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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Perpendiculars are drawn from points on the line `(x+2)/2=(y+1)/(-1)=z/3` to the plane `x + y + z=3` The feet of perpendiculars lie on the line (a) `x/5=(y-1)/8=(z-2)/(-13)` (b) `x/2=(y-1)/3=(z-2)/(-5)` (c) `x/4=(y-1)/3=(z-2)/(-7)` (d) `x/2=(y-1)/(-7)=(z-2)/5` |
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Answer» Any point `k` on the given line `(x+2)/2=(y+1)/-1=z/3` can be shown as `(2lambda-2,-lambda-1,3lambda)` Equation of plane is `x+y+z=3`. So, point k should satisfy plane equation. Thus, `2lambda - 2-lambda-1+3lambda = 3` `=>4lambda = 6` `=>lambda = 3/2` Putting this value of `lambda`, point k becomes (1,-5/2,9/2). Now, putting these co-ordinates in all the options, we find only option D satisfies the condition. So, `Option D` is the correct option. |
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| 52. |
At `400 K`, the root mean square (rms) speed of a gas X (molecular weight = 40) is equal to the most probable speed of gas Y at 60 K. The molecular weight of the gas Y is. |
| Answer» Correct Answer - 4 | |
| 53. |
Conisder a neutral conducting sphere. A poistive point charge is placed outisde the sphere. The net charge on the sphere is thenA. negative and distributed uniformly over the surface of the sphereB. negative and appears only at the point on the sphere closest to the point chargeC. negative and distributed non-uniformly over the entire surface of the sphereD. zero |
| Answer» Correct Answer - D | |
| 54. |
A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inisde the emptied space is A. zero everywhereB. non-zero and uniformC. non-uniformD. zero only at its center. |
| Answer» Correct Answer - B | |
| 55. |
A thin uniform disc (see figure) of mass M has outer radius 4R and inner radius 3R. The work required to take a unit mass for point P on its axis to infinity is A. `(2GM)/(7R)(4sqrt(2)-5)`B. `-(2GM)/(7R)(4sqrt(2)-5)`C. `(GM)/(4R)`D. `(2GM)/(5R) (sqrt(2)-1)` |
| Answer» Correct Answer - A | |
| 56. |
The figure shows a system consisting of (i) a ring the outer radius 3R rolling clockwise without slipping on a horizontal surface with angular speed `omega` and (ii) an inner disc of radius 2R rotating anti clockwise with angular speed `omega//2.` The ring and disc are separted. The point P on the inner disc is at a distance R from the origin, where OP makes an angle of `30^@` with the horizontal. Then with respect to the horizontal surface,A. the point O has a linear velocity `3R omega hat(i)`.B. the point P has a linear velocity `(11)/(4) R omega hat(i)+(sqrt(3))/(4)R omega hat(k)`.C. the point P has a linear velocity`(13)/(4) R omegahat(i)-(sqrt(3))/(4)R omega hat(k)`.D. the point P has a linear velocity `(3-(sqrt(3))/(4))R omega hat(i)+(1)/(4)R omega hat(k)`. |
| Answer» Correct Answer - A::B | |
| 57. |
A small spherical monoatomic ideal gas bubble `(gamma=5//3)` is trapped inside a liquid of density `rho` (see figure). Assume that the bubble does not exchange any heat with the liquid. The bubble contains n moles of gas. The temperature of the gas when the bubble is at the bottom is `T_0`, the height of the liquid is H and the atmospheric pressure `P_0` (Neglect surface tension). The buoyancy force acting on the gas bubble is (Assume R is the universal gas constant)A. `rho n R g T_(0) (P_(0)+rho_(t)gH)^(2//5)/(P_(0)+rhogy)^(7//5)`B. `(rho n R g T_(0))/(p_(0)+rhog H)^(2//5)[P_(0)+rhog(H-y)]^(3//5)`C. `rhon R g T_(0)(P_(0)+rho g H)^(3//5)/(P_(0)+rho g y)^(8//5)`D. `rho n R g T_(0)(P_(0)+rhogH)/(P_(0)+rho g y)^(8//5)` |
| Answer» Correct Answer - B | |
| 58. |
