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A wire is bent in the form of a circular arc with a straight portion AB. If the current in the wire is i, then the magnetic induction at O is
The correct answer is:
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The magnetic induction at O due to a current in conductor shaped as shown in fig. is
The magnetic induction at O due to a current in conductor shaped as shown in fig. is
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The figure shows a uniform conducting structure which carries current i with each small square has side a. The structure is kept in a uniform magnetic field B. Then the magnetic force on the structure will be
The figure shows a uniform conducting structure which carries current i with each small square has side a. The structure is kept in a uniform magnetic field B. Then the magnetic force on the structure will be
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Two long parallel conductors carry currents 
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Two long parallel conductors carry currents = 3A and = 3A both are directed into the plane of paper. The magnitude of resultant magnetic field at point ‘P; is
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A wire bent in the form a right angled triangle PQR, carries a current 1 A. It is placed in a region of a uniform magnetic field B= 0.2T. If PR = 1m, the net force on the wire is
A wire bent in the form a right angled triangle PQR, carries a current 1 A. It is placed in a region of a uniform magnetic field B= 0.2T. If PR = 1m, the net force on the wire is
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A current i = 2A be flowing in each part of a wire frame as shown in fig. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field B=4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is
A current i = 2A be flowing in each part of a wire frame as shown in fig. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field B=4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is
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Wires 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle q to each other. What is the force on a small element dl of wire 2 at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire 1
Wires 1 and 2 carrying currents i1 and i2 respectively are inclined at an angle q to each other. What is the force on a small element dl of wire 2 at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire 1
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PQ is a uniform rod of length 
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PQ is a uniform rod of length and mass m carrying current i and is suspended in uniform magnetic field of induction acting inward as shown in figure. The tension in each string is
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Two wires AO and OC carry currents i as shown in figure. One end of both the wires extends to infinity ÐAOC=a, the magnitude of magnetic field at a point P on the bisector of the two wires at a distance r from O is
Two wires AO and OC carry currents i as shown in figure. One end of both the wires extends to infinity ÐAOC=a, the magnitude of magnetic field at a point P on the bisector of the two wires at a distance r from O is
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A uniform conducting wire ABC has a mass of 10g. A current of 2A flows through it. the wire is kept in a uniform magnetic field B = 2T. The acceleration of the wire will be
A uniform conducting wire ABC has a mass of 10g. A current of 2A flows through it. the wire is kept in a uniform magnetic field B = 2T. The acceleration of the wire will be
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In the following figure a wire bent in the form of a regular polygon of n sides is inscribed in a circle of radius a. Net magnetic field at centre will be
In the following figure a wire bent in the form of a regular polygon of n sides is inscribed in a circle of radius a. Net magnetic field at centre will be
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Figure shows the cross-sectional view of the hollow cylindrical conductor with inner radius ‘R’ and outer radius ‘2R’. Cylinder is carrying uniformly distributed current along it’s axis. The magnetic induction at point ‘P’ at a distance 
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Figure shows the cross-sectional view of the hollow cylindrical conductor with inner radius ‘R’ and outer radius ‘2R’. Cylinder is carrying uniformly distributed current along it’s axis. The magnetic induction at point ‘P’ at a distance from the axis of the cylinder will be
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In the given loop the magnetic field at the centre O is
In the given loop the magnetic field at the centre O is
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A cube made of wire of equal length is connected to a battery as shown in the figure. The magnetic field at the centre of the cube is
A cube made of wire of equal length is connected to a battery as shown in the figure. The magnetic field at the centre of the cube is
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The magnetic field at the centre of semicircle o in the figure is
The magnetic field at the centre of semicircle o in the figure is
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The wire shown in figure carries a current of 40A. If r=3.14cm the magnetic field at point p will be
The wire shown in figure carries a current of 40A. If r=3.14cm the magnetic field at point p will be
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