Physics-

#### The stress - strain graphs for materials A and B are as shown. Choose the correct alternative

Physics-General

- Young’s modulus of B is greater than that of A
- material A is stronger than material B
- Young’s modulus of A is greater than that of B
- material B is stronger than material A

#### Answer:The correct answer is: material B is stronger than material A

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### Related Questions to study

physics-

#### In the experiment to determine Young’s modulus of the material of a wire under tension used in the arrangement as shown. The percentage error in the measurement of length is ‘a’, in the measurement of the radius of the wire is ‘b’ and in the measurement of the change in length of the wire is ‘c’. Percentage error in the measurement of Young’s modulus for a given load is

#### In the experiment to determine Young’s modulus of the material of a wire under tension used in the arrangement as shown. The percentage error in the measurement of length is ‘a’, in the measurement of the radius of the wire is ‘b’ and in the measurement of the change in length of the wire is ‘c’. Percentage error in the measurement of Young’s modulus for a given load is

physics-General

physics-

#### The graph shows the change ' ' Dl in the length of a thin uniform wire used by the application of force ‘F’ at different temperatures T_{1} and T_{2} The variation suggests that

#### The graph shows the change ' ' Dl in the length of a thin uniform wire used by the application of force ‘F’ at different temperatures T_{1} and T_{2} The variation suggests that

physics-General

physics-

#### The load versus extension graph for four wires of same material is shown. The thinnest wire is represented by the line

#### The load versus extension graph for four wires of same material is shown. The thinnest wire is represented by the line

physics-General

maths-

#### The solution of the differential equation represent

#### The solution of the differential equation represent

maths-General

physics-

#### In the capacitor shown in the circuit is changed to 5 V and left in the circuit, in 12s the charge on the capacitor will become

Final charge on capacitor is

where = charge on capacitor at

=time constant of the circuit.

Putting

Given,

Hence,

where = charge on capacitor at

=time constant of the circuit.

Putting

Given,

Hence,

#### In the capacitor shown in the circuit is changed to 5 V and left in the circuit, in 12s the charge on the capacitor will become

physics-General

Final charge on capacitor is

where = charge on capacitor at

=time constant of the circuit.

Putting

Given,

Hence,

where = charge on capacitor at

=time constant of the circuit.

Putting

Given,

Hence,

physics-

#### In the given figure, a hollow spherical capacitor is shown. The electric field will not be zero at

The electric field of a hollow spherical capacitor is localised in between inner and outer surface of the spherical conductor.

Therefore, at point , the electric field will not be zero.

Therefore, at point , the electric field will not be zero.

#### In the given figure, a hollow spherical capacitor is shown. The electric field will not be zero at

physics-General

The electric field of a hollow spherical capacitor is localised in between inner and outer surface of the spherical conductor.

Therefore, at point , the electric field will not be zero.

Therefore, at point , the electric field will not be zero.

physics-

#### A 2 capacitor is charged as shown in the figure. The percentage of its stored energy dissipated after the switch is turned to positions 2 is

(say)

This charge will remain constant after switch is shifted from position 1 to position 2.

Energy dissipated80% of the initial stored energy .

This charge will remain constant after switch is shifted from position 1 to position 2.

Energy dissipated80% of the initial stored energy .

#### A 2 capacitor is charged as shown in the figure. The percentage of its stored energy dissipated after the switch is turned to positions 2 is

physics-General

(say)

This charge will remain constant after switch is shifted from position 1 to position 2.

Energy dissipated80% of the initial stored energy .

This charge will remain constant after switch is shifted from position 1 to position 2.

Energy dissipated80% of the initial stored energy .

physics-

#### What is the potential difference between points in the circuit shown?

Consider the charge distribution as shown. Considering the branch on upper side, we have

Here,

…(i)

…(ii)

From Eqs. (i) and (ii), we get

Similarly for the lower side branch

…(iii)

...(iv)

From Eqs. (iii) and (iv)

Here,

…(i)

…(ii)

From Eqs. (i) and (ii), we get

Similarly for the lower side branch

…(iii)

...(iv)

From Eqs. (iii) and (iv)

#### What is the potential difference between points in the circuit shown?

physics-General

Consider the charge distribution as shown. Considering the branch on upper side, we have