A small spherical monoatomic ideal gas bubble `(gamma=5//3)` is trapped inside a liquid of density `rho` (see figure). Assume that the bubble does not exchange any heat with the liquid. The bubble contains n moles of gas. The temperature of the gas when the bubble is at the bottom is `T_0`, the height of the liquid is H and the atmospheric pressure `P_0` (Neglect surface tension). When the gas bubble is at a height y from the bottom, its temperature is-A. `T_(0)((P_(0)+rho gH))/(P_(0)+rho gy)^(2//5)`B. `T_(0)((P_(0)+rho g(H-y)))/(P_(0)+rho gH)^(2//5)`C. `T_(0)((P_(0)+rho gH))/(P_(0)+rho gy)^(3//5)`D. `T_(0)((P_(0)+rho g(H-y)))/(P_(0)+rho g H)^(3/5)` |
| Answer» Correct Answer - B | |
| 59. |
The major product(s) of the following reaction is(are) A. PB. QC. RD. S |
| Answer» Correct Answer - B | |
| 60. |
After completion of the reactions (I and II) , the organic compound(s) in the reaction mixtures is(are) A. Reaction I: P and Reaction II:PB. Reaction I : U, acetone and Reaction II:Q, acetoneC. Reaction I : T,U, acetone and Reaction II:PD. Reaction I : R, acetone and Reaction II:S ,acetone |
| Answer» Correct Answer - C | |
| 61. |
In a galvanic cell, the salt bridge.A. does not participate chemically in the cell reaction.B. stops the diffusion of ions from one electrode to another.C. is necessary for the occurrence of the cell reactionD. ensures mixing of the two electrolytic solutions |
| Answer» Correct Answer - A::C::D | |
| 62. |
The correct statement (s) for orthoboric acid is/areA. It behaves as a weak acid in water due to self ionization.B. Acidity of its aqueous solution increases upon addition of ethylene glycolC. It has a three dimensional structure due to hydrogen bondingD. It is a weak electrolyte in water. |
| Answer» Correct Answer - A::B::D | |
| 63. |
The freezing point (`"in"^(@)"C"`) of a solution containing 0.1 g of `K_(3)[Fe(CN)_(6)]` ( Mol. Wt. 329) in 100g of water (`K_(f)"=1.86 k kg mol"^(-1))` isA. `-2.3 xx 10^(-2)`B. `-5.7 xx 10^(-2)`C. `-5.7 xx 10^(-3)`D. `-1.2 xx 10^(-2)` |
| Answer» Correct Answer - A | |
| 64. |
In the reaction, `P+Q rarr R+S` the time taken for `75%` reaction of `P` is twice the time taken for `50%` reaction of `P`. The concentration of `Q` varies with reaction time as shown in the figure. The overall order of the reaction is A. 2B. 3C. 0D. 1 |
| Answer» Correct Answer - D | |
| 65. |
Two identical discs of same radius `R` are rotating about their axes in opposite directions with the same constant angular speed `omega` . The discs are in the same horizontal plane. At time `t = 0` , the points `P` and `Q` are facing each other as shown in the figure. The relative speed between the two points `P` and `Q` is `v_(r)`. In one time period `(T) ` of rotation of the discs , `v_(r)` as a function of time is best represented by A. B. C. D. |
| Answer» Correct Answer - A | |
| 66. |
Assertion (A) :` Pb^(+4)` compounds are stronger oxidiising agents than ` Sn^(4+)` compounds . Reason (R): The higher oxidation states for group `14` elements are more stable for the heavier members of the group due to inert pair effect .A. STATEMENT -1 is True STATEMNET -2 is True , STATEMENT-2 is a correct explanation for STATEMENT-1B. STATEMENT-1 is True , STATEMENT -2 is True , STATEMENT -2 is not a correct explanation for STATEMENT -1C. STATEMENT 1 IS Treu STATEMENT-2 is FalseD. STATEMENT -1 is False , STATEMENT -2 is True |
| Answer» Correct Answer - C | |
| 67. |
