Physics

General

Easy

### Question

#### The ratio of pathlength and the respective time interval is

- Mean velocity
- Mean speed
- instantaneous velocity
- instantaneous speed

#### The correct answer is: Mean speed

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### Related Questions to study

physics

#### A particle is thrown in upward direction with initial velocity of 60 m/s. Find average speed and average velocity after 10 seconds. [g =10 MS^{2}]

#### A particle is thrown in upward direction with initial velocity of 60 m/s. Find average speed and average velocity after 10 seconds. [g =10 MS^{2}]

physicsGeneral

physics-

#### The work done in deforming body is given by

Let

Force necessary to deform the body is

If body is deformed by a distance, then

Hence, work done for unit volume is

*L*be length of body,*A*the area of cross-section and the increase in length.Force necessary to deform the body is

If body is deformed by a distance, then

Hence, work done for unit volume is

#### The work done in deforming body is given by

physics-General

Let

Force necessary to deform the body is

If body is deformed by a distance, then

Hence, work done for unit volume is

*L*be length of body,*A*the area of cross-section and the increase in length.Force necessary to deform the body is

If body is deformed by a distance, then

Hence, work done for unit volume is

physics-

#### A wire of length and radius is stretched between and without the application of any tension. If is the Young’s modulus of the wire and it is stretched like , then the tension in the wire will be

Increase in length of one segment of wire

So,

#### A wire of length and radius is stretched between and without the application of any tension. If is the Young’s modulus of the wire and it is stretched like , then the tension in the wire will be

physics-General

Increase in length of one segment of wire

So,

physics-

#### A cube of aluminium of sides 0.1 m is subjected to a sharing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be

Shearing strain =

#### A cube of aluminium of sides 0.1 m is subjected to a sharing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be

physics-General

Shearing strain =

physics-

#### A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

Net elongation of the rod is

#### A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is

physics-General

Net elongation of the rod is

physics-

#### The graph shows the behaviour of a length of wire in the region for which the substance obeys Hooke’s law. and represent

Graph between applied force and extension will be straight line because in elastic range

Applied force extension

But the graph between extension and stored elastic energy will be parabolic in nature

As or

Applied force extension

But the graph between extension and stored elastic energy will be parabolic in nature

As or

#### The graph shows the behaviour of a length of wire in the region for which the substance obeys Hooke’s law. and represent

physics-General

Graph between applied force and extension will be straight line because in elastic range

Applied force extension

But the graph between extension and stored elastic energy will be parabolic in nature

As or

Applied force extension

But the graph between extension and stored elastic energy will be parabolic in nature

As or

physics-

#### 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

To twist the wire through the angle it is necessary to do the work

And

And

#### 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

physics-General

To twist the wire through the angle it is necessary to do the work

And

And

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 produced

#### The 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 produced

Maths-

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

The point lies on axial line of magnet of moment

#### 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

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

The point lies on axial line of magnet of moment

physics-

#### 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

#### 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?

physics-General

In equilibrium, the resultant magnetic moment will be along magnetic meridian. Let make with resultant

physics-

#### 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

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

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