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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What happens to the inductance when the magnetic field strength decreases?(a) Increases(b) Decreases(c) Remains the same(d) Becomes zero |
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Answer» Right option is (b) Decreases For explanation: Inductance is directly proportional to the magnetic field strength in the coil, hence as the magnetic field strength decreases, inductance decreases. |
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| 2. |
If the measurement required is in three units, which scale would you prefer?(a) Plain(b) Comparative(c) Diagonal(d) Vernier |
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Answer» Right choice is (c) Diagonal Easiest explanation: Diagonal scales are used when very minute distances such as 0.1 mm etc. are to be accurately measured or when measurements are required in three units; example- dm, cm and mm, or yard, foot and inch. While other options only give measurement in single unit. |
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| 3. |
Two 4F capacitors are connected in series, calculate the voltage across each if the total voltage is 20V.(a) 10V(b) 5V(c) 20V(d) 0V |
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Answer» Right option is (a) 10V Easiest explanation: The two capacitors have the same capacitance, hence the voltage gets divides equally. V across each=Total voltage/2 = 20/2 = 10V. |
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| 4. |
If a coil is wound around a steel core and electric current is passed through the coil, the steel core acts as a?(a) Electromagnet(b) Permanent magnet(c) Neither electromagnet nor permanent magnet(d) Either electromagnet or permanent magnet |
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Answer» Right answer is (b) Permanent magnet The best explanation: When a coil is wound around a steel core, the steel core behaves like a permanent magnet because it is a ferromagnetic material and once it becomes magnetic it does not lose its magnetic property. |
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| 5. |
If tan ϕ = 10 and the resistance is 2 ohm, calculate the inductive reactance.(a) 10 ohm(b) 20 ohm(c) 30 ohm(d) 40 ohm |
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Answer» The correct choice is (b) 20 ohm The explanation is: We know that: tan(ϕ)=XL/R From the given question, we find that the inductive reactance is 20 ohm. |
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| 6. |
Magnetic field at a point d distance away from long wire due to electric current i in it is ____________(a) µ0i/2r(b) µ0i/r(c) µ0i/2πr(d) µ0i/πr |
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Answer» The correct choice is (c) µ0i/2πr The explanation: Magnetic field at distance d from long wire with carrying current i is given by- B = µ0i/2πr. |
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| 7. |
The conventional direction of electric field is ________(a) Positive to negative(b) Negative to positive(c) No specific direction(d) Direction cannot be determined |
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Answer» Correct option is (a) Positive to negative To explain: The conventional direction of field lines is from positive to negative. The field lines originate at the positive charge and terminate at the negative charge. |
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| 8. |
The locus of a point equidistant from two fixed points A and B in the same plane, is the called ___________(a) Straight line(b) Angle(c) Circle(d) Perpendicular bisector |
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Answer» Right option is (d) Perpendicular bisector Explanation: According to locus postulate: The locus of a point equidistant from two fixed points A and B in the same plane, is the perpendicular bisector of the line joining the two points. |
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| 9. |
What happens to the frequency if the number of pairs of poles increases?(a) Increases(b) Decreases(c) Remains the same(d) Becomes zero |
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Answer» Right answer is (a) Increases To explain: We know that: f=p*n, therefore, as p increases, f also increases. Hence frequency increases if number of pair of poles increases. |
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| 10. |
Find the number of plates in the multi plate capacitor having C=20F absolute permittivity=5F/m, A=4m^2 and d=2m.(a) 1(b) 2(c) 3(d) 4 |
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Answer» The correct answer is (c) 3 Best explanation: The formula for capacitance of a multi plate capacitor: C=Actual permittivity*(n-1)*A/d. Substituting the given values in the equation, we get n=3. |
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| 11. |
Planes are formed when any three _________ points are joined.(a) non-collinear(b) collinear(c) concentric(d) eccentric |
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Answer» Right answer is (a) non-collinear The best explanation: A plane is as two dimensional surface having length and breadth with negligible thickness. They are formed when any three non-collinear points are joined. Planes are bounded by straight/curved lines and may be either regular or an irregular. Regular plane surface are in which all the sides are equal. Irregular plane surface are in which the lengths of the sides are unequal. |
