153133
The electric current in a circular coil of 2 turns produces a magnetic induction $B_{1}$ at its centre. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction $B_{2}$ at its centre.
The ratio of $\frac{B_{2}}{B_{1}}$ is :
153136
A current carrying loop ABCD has two circular ares $A D$ and $B C$ with radius $1 \mathrm{~cm}$ and $2 \mathrm{~cm}$ respectively as shown in the figure. The two ares $\mathrm{AD}$ and $\mathrm{BC}$ subtend a common angle $30^{\circ}$ at the centre $O$. If the current flowing in the loop is $\frac{1.2}{\pi} \mathrm{A}$ then the magnitude of net magnetic field at $O$ is (Given $\mu_{0}=4 \pi \times 10^{-7}$ )
153138
Statement (I) : A bar magnet exerts a torque on itself due to its own field.
Statement (II) : Magnet field lines can be entirely confined within the core of toroid.
Statement (III) : The net magnetic flux through any closed surface is zero.
Which of the following is correct?
153133
The electric current in a circular coil of 2 turns produces a magnetic induction $B_{1}$ at its centre. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction $B_{2}$ at its centre.
The ratio of $\frac{B_{2}}{B_{1}}$ is :
153136
A current carrying loop ABCD has two circular ares $A D$ and $B C$ with radius $1 \mathrm{~cm}$ and $2 \mathrm{~cm}$ respectively as shown in the figure. The two ares $\mathrm{AD}$ and $\mathrm{BC}$ subtend a common angle $30^{\circ}$ at the centre $O$. If the current flowing in the loop is $\frac{1.2}{\pi} \mathrm{A}$ then the magnitude of net magnetic field at $O$ is (Given $\mu_{0}=4 \pi \times 10^{-7}$ )
153138
Statement (I) : A bar magnet exerts a torque on itself due to its own field.
Statement (II) : Magnet field lines can be entirely confined within the core of toroid.
Statement (III) : The net magnetic flux through any closed surface is zero.
Which of the following is correct?
153133
The electric current in a circular coil of 2 turns produces a magnetic induction $B_{1}$ at its centre. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction $B_{2}$ at its centre.
The ratio of $\frac{B_{2}}{B_{1}}$ is :
153136
A current carrying loop ABCD has two circular ares $A D$ and $B C$ with radius $1 \mathrm{~cm}$ and $2 \mathrm{~cm}$ respectively as shown in the figure. The two ares $\mathrm{AD}$ and $\mathrm{BC}$ subtend a common angle $30^{\circ}$ at the centre $O$. If the current flowing in the loop is $\frac{1.2}{\pi} \mathrm{A}$ then the magnitude of net magnetic field at $O$ is (Given $\mu_{0}=4 \pi \times 10^{-7}$ )
153138
Statement (I) : A bar magnet exerts a torque on itself due to its own field.
Statement (II) : Magnet field lines can be entirely confined within the core of toroid.
Statement (III) : The net magnetic flux through any closed surface is zero.
Which of the following is correct?
153133
The electric current in a circular coil of 2 turns produces a magnetic induction $B_{1}$ at its centre. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction $B_{2}$ at its centre.
The ratio of $\frac{B_{2}}{B_{1}}$ is :
153136
A current carrying loop ABCD has two circular ares $A D$ and $B C$ with radius $1 \mathrm{~cm}$ and $2 \mathrm{~cm}$ respectively as shown in the figure. The two ares $\mathrm{AD}$ and $\mathrm{BC}$ subtend a common angle $30^{\circ}$ at the centre $O$. If the current flowing in the loop is $\frac{1.2}{\pi} \mathrm{A}$ then the magnitude of net magnetic field at $O$ is (Given $\mu_{0}=4 \pi \times 10^{-7}$ )
153138
Statement (I) : A bar magnet exerts a torque on itself due to its own field.
Statement (II) : Magnet field lines can be entirely confined within the core of toroid.
Statement (III) : The net magnetic flux through any closed surface is zero.
Which of the following is correct?