore, the variation is represented by . As magnetisation is small, is better choice.The variation of intensity of magnetization with respect to the magnetizing field (H) in a diamagnetic substance is described by the graph in figure.
physics-General
For a dia-magnetic substance, is negative and Therefore, the variation is represented by . As magnetisation is small, is better choice.
is negative and Therefore, the variation is represented by . As magnetisation is small, is better choice.Maths-
The number of one one onto functions that can be defined from A={a,b,c,d} into B={1,2,3,4} is
The number of one one onto functions that can be defined from A={a,b,c,d} into B={1,2,3,4} is
Maths-General
maths-
The number of ways one can arrange words with the letters of the word ’ so that ↑MADHURI↑ always vowels occupy the beginning, middle and end places is
3 vowels, 3 places 
! remaining 
!
Total! 4!
! remaining !Total
! 4!The number of ways one can arrange words with the letters of the word ’ so that ↑MADHURI↑ always vowels occupy the beginning, middle and end places is
maths-General
3 vowels, 3 places ! remaining !
Total! 4!
! remaining !Total
! 4!Maths-
If 
defined by 
If defined by
Maths-General
physics
An ant goes from P to Q on a circular path in 20 second Radius OP=10 m . What is the average speed and average velocity of it ?
An ant goes from P to Q on a circular path in 20 second Radius OP=10 m . What is the average speed and average velocity of it ?
physicsGeneral
Maths-
Which of the following functions is not injective?
Which of the following functions is not injective?
Maths-General
physics
The graph of position 
time shown in the figure for a particle is not possible because ....
The graph of position time shown in the figure for a particle is not possible because ....
physicsGeneral