Assertion: In non-uniform magnetic field speed of a charged particle varies.

Reason: Work done by magnetic force on a charged particle is always zero.

Assertion: Three infinitely long current carrying wires have equal currents and they are equally spaced. The magnitude of magnetic force on all three is same.

Reason: Net force on wire-$2$ is zero.

Assertion: Two infinitely long wires $A$ and $B$ carry unequal currents both in an inward direction. Then, there is only one point (excluding the points at infinity) where the net magnetic field is zero.

Reason: That point lies between points $A$ and $B$.

Assertion: Path of a charged particle in uniform magnetic field cannot be a parabola if no other forces (other than magnetic force) are acting on the particle.

Reason: For parabolic path a constant acceleration is required.

Assertion: Upper wire shown in figure is fixed. At a certain distance $x$, lower wire can remain in equilibrium.

Reason: The above equilibrium of lower wire is stable equilibrium.

Assertion: Net torque in the current-carrying loop placed in a uniform magnetic field (pointing inwards) is zero.

Reason: Magnetic moment is inwards.

Assertion: A charged particle is rotating in a circle. Then, magnetic field at centre of circle and magnetic moment produced by motion of charged particle are parallel to each other.

Reason: $M$ and $B$ are always parallel to each other.

Assertion: If a charged particle enters from outside in uniform magnetic field then it will keep on rotating in a circular path.

Reason: Magnetic force is always perpendicular to velocity vector.

Assertion: Magnetic field and electric field are present in a region. The net force on a charged particle in this region is zero if

$\overrightarrow{E}=\overrightarrow{B}\times \overrightarrow{v}$.

Reason: $\frac{E}{B}$ has the dimensions of velocity.