JEE Mains Physics 2002-2019 Solved Video Solutions
A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic field of 0.5 T. If an electric field of 100 V/m makes it to move in a straight path, then the mass of the particle is (Given charge of electron 1.6 x 10^–19 C)
21
Nov
A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic field of 0.5 T. If an electric field of 100 V/m makes it to move in a straight path, then the mass of the particle is (Given charge of electron 1.6 [...]
A current loop, having two circular arcs joined by two radial lines shows in the figure. It carries a current of 10 A. The magnetic field at point O will be close to :
21
Nov
A current loop, having two circular arcs joined by two radial lines shows in the figure. It carries a current of 10 A. The magnetic field at point O will be close to : A current loop having two circular arcs joined by two radial lines shows in the figure. It carries a current of [...]
Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5A. (See figure) (µ0 = 4π × 10^–7 N-A^ –2)
21
Nov
Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5A. (See figure) (µ0 = 4π × 10^–7 N-A^ –2) Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a current of 5A. [...]
A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows through it. This galvanometer can be converted into (i) an ammeter of range 0 to I0(I0 > Ig) by connecting a shunt resistance RA to it and (ii) into a voltmeter of range 0 to V (V = GI0) by connecting a series resistance RV to it. Then,
21
Nov
A moving coil galvanometer, having a resistance G, produces full scale deflection when a current Ig flows through it. This galvanometer can be converted into (i) an ammeter of range 0 to I0(I0 > Ig) by connecting a shunt resistance RA to it and (ii) into a voltmeter of range 0 to V (V = [...]
A galvanometer of resistance 100 Ω has 50 divisions on its scale and has sensitivity of 20 Ω A/division. It is to be converted to a voltmeter with three ranges of 0-2V, 0-10 V and 0-20 V. The appropriate circuit to do so is
21
Nov
A galvanometer of resistance 100 Ω has 50 divisions on its scale and has sensitivity of 20 Ω A/division. It is to be converted to a voltmeter with three ranges of 0-2V, 0-10 V and 0-20 V. The appropriate circuit to do so is 0-10 V and 0-20 V. The appropriate circuit to do so [...]
A magnetic compass needle oscillates 30 times per minute at a place where the dip is 45°, and 40 times per minute where the dip is 30º. If B1 and B2 are respectively the total magnetic field due to the earth at the two places, then the ratio B1/ B2 is best given by :
21
Nov
A magnetic compass needle oscillates 30 times per minute at a place where the dip is 45°, and 40 times per minute where the dip is 30º. If B1 and B2 are respectively the total magnetic field due to the earth at the two places, then the ratio B1/ B2 is best given by : [...]
A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 π rad s^–1 about its axis, perpendicular to its plane. If the magnetic field at its centre is 3.8 × 10^–9 T, then the charge carried by the ring is close to (μ0 = 4 π × 10^–7 N/A^2 )
21
Nov
A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 π rad s^–1 about its axis, perpendicular to its plane. If the magnetic field at its centre is 3.8 × 10^–9 T, then the charge carried by the ring is close to (μ0 [...]
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Chapter 13 - Magnetic Effect of Current
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JEE Mains Physics 2002-2019 Solved Video Solutions
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A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 π rad s^–1 about its axis ,
perpendicular to its plane. If the magnetic field at its centre is 3.8 × 10^–9 T ,
then the charge carried by the ring is close to (μ0 = 4 π × 10^–7 N/A^2 ) ,
The magnitude of the magnetic field at the center of an equilateral triangular loop of side 1 m which is carrying a current of 10 A is : [Take μ0=4π×10^−7NA^−2]
21
Nov
The magnitude of the magnetic field at the center of an equilateral triangular loop of side 1 m which is carrying a current of 10 A is : [Take μ0=4π×10^−7NA^−2] The magnitude of the magnetic field at the center of an equilateral triangular loop of side 1 m which is carrying a current of 10 [...]
A square loop is carrying a steady current I and the magnitude of its magnetic dipole moment is m. if this square loop is changed to a circular loop and it carries the same current, the magnitude of the magnetic dipole moment of circular loop will be:
21
Nov
A square loop is carrying a steady current I and the magnitude of its magnetic dipole moment is m. if this square loop is changed to a circular loop and it carries the same current, the magnitude of the magnetic dipole moment of circular loop will be: A square loop is carrying a steady current [...]
A moving coil galvanometer has a coil with 175 turns and area 1 cm^2 . It uses a torsion band of torsion constant 10^–6 N-m/rad. The coil is placed in a magnetic field B parallel to its plane. The coil deflects by 1° for a current of 1 mA. The value of B (in Tesla) is approximately
21
Nov
A moving coil galvanometer has a coil with 175 turns and area 1 cm^2 . It uses a torsion band of torsion constant 10^–6 N-m/rad. The coil is placed in a magnetic field B parallel to its plane. The coil deflects by 1° for a current of 1 mA. The value of B (in Tesla) [...]