Statement : The plot of atomic number ( y -axis ) versus number of neutrons ( x -axis ) for stable nuclei shows a curvature towards x-axis fron the line of ` 45^@` slope as the atomic number is increased . Explanation : proton -proton electrostatic repulsions begin to overcome attracive forces involving protons and neutrons in heavier nuclides.A. STATEMENT -1 is True STATEMNET -2 is True , STATEMENT-2 is a correct explanation for STATEMENT-1B. STATEMENT-1 is True , STATEMENT -2 is True , STATEMENT -2 is not a correct explanation for STATEMENT -1C. STATEMENT 1 IS Treu STATEMENT-2 is FalseD. STATEMENT -1 is False , STATEMENT -2 is True |
| Answer» Correct Answer - A | |
| 68. |
The equilibrium `2Cu^(1) hArr Cu^(0)+Cu^(11)` in aqueous medium at `25^(@)C` shifts towards the left in the presence ofA. `NO_(3)^(-)`B. `Cl^(-)`C. `SCN^(-)`D. `CN^(-)` |
| Answer» Correct Answer - B::C::D | |
| 69. |
The figure shows the P-V plot of an ideal gas taken through a cycle ABCDA. The part ABC is a semi-circle and CDA is half of an ellipse. Then, A. the process during the path `A to B` is isothermalB. heat flows out of the gas during the path `B to C to D`C. work done during the path ` A to B to C ` is zeroD. positive work is done by the gas in the cycle ABCDA |
| Answer» Correct Answer - B::D | |
| 70. |
The figure below shows the variation of specific heat capacity (C) of a solid as a function of temperature (T). The temperature is increased continuously form 0 to 500K at a constant rate. Ignoring any volume change, the following statement (s) is (are) correct to a reasonable approximation. A. the rate at which heat is absorbed in the range 0-100 K varies linearly with temperature T.B. heat absorbed in increasing the temperature from 0-100 K is less than the heat required for increasing the termperature from 400-500 K.C. there is no change in the rate of heat absorption in the range 400-500 K.D. the rate of heat absorption increases in the range 200-300 K. |
| Answer» Correct Answer - A::B::C::D | |
| 71. |
Upon heating`KClO_(3)` in presence of catalytic amount of `MnO_(2)`, a gas `W` is formed. Excess amount of `W` reacts with white phosphorus to given `X`. The reaction of `X` with pure `HNO_(3)` gives `Y` and `Z`. Y and Z are, respectivelyA. `N_(2)O_(3) and H_(3)PO_(4)`B. `N_(2)O_(5)andHPO_(3)`C. `N_(2)O_(4)and HPO_(3)`D. `N_(2)O_(4)and H_(3)PO_(3)` |
| Answer» Correct Answer - B | |
| 72. |
The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the following compound, is |
| Answer» Correct Answer - 8 | |
| 73. |
In the following reaction sequence, products I, J, and L are formed. `K` represents a reagent. The structures of product `I` is : The structures of compounds `J` and `K`, respectively, are : The structure of product `L` is : A. B. C. D. |
| Answer» Correct Answer - C | |
| 74. |
The correct functional group `X` and the reagent//reaction conditions `Y` in the following scheme are .A. `X = COOCH_(3), Y = H_(2)`/Ni/heatB. `X = CONH_(2), Y = H_(2)`/Ni/heatC. `X = CONH_(2), Y = Br_(2)//NaOH`D. `X = CN, Y = H_(2)`/Ni/heat |
| Answer» Correct Answer - C::D | |
| 75. |
An ideal gas in thermally insulated vessel at internal `(pressure)=P_(1), (volume)=V_(1)` and absolute `temperature = T_(1)` expands irreversiby against zero external, pressure , as shown in the diagram, The final internal pressure, volume and absolute temperature of the gas are `p_(2), V_(2) and T_(2)`, respectively . For this expansion A. `q = 0`B. `T_(2) = T_(1)`C. `P_(2)V_(2) = P_(1)V_(1)`D. `P_(2)V_(2)^(gamma) = P_(1)V_(1)^(gamma)` |
| Answer» Correct Answer - A::B::C::D | |
| 76. |
A student uses a simple pendulum of exactly `1m` length to determine `g`, the acceleration due ti gravity. He uses a stop watch with the least count of `1sec` for this and record `40 seconds` for `20` oscillations for this observation, which of the following statement `(s) is (are)` true?A. Errot `DeltaT` in measuring T, the time period, is 0.05 sB. Error `Delta T` in measuring T, the time period , is 1 sC. percentage error in the determination of g is 5%D. percentage error in the determination of g is 2.5 % |
