A place large aluminium sheet is connected to a bettery of emf `epsi=12V` The sheet develops surface density of charge `sigma =0.9 nC//m^(2)` Calculate the potential at apoint distant x=2 along the normal to the sheet At what distance potential is zero ?
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Aluminium reacts with sulphure to form a aluminium sulphide . If 5.4 gm of Aluminium reacts with 12.8 gm sulphure gives 12 gm of aluminium sulphides ,
`2Al + 2S to Al_(2)S_(3)` Mole taken `{:((5.4)/(27) gm ,(12.8)/(32)),(=0.2,=0.4):}` `("mole taken")/("stoich coeff"){:((0.2)/(2),(0.4)/(3)),(=0.1,=0.133),((L.R.),):}` moles of `Al_(2)S_(3)` formed `=(1)/(2)xx0.2=0.1` mass=`0.1xx150=15` gm `%` yield `=("actual yield")/("theoritical yield")xx100=(12)/(15)xx100=80%`
2 Answers 1 views
A nonconducting sheet of large surface area and thickness d contains uniform charge distribution of density `rho`. Find the electric field at a point
Correct Answer - `2:1`
2 Answers 1 views
A dielectric disc of radius R and uniform positive surface charge density `sigma` is placed on the grup with its axis vertical. A particle of mass m a
Correct Answer - (i) `H=(4)/(3)R` (ii). `H=(R)/(sqrt(3))`
2 Answers 1 views
An infinite sheet in xy plane has a uniform surface charge density `sigma`. The thickness of the sheet is infinitesimally small. The sheet begins to m
Correct Answer - (1) `E=sigma/(2in_(0))` perpendiculary away from the sheet `B=(mu_(0)sigmav)/2` parallel to the sheet in `-ve` and `+ve` y direction (2) E= same as in (1);`B=0`
2 Answers 2 views
Two batteries of emf 12V and 6V and internal resistance `2Omega` and `1Omega` are connected in parallel and the combination is connected to a resisor
Correct Answer - a) 8V, b) 6V, c)8V, 0.67 `Omega`
2 Answers 1 views
An infintie nonconducting sheet a surface density of change `sigma` Around the foot og the perpendicular from a point P a circle of radius r is drawn
Correct Answer - `r=sqrt()3a`
2 Answers 1 views
Two metal balls with radii `r_(1)=1 cm` and `r_(2)=2cm` at a large distance R=100 cm from each other, are connected to a battery of emf `epsi=3000 V`
Correct Answer - `epsi^(2)((r_(1)r_(2))/(r_(1)+r_(2)))^(2)/(R^(2))=4.4xx10^(-8)N;` since the distance is large, charge is assumed to be unifromly distribuited
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A tangent galvanometer has a reduction factor of 0. 2A . It gives a deflection of `45^(@)` when connected to a bettery of 6 V having internal resistan
Correct Answer - `15 Omega`
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Two capacitors of capacitances `20 .0pF` and `50.0pF ` are connected in series with a `6.00V bettery . Find (a )the potential difference across each c
Correct Answer - (i). 1.71 V, 4.29V (ii). `184pJ,73.5pJ`
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Dinesh went from place A to place B and from there to place C. A is 7.5 km from B and B is 12.7 km from C. Ayub went from place A to place D and from
Correct Answer - अयूब ने ज्यादा दूरी तय की। यह दूरी 0.9 km या 900 m ज्यादा थी।
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