A straight wire of length $0.5\, metre$ and carrying a current of $1.2\, ampere$ placed in a uniform magnetic field of induction $2\, Tesla$. The magnetic field is perpendicular to the length of the wire. The force on the wire is.......$N$
$2.4$
$1.2$
$3$
$2$
A power line lies along the east-west direction and carries a current of $10\, ampere$. The force per metre due to the earth's magnetic field of ${10^{ - 4}}\,tesla$ is
A long straight wire carrying current of $25$ $\mathrm{A}$ rests on a table as shown in figure. Another wire $\mathrm{PQ}$ of length $1$ $\mathrm{m}$, mass $2.5$ $\mathrm{g}$ carries the same current but in the opposite direction. The wire $\mathrm{PQ}$ is free to slide up and down. To what height will $\mathrm{PQ}$ rise ?
Force on current carrying loop (Radius $= R$ ) in uniform magnetic $(B)$ field which is at an angle $30^{\circ}$ with the normal will be
A rigid wire consists of a semicircular portion of radius $R$ and two straight sections. The wire is partially immerged in a perpendicular magnetic field $B=B_0\ {j}$ as shown in figure. The magnetic force on the wire if it has a current $i$ is :
Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They exert