List of top Physics Questions on Magnetic Effects of Current and Magnetism asked in AP EAPCET

If a current is passing in a spring, it

Magnetic moment of an electron moving in a circular orbit of radius \(r\) with a speed \(v\) is

A material satisfies the relation \(\mu_0(H+M)=0\), where \(H\) and \(M\) are magnetic intensity and magnetization respectively; then the material is

A particle having charge 'q' enters a uniform transverse magnetic field \( \vec{B} \). It is deflected through a distance 'x' while travelling a distance 'y' as shown in figure. The magnitude of the momentum of the particle is:

A current carrying circular coil of radius 'r' produces a magnetic induction of 1 T at its centre. The magnetic induction at a distance of \(\sqrt{3}r\) on its axis from its centre is:

Two identical bar magnets are placed one above the other such that they are mutually perpendicular and bisect each other. The time period of this combination in a horizontal magnetic field is 'T'. The time period of each magnet in the same field is:

A circular coil connected to a battery of emf E produced a magnetic field at its centre. The coil is unwound, stretched to double its length and rewound into a coil of \( \left(\frac{1}{3}\right)^{\text{rd}} \) of its initial radius. If this coil is connected to a battery of emf E' to produce same magnetic field at its centre, then E' is:

Two identical short bar magnets, each having a magnetic moment of 10 \( \text{Am}^{2} \) are arranged such that their axial lines are perpendicular to each other and their centres be along the same straight line in a horizontal plane. If the distance between their centres is 0.2 m, the resultant magnetic induction at a point midway between them is: (\( \mu_{\circ}=4\pi\times10^{-7}~\text{Hm}^{-1} \))

A wire of length L carrying a current of I ampere is initially bent in the form of a circular coil of one turn. If the same wire is bent into a circular coil of two turns without any change in the current, then the magnetic field at the center of the coil:

A magnetic needle kept in a non-uniform magnetic field experiences:

A wire carrying current I and other parallel wire carrying current 2I in the same direction produces a magnetic field B at the midpoint between them. Then the magnitude of field at the same point, when the 2I wire is switched off

The earth's magnetic field at a certain place has a total strength of 0.5 Gauss and the horizontal component of 0.3 Gauss. Then the angle of dip at that place is

The force experienced by a charge $q$ moving with velocity $v$ in a magnetic field $B$ is maximum when the angle between $v$ and $B$ is

The magnetic field at the centre of a circular coil of radius $r$ carrying a current $I$ is proportional to

A current loop of magnetic moment $ 0.5 \, \text{Am}^2 $ is placed in a magnetic field of $ 0.4 \, \text{T} $. If the loop is rotated from an angle of $ 0^\circ $ to $ 180^\circ $, what is the change in potential energy?}

A short magnetic needle is placed in a magnetic field \(B\hat{i}\) in the direction \((\sqrt{3}\hat{i}+\hat{j})\). The needle experiences a torque of \(0.06\ \text{N m}\). If the same magnetic needle is placed in a magnetic field \(2B\hat{j}\) in the direction \((\hat{i}+\sqrt{3}\hat{j})\), the torque experienced by it is

An infinitely long wire carrying \(1\ \text{A}\) current in the \(+Z\) direction is placed at \((1\ \text{cm},1\ \text{cm})\). Another wire carrying \(1\ \text{A}\) in \(+X\) direction is placed at \(y=1\ \text{cm}\). If the magnetic field due to this configuration at the origin is \(\vec{B}\). Let \(B_0\) be the magnitude of the field if only the wire at \((1\ \text{cm},1\ \text{cm})\) was present, then \(\frac{\vec{B}}{B_0}\) is

The magnetic field due to a current carrying circular loop of radius \(6\ \text{cm}\) at a point on the axis at a distance of \(8\ \text{cm}\) from its centre is \(27\ \mu\text{T}\). The magnetic field at the centre of the current carrying loop is

A particle of charge \(1.0\times10^{-16}\ \text{C}\) moves through a uniform magnetic field \[ \vec{B}=B_0(\hat{i}+4\hat{j})\ \text{T}. \] The particle velocity at some instant is \[ \vec{V}=(2\hat{i}+4\hat{j})\ \text{m s}^{-1} \] and the magnetic force acting on it is \[ 3\times10^{-16}\hat{k}\ \text{N}. \] The magnitude of \(B_0\) is

A short bar magnet produces a magnetic field of \(6.4\times 10^{-5}\,\text{T}\) at a distance of \(20\,\text{cm}\) from the center of the magnet on the normal bisector of the magnet. The magnetic field produced by this magnet at a distance of \(40\,\text{cm}\) from the center of the magnet on the axis is:

A toroid has a non-ferromagnetic core of inner radius \(24\;cm\) and outer radius \(25\;cm\), around which \(4900\) turns of a wire are wound. If the current in the wire is \(12\;A\), the magnetic field inside the core of the toroid is