Here,

…(i)

…(ii)

From Eqs. (i) and (ii), we get

Similarly for the lower side branch

…(iii)

...(iv)

From Eqs. (iii) and (iv)

Here,

…(i)

…(ii)

From Eqs. (i) and (ii), we get

Similarly for the lower side branch

…(iii)

...(iv)

From Eqs. (iii) and (iv)

maths-

#### If m and n are order and degree of the equatio then

#### If m and n are order and degree of the equatio then

maths-General

maths-

#### Solution of differential equation is

#### Solution of differential equation is

maths-General

physics-

#### What is the potential difference across 2F capacitor in the circuit shown?

Net emf in the circuit here

volt

While the equivalent capacity

Charge on each capacitor

Potential difference across capacitor

#### What is the potential difference across 2F capacitor in the circuit shown?

physics-General

Net emf in the circuit here

volt

While the equivalent capacity

Charge on each capacitor

Potential difference across capacitor

physics-

#### Two insulating plates are both uniformly charged in such a way that the potential difference between them is V. (, plate 2 is at a higher potential). The plates are separated by m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2? (e=1.6

Since so electric field will point from plate 2 to plate 1.

The electron will experience an electric force, opposite to the direction of electric field, and hence move towards the plate 2.

Use work-energy theorem to find speed of electron when it strikes the plate 2.

Where is the required speed.

The electron will experience an electric force, opposite to the direction of electric field, and hence move towards the plate 2.

Use work-energy theorem to find speed of electron when it strikes the plate 2.

Where is the required speed.

#### Two insulating plates are both uniformly charged in such a way that the potential difference between them is V. (, plate 2 is at a higher potential). The plates are separated by m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2? (e=1.6

physics-General

Since so electric field will point from plate 2 to plate 1.

The electron will experience an electric force, opposite to the direction of electric field, and hence move towards the plate 2.

Use work-energy theorem to find speed of electron when it strikes the plate 2.

Where is the required speed.

The electron will experience an electric force, opposite to the direction of electric field, and hence move towards the plate 2.

Use work-energy theorem to find speed of electron when it strikes the plate 2.

Where is the required speed.

physics-

#### In given circuit when switch has been closed then charge on capacitor and respectively are

The circuit is given as

Let be the charge after switch has been closed.

Then,

…(i)

But we know that, charge is conserved

or …(ii)

On putting the value of Eq. (ii)

Now, from Eq. (i)

Hence,

Let be the charge after switch has been closed.

Then,

…(i)

But we know that, charge is conserved

or …(ii)

On putting the value of Eq. (ii)

Now, from Eq. (i)

Hence,

#### In given circuit when switch has been closed then charge on capacitor and respectively are

physics-General

The circuit is given as

Let be the charge after switch has been closed.

Then,

…(i)

But we know that, charge is conserved

or …(ii)

On putting the value of Eq. (ii)

Now, from Eq. (i)

Hence,

Let be the charge after switch has been closed.

Then,

…(i)

But we know that, charge is conserved

or …(ii)

On putting the value of Eq. (ii)

Now, from Eq. (i)

Hence,

physics-

#### Calculate the force ' ' F that is applied horizontally at the axle of the wheel which is necessary to raise the wheel over the obstacle of height 4m. Radius of the wheel is 1m and its mass is

applying principle of moments

F (0.6)=100(0.8)

ÞF=133.3N

F (0.6)=100(0.8)

ÞF=133.3N

#### Calculate the force ' ' F that is applied horizontally at the axle of the wheel which is necessary to raise the wheel over the obstacle of height 4m. Radius of the wheel is 1m and its mass is

physics-General

applying principle of moments

F (0.6)=100(0.8)

ÞF=133.3N

F (0.6)=100(0.8)

ÞF=133.3N

physics-

#### A wheel of radius ‘r’ and mass ‘m’ stands in front of a step of height 'h’ The least horizontal force which should be applied to the axle of the wheel to allow it to raise onto the step is

Applying the condition of rotational equilibrium,

But

But

#### A wheel of radius ‘r’ and mass ‘m’ stands in front of a step of height 'h’ The least horizontal force which should be applied to the axle of the wheel to allow it to raise onto the step is

physics-General

Applying the condition of rotational equilibrium,

But

But