A U tube of uniform square cross-sectional side a has mercury in it. Current I is passed between sealed electrodes x and y. A magnetic field `B` is applied across horizontal section perpendicular to the plane of diagram. The difference in mercury levels is [Given: `rho` = density of mercury]
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A square shaped current loop of side length L and carrying current I lies in a uniform magnetic field B acting perpendicular to the plane of squre loop and directed inward. The net magnetic force acting on current loop is

A vertical U shaped tube of uniform cross-section contains mercury in both limbs. Another liquid of density 3.4 g/cm^3 is poured In one limb of column length 4 cm as shown in figure. Then difference (h) between the upper level of liquid in both the limbs is (density of mercury = 13.6 g/cm^3)

A vertical U-tube of uniform cross-section contains mercury. Through one of its limbs, some water is poured such that the mercury level in that limb goes down by 2 cm. What will be the height of the water column?

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : torque acting on the coil

A U - tube of uniform cross section contains mercury upto a height h in either limb. The mercury in one limbe is depressed a little and then relased. Obtain an expression for time period (T) of oscillation, assuming that T depends on h, rho and g, where rho is density of mercury.

A U-tube of uniform cross-section contains some mercury. If water is poured into one of the limbs up to a height of 13.4cm, then find the rise in the mercury level in the other limb. The density of mercury = 13.4g*cm^(-3) .

An open U -tube of uniform cross-section contains mercury. When 27.2 cm of water is poured into one limb of the tube, (a) how high does the mercury rise in the limb from its initial level ? (b) what is the difference in levels of liquids of the two sides ? ( rho_(w) =1 and rho_(Hg) =13. 6 units)

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : magnetic moment

The arms of a vertical U tube of uniform inner cross section contains mercury. In one of the arms of the tube, water column of length 8 cm is introduced. In the other arm, oil of density 0.75 g/cm ""^(3) is poured till the upper surfaces of water and oil are at same horizontal level. Calculate the length of oilcolumn.