Physics-

General

Easy

Question

# A current of 10 A is passing through a long wire which has semicircular loop of the radius 20 cm as shown in the figure. Magnetic field produced at the centre of the loop is

- tesla
- tesla
- tesla
- tesla

## The correct answer is: tesla

### Related Questions to study

physics-

### In the figure shown, the magnetic field induction at the point will be

Field due to a straight wire of infinite length is if the point is on a line perpendicular to its length while at the centre of a semicircular coil is .

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out of the page

### In the figure shown, the magnetic field induction at the point will be

physics-General

Field due to a straight wire of infinite length is if the point is on a line perpendicular to its length while at the centre of a semicircular coil is .

out of the page

out of the page

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### PQ and RS are long parallel conductors separated by certain distance. M is the mid-point between them (see the figure). The net magnetic field at M is B. Now, the current 2A is switched off. The field at M now becomes

Magnetic field at mid-point in first case is

When the current 2 A is switched off, the net magnetic field at is due to current 1 A

When the current 2 A is switched off, the net magnetic field at is due to current 1 A

### PQ and RS are long parallel conductors separated by certain distance. M is the mid-point between them (see the figure). The net magnetic field at M is B. Now, the current 2A is switched off. The field at M now becomes

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Magnetic field at mid-point in first case is

When the current 2 A is switched off, the net magnetic field at is due to current 1 A

When the current 2 A is switched off, the net magnetic field at is due to current 1 A

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### Current through ABC and A’ B’ C’ is I. What is the magnetic field at P? (Here C’ B’ PBC are collinear)

Magnetic field

### Current through ABC and A’ B’ C’ is I. What is the magnetic field at P? (Here C’ B’ PBC are collinear)

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Magnetic field

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

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

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### 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

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### 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

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Increase in length of one segment of wire

So,

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### 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 =

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### 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

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Net elongation of the rod is

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### 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

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### 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

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

And

And

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### 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

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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

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### 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