| Answer» Correct Answer - A::C::D | |
| 77. |
Among the electrolytes `Na_(2),SO_(4),CaCl_(2),Al_(2)(SO_(4))_(3) and NH_(4)Cl`, the most effective coagulating agent for `Sb_(2)S_(3)` sol isA. `Na_(2)SO_(4)`B. `CaCl_(2)`C. `Al_(2)(SO_(4))_(3)`D. `NH_(4)Cl` |
| Answer» Correct Answer - C | |
| 78. |
Aqueous solution of `Na_(2)S_(2)O_(3)` on reaction with `CI_(2)`, givesA. `Na_(2)S_(4)O_(6)`B. `NaHSO_(4)`C. NaCID. NaOH |
| Answer» Correct Answer - B | |
| 79. |
Consider the following list of regents: Acidified `K_(2)Cr_(2)O_(7)`, alkaline `KMnO_(4)`, `CuSO_(4)`, `H_(2)O_(2)`, `CI_(2)`, `O_(3)`, `HNO_(3)`, and `Na_(2)S_(2)O_(3)`. The total number of reagents that can oxidis aqueous `I^(Theta)` ion `I_(2)` is |
| Answer» Correct Answer - 7 | |
| 80. |
The compound `P, Q and S` were separately subjected to nitration using `HNO_(3)//H_(2)SO_(4)`mixture. The major product formed in each case respectively isA. B. C. D. |
| Answer» Correct Answer - C | |
| 81. |
A free hydrogen atom after absorbing a photon of wavelength `lambda_(a)` gets excited from state n = 1 to n = 4. Immediately after electron jumps to n = m state by emitting a photon of wavelength `lambda_(e )`. Let change in momentum of atom due to the absorption and the emission are `Delta P_(a)` and `Delta P_(e)` respectively. If `lambda_(a)//lambda_(e )= 1//5`. Which of the following is correctA. m = 2B. `Delta P_(a)//Delta P_(e )= 1//2`C. `lambda_(e )=418 nm`D. Ratio of K.E. of electron in the state n = m to n= 1 is `1//4` |
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Answer» Correct Answer - A::D `(lambda_(a))/(lambda_(e ))=(E_(4)-E_(1))/(E_(4)-E_(m))=(1-(1)/(16))/((1)/(m^(2))-(1)/(16))=(1)/(5)` on solving m = 2 `lambda_(e ) = (12400xx4)/(13.6)=3647` `(K_(2))/(K_(1))=(1^(2))/(2^(2))=(1)/(4)` As kinetic energy is proportional to `(1)/(n^(2))` |
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| 82. |
Which of the following set represent correct formula for malachite, magnetite, Calamine & Cryolite ?A. `CuCO_(3),Fe_(2)O_(3),ZnO,Al_(2)O_(3)`B. `CuCO_(3).Cu(OH)_(2),Fe_(3)O_(4),ZnCO_(3),Na_(3)AlF_(6)`C. `CuCO_(3),Fe_(3)O_(4),ZnCO_(3),Al_(2)O_(3)`D. `CuCO_(3).Cu(OH)_(2),Fe_(2)O_(3),ZnCO_(3),Na_(3)AlF_(6)` |
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Answer» Correct Answer - B Malachite, `CuCO_(3).Cu(OH)_(2)` Magnetite, `Fe_(3)O_(4)` Calamine, `ZnCO_(3)` Cryolite, `Na_(3)AlF_(6)` |
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| 83. |
Which green coloured compound of chromium is formed in borax bead test ?A. `Cr(BO_(2))_(3)`B. `Cr_(2)O_(3)`C. `CrB`D. `CrBO_(3)` |
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Answer» Correct Answer - A `Na_(2)B_(4)O_(7).10H_(2)O overset(Delta)to NaB_(4)O_(7) overset(Delta)toNaBO_(2)+B_(2)O_(3)` `Cr_(2)O_(3)+B_(2)O_(3)overset(Delta)to underset("Green")(Cr(BO_(2))_(3))` |
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| 84. |
Among the following , the coloured compound isA. CuClB. `K_(3)[Cu(CN)_(4)]`C. `CuF_(2)`D. `[Cu(CH_(3)CN)_(4)]BF_(4)` |
| Answer» Correct Answer - C | |
| 85. |
In the following reactions sequences, the correct structures of E,F and G are ( * implies `.^(13)C` labelled carbon)A. B. C. D. |
| Answer» Correct Answer - C | |
| 86. |
The correct statement(s) concerning the structures E, F and G is/are A. E,Fand G ar resonance structruesB. E,F and E,G are tautomersC. F and G are geometrical isomersD. F and G are diasteromers |
| Answer» Correct Answer - B::C::D | |
| 87. |
