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A pulse shown here is reflected from the rigid wall A and then from free end B. The shape of the string after these 2 reflection will be
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A block of mass 1 kg is hanging vertically from a string of length 1 m and mass/length = 0.001 Kg/m. A small pulse is generated at its lower end. The pulse reaches the top end in approximately
A block of mass 1 kg is hanging vertically from a string of length 1 m and mass/length = 0.001 Kg/m. A small pulse is generated at its lower end. The pulse reaches the top end in approximately
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Figure shown the shape of part of a long string in which transverse waves are produced by attaching one end of the string to tuning fork of frequency 250 Hz. What is the velocity of the waves?
Figure shown the shape of part of a long string in which transverse waves are produced by attaching one end of the string to tuning fork of frequency 250 Hz. What is the velocity of the waves?
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The magnetic dipole 
is placed parallel to an infinitely long straight wire as shown in figure
The magnetic dipole is placed parallel to an infinitely long straight wire as shown in figure
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A square loop of side 
is placed in the neighbourhood of an infinitely long straight wire carrying a current I1. The loop carries a current I2 as shown in figure
A square loop of side is placed in the neighbourhood of an infinitely long straight wire carrying a current I1. The loop carries a current I2 as shown in figure
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Why was it important for Thomson to evacuate the air from the apparatus?
Why was it important for Thomson to evacuate the air from the apparatus?
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A rod AB moves with a uniform velocity v in a uniform magnetic field as shown in figure.
A rod AB moves with a uniform velocity v in a uniform magnetic field as shown in figure.
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In a region of space, a uniform magnetic field B exists in the y-direction. A proton is fired from the origin, with its initial velocity v making a small angle a with the y-direction in the yz plane. In the subsequent motion of the proton,
In a region of space, a uniform magnetic field B exists in the y-direction. A proton is fired from the origin, with its initial velocity v making a small angle a with the y-direction in the yz plane. In the subsequent motion of the proton,
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Two charged particle A and B each of charge +e and masses 12 amu and 13 amu respectively follow a circular trajectory in chamber X after the velocity selector as shown in the figure. Both particles enter the velocity selector with speed 1.5 × 106 ms–1. A uniform magnetic field of strength 1.0 T is maintained within the chamber X and in the velocity selector.
Two charged particle A and B each of charge +e and masses 12 amu and 13 amu respectively follow a circular trajectory in chamber X after the velocity selector as shown in the figure. Both particles enter the velocity selector with speed 1.5 × 106 ms–1. A uniform magnetic field of strength 1.0 T is maintained within the chamber X and in the velocity selector.
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A wire carrying I is shaped as shown. Section AB is a quarter circle of radius r. The magnetic field at C is directed
A wire carrying I is shaped as shown. Section AB is a quarter circle of radius r. The magnetic field at C is directed
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Figure shows a square current carrying loop ABCD of side 10 cm and current i = 10A. The magnetic moment 
of the loop is
Figure shows a square current carrying loop ABCD of side 10 cm and current i = 10A. The magnetic moment of the loop is
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A straight current carrying conductor is placed in such a way that the current in the conductor flows in the direction out of the plane of the paper. The conductor is placed between two poles of two magnets, as shown. The conductor will experience a force in the direction towards
A straight current carrying conductor is placed in such a way that the current in the conductor flows in the direction out of the plane of the paper. The conductor is placed between two poles of two magnets, as shown. The conductor will experience a force in the direction towards
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A rectangular coil PQ has 2n turns, an area 2a and carries a current 2I, (refer figure). The plane of the coil is at 60° to a horizontal uniform magnetic field of flux density B. The torque on the coil due to magnetic force is
A rectangular coil PQ has 2n turns, an area 2a and carries a current 2I, (refer figure). The plane of the coil is at 60° to a horizontal uniform magnetic field of flux density B. The torque on the coil due to magnetic force is
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A thin non conducting disc of radius R is rotating clockwise (see figure) with an angular velocity w about its central axis, which is perpendicular to its plane. Both its surfaces carry +ve charges of uniform surface density. Half the disc is in a region of a uniform, unidirectional magnetic field B parallel to the plane of the disc, as shown. Then,
A thin non conducting disc of radius R is rotating clockwise (see figure) with an angular velocity w about its central axis, which is perpendicular to its plane. Both its surfaces carry +ve charges of uniform surface density. Half the disc is in a region of a uniform, unidirectional magnetic field B parallel to the plane of the disc, as shown. Then,
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In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is
In the figure shown a coil of single turn is wound on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. Current in the coil is i. The value of B if the sphere is in equilibrium is
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A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current i = 4A. A horizontal magnetic field B = 10T is switched on at time t = 0 as shown in figure. The initial angular acceleration of the ring will be
A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current i = 4A. A horizontal magnetic field B = 10T is switched on at time t = 0 as shown in figure. The initial angular acceleration of the ring will be
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