20. LV B will be <2v The two ends of a uniform conductor are joined to a cell of e.m.f. E and some internal resistance. Starting from the midpoint P of the conductor, we move in the direction of current and return to P. The potential V at every point on the path is plotted against the distance covered (*). Which of the following graphs best represents the resulting curve cer is ent (a) 4 (c)

Statement : l. All boys are experts. ll.Some experts are travelers. lll.All travelers are foreigners. Conclusion: l.Some foreigners are experts. ll.Some foreigners are boys. lll.No foreigners is boy. lV.All travelers are expert.

A non-conducting rod having circular cross section of radius R is suspended from a rigid support as shown in fig. A light and small coil of 300turns is wrapped tightly at the left end where uniform magnetic filed B exists in vertically downward direction. Air of density rho hits the half of the right part of the rod with velocity V as shown in the fig. What should be current in clockwise direction (as seen from O) in the coil so that rod remains horizontal? Give answer in mA. Given 2/(Lv)sqrt((piRB)/(rho))=1/(sqrt5)A^(-1//2) .

A non-conducting rod having circular cross section of radius R is suspended from a rigid support as shown in fig. A light and small coil of 300turns is wrapped tightly at the left end where uniform magnetic filed B exists in vertically downward direction. Air of density rho hits the half of the right part of the rod with velocity V as shown in the fig. What should be current in clockwise direction (as seen from O) in the coil so that rod remains horizontal? Give answer in mA. Given 2/(Lv)sqrt((piRB)/(rho))=1/(sqrt5)A^(-1//2) .

The order of increasing s character (in percentage) in the hybrid orbitals of the following molecules/ions is l CO_(3) ^(2-) ll XeF _(4) lll l_(3) ^(-) lV NCl _(3) (V) BeCl_(2)

Poiseuille's's law for the flow of a liquid in a capillary tube is given by eta=(piDeltaPa^(4))/(8LV) where eta = co-efficient of viscosity of a liquid DeltaP = Pressure difference across a length (L) of a tube of radius (a) and V = Volume of the liquid flowing per second The maximum error that enters the calculations of eta is due to the measurement of

A given mass m of a solid is supplied with heat continuously at a constant rate and the graph shown in the adjacent figure is plotted. If L_f and L_v are latent heats of fusion and latent heats of vapourisation and S_l and S_s are specific heats of liquid and solid respectively. It can be concluded that

When m gram of steam at 100^(@) C is mixed with 200 gm of ice at 0^(@)C . it results in water at 40^(@) C . Find the value of m in gram . (given : Latent heat of fusion ( L_f ) = 80 cal/gm, Latent heat of vaporisation ( L_v ) = 540 cal/gm., specific heat of water ( C_w )= 1 cal/gm/C)

When m gram of steam at 100^(@) C is mixed with 200 gm of ice at 0^(@)C . it results in water at 40^(@) C . Find the value of m in gram . (given : Latent heat of fusion ( L_f ) = 80 cal/gm, Latent heat of vaporisation ( L_v ) = 540 cal/gm., specific heat of water ( C_w )= 1 cal/gm/C)