The instananeous voltages at three terminals marked X,Y and Z are given by v `V_(Y)=V_(0)sin(omegat+(2pi)/(3))andV_(Z)=V_(0)sin(omegat+(4pi)/(3)).` An ideal volmeter is configured to read rms value of the potential difference between its terminal. It is connected between points X and Y and then between Y and Z. The reading(s) of the voltmeter will beA. `V_(XY)^(rm)=V_(0)sqrt((3)/(2))`B. `V_(XY)^(rm)=V_(0)sqrt((1)/(2))`C. `V_(XY)^(rm)=V_(0)`D. independent of the choice og the two terminals |
| Answer» Correct Answer - A::D | |
| 88. |
A vibrating string of certain length `l` under a tension `T` resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length `75cm` inside a tube closed at one end. The string also generates `4` beats per second when excited along with a tuning fork of frequency `n`. Now when the tension of the string is slightly increased the number of beats reduces `2` per second. Assuming the velocity of sound in air to be `340 m//s`, the frequency `n` of the tuning fork in `Hz` isA. 344B. 336C. 117.3D. 109.3 |
| Answer» Correct Answer - A | |
| 89. |
The x-t graph of a particle undergoing simple harmonic motion is shown below. The acceleration of the particle of `t=4//3s` is A. `(sqrt(3))/(32) pi^(2)cm//s^(2)`B. `(-pi^(2))/(32)cm//s^(2)`C. `(pi^(2))/(32)cm//s^(2)`D. `-(sqrt(3))/(32) pi^(2)cm//s^(2)` |
| Answer» Correct Answer - D | |
| 90. |
A uniform thin cylindrical disk of mass M and radius R is attaached to two identical massless springs of spring constatn k which are fixed to the wall as shown in the figure. The springs are attached to the axle of the disk symmetrically on either side at a distance d from its centre. The axle is massless and both the springs and the axle are in horizontal plane. the unstretched length of each spring is L. The disk is initially at its equilibrium position with its centre of mass (CM) at a distance L from the wall. The disk rolls without slipping with velocity `vecV_0 = vacV_0hati.` The coefficinet of friction is `mu.` The centre of mass of the disk undergoes simple harmonic motion with angular frequency `omega` equal to -A. `sqrt(k/M)`B. `sqrt(2k)/M`C. `sqrt(2k)/(3M)`D. `sqrt(4k)/(3M)` |
| Answer» Correct Answer - D | |
| 91. |
A uniform thin cylindrical disk of mass M and radius R is attaached to two identical massless springs of spring constatn k which are fixed to the wall as shown in the figure. The springs are attached to the axle of the disk symmetrically on either side at a distance d from its centre. The axle is massless and both the springs and the axle are in horizontal plane. the unstretched length of each spring is L. The disk is initially at its equilibrium position with its centre of mass (CM) at a distance L from the wall. The disk rolls without slipping with velocity `vecV_0 = vacV_0hati.` The coefficinet of friction is `mu.` The net external force acting on the disk when its centre of mass is at displacement x with respect to its equilibrium position is.A. `-kx`B. `-2kx`C. `-(2kx)/3`D. `-(4kx)/3` |
| Answer» Correct Answer - D | |
| 92. |
Copper is the most noble of first row transition metals and occurs in small deposits in serveral countries. Ores of copper include chalcanthite `(CuSO_(4).5H_(2)O)`, atacanite `[Cu_(2)Cl(OH)_(3)]`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)`, and malachite `[Cu_(2)(OH)_(2)CO_(3)]`. However, `80 %` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Partial roasting of chalcopyrite producesA. `Cu_2S` and FeOB. `Cu_(2)` and FeOC. CuS and `Fe_(2)O_(3)`D. `Cu_(2)O` and `Fe_(2)O_(3)` |
| Answer» Correct Answer - A | |
| 93. |
Statement I: Aniline on reaction with ` NaNO_2HCl` at `0^@C` followed by coupling with `beta`-naphthol gives a dark blue coloured precipitate. Statement II: The colour of the compound formed in the reaction of aniline with `NaNO_2//HCl` at ` 0^@C` followed by coupling with `beta`-naphthol is due to extended conjugation.A. Statement-1: is true, statement-2 is true, Statement-2 is a correct explanation for statement-1.B. Statement-1 is true, statement-2 is true, Statement-2 is not a correct explanation for Statement-2C. statement-1 is true, statement-2 is false.D. statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - D | |
| 94. |
The solubility product constant `(K_(sp))` of salts of types `MX, MX_(2)`, and `M_(3)X` at temperature `T` are `4.0 xx 10^(-8), 3.2 xx 10^(-14)`, and `2.7 xx 10^(-15)`, respectively. The solubilities of the salts at temperature `T` are in the orderA. `MX gt MX_(2) gt M_(3)X`B. `M_(3)X lt MX_(2) lt MX`C. `MX_(2) gt M_(3)X gt MX`D. `MX gt M_(3)X gt MX_(2)` |
| Answer» Correct Answer - D | |
| 95. |
Two non-conducting solid spheres of radii R and 2R, having uniform volume charge densities `rho_1` and `rho_2` respectively, touch each other. The net electric field at a distance 2R from the centre of the smaller sphere, along the line joining the centres of the spheres, is zero. The ratio `rho_1/rho_2` can beA. -4B. `-(32)/(25)`C. `(32)/(25)`D. 4 |
| Answer» Correct Answer - B::D | |
| 96. |
Statement-1 : In a Meter Bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance. Statement-2 : Resistance of metal increases with increase in temperature.A. STATEMENT-1 is True STATEMENT -2 is True STATEMENT -2 is True , STATEMENT -2 is a correct explanation for STATEMENT -1B. STATEMENT-1 is True STATEMENT -2 is True STATEMENT -2 is NOT a correct explanation for STATEMENT 1C. STATEMENT 1 is True STATEMENT 2 is FalseD. STATEMENT 1 is False STATEMENT 2 is True |
| Answer» Correct Answer - D | |
| 97. |
A sereis R-C circuit is connected to AC voltage source. Consider two cases, (A) when C is without a dielectric medium and (B) when C is filled with dielectric of constant 4. The current `I_(R)` through the resistor and voltage `V_(c)` across the capacitor are compared in the two cases. Which of the following is/ are true?A. `I_(R)^(A) gt I_(R)^(B)`B. `I_(R)^(A) lt I_(R)^(B)`C. `V_(C)^(A) gt V_(C)^(B)`D. `V_(C)^(A) gt V_(C)^(B)` |
| Answer» Correct Answer - B::C | |
| 98. |
Statement I The geometrical isomer of the complex `[M(NH)_(3))_(4)CI_(2)]` are optically inactive Satement II Both geometrical isomers of the complex `[M(NH_(3))_(4)CI_(2)]` possess axis of symmetry .A. Statement-1: is true, statement-2 is true, Statement-2 is a correct explanation for statement-1.B. Statement-1 is true, statement-2 is true, Statement-2 is not a correct explanation for Statement-4C. statement-1 is true, statement-2 is false.D. statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - B | |
| 99. |
Six point charges are kept at the vertices of a regular hexagon of side L and centre O, as shown in the figure. Given that `K=(1)/(4piepsilon_0)(q)/(L^2)`, which of the following statements(s) is (are) correct? A. The electric field at O is 6K along OD.B. The potential at O is zero.C. The potential at all points on the line PR is same.D. The potential at all points on the line ST is same. |
| Answer» Correct Answer - A::B::C | |
| 100. |
Three concentric metallic spherical shells of radii R, 2R, 3R are given charges `Q_(1) Q_(2) Q_(3)`, respectively. It is found that the surface charge densities on the outer surface of the shells are equal. Then, the ratio of the charges given to the shells `Q_(1) : Q_(2) : Q_(3)` isA. `1:2:3`B. `1:3:5`C. `1:4:5`D. `1:8:18` |
| Answer» Correct Answer - B | |