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| 12. |
What happens to relative permittivity when actual permittivity decreases?(a) Increases(b) Decreases(c) Remains the same(d) Becomes zero |
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Answer» Correct choice is (b) Decreases To explain I would say: Relative permittivity is the ratio of actual permittivity to the absolute permittivity. Relative permittivity is directly proportional to actual permittivity. Hence, as actual permittivity decreases, relative permittivity also decreases. |
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| 13. |
The locus of a point equidistant from two fixed non-parallel straight line AB and CD is known as _______________(a) Straight line(b) Angular bisector(c) Circle(d) Perpendicular bisector |
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Answer» Correct choice is (b) Angular bisector Easiest explanation: According to locus postulate: The locus of a point equidistant from two fixed non-parallel straight lines AB and CD will be a straight line bisecting the angle between them. |
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| 14. |
Calculate the actual permittivity of a medium whose relative permittivity is 5.(a) 4.43*10^-11F/m(b) 4.43*10^-12F/m(c) 4.43*10^11F/m(d) 4.43*10^12F/m |
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Answer» Right option is (a) 4.43*10^-11F/m Best explanation: Actual permittivity = Relative permittivity*absolute permittivity. Actual permittivity = 5*8.85*10^-12 = 4.43*10^-11F/m. |
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| 15. |
What is the relative permittivity when the actual permittivity is 4F/m?(a) 4.57*10^-11(b) 4.57*10^12(c) 4.57*10^11(d) 4.57*10^-12 |
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Answer» Right choice is (c) 4.57*10^11 The explanation: Relative permittivity= Actual permittivity/ Absolute permittivity. Relative permittivity = 4/(8.85*10^-12) = 4.57*10^11. |
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| 16. |
The figure below represents octagonal structure.(a) True(b) FalseI got this question in a job interview.The query is from Circular, Semicircular, Hexagonal & Half Hexagonal Rooms in portion Methods of Building Estimate & Estimate of Building of Civil Engineering Drawing |
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Answer» Right option is (b) False To elaborate: In geometry, an octagon (“eight angles”) is an eight-sided polygon or 8-gon. A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, which alternates two types of edges. |
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| 17. |
The value of ‘C’ of Indian type W.C. shown in the given figure is _________(a) 400 mm(b) 550 mm(c) 250 mm(d) 500 mm |
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Answer» Right answer is (d) 500 mm To explain I would say: We have mostly two types of commodes in our society. One is called WC and other is called Indian commode (in which you have to sit like wicket keeper sits when bowler is bowling). WC or Wc commonly refers to a Water toilet (i.e. a flush toilet). It may also refer to Winston Churchill. |
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| 18. |
What is the voltage across the inductor at t=0?(a) 0V(b) 20V(c) 60V(d) 58V |
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Answer» Right option is (c) 60V Easiest explanation: Initially, when the switch is open, the current in the circuit is 0. As soon as the switch is closes at t=0+, the inductor acts as an open circuit, hence the current in the circuit is zero. Since the current in the circuit is zero, there is no voltage drop across the resistor and the voltage across the inductor is equal to the supply voltage, which is equal to 60V. |
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| 19. |
The method by which the development of surface of an oblique solid is obtained __________(a) radial line(b) parallel line(c) triangulation(d) approximation |
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Answer» The correct answer is (c) triangulation The explanation is: In this method, the lateral surfaces of the transition pieces are divided in to a number of triangles. By finding the true lengths of the sides of each triangle, the development is drawn by laying each one of the triangles in their true shapes adjoining each other. |
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| 20. |
In 2010, about __________ of the global population had access to piped water supply through house connections or to an improved water source through other means than house, including standpipes, water kiosks, spring supplies and protected wells.(a) 90%(b) 55%(c) 87%(d) 65% |
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Answer» Right answer is (c) 87% To explain: In 2010, about 87% of the global population (5.9 billion people) had access to piped water supply through house connections or to an improved water source through other means than house, including standpipes, water kiosks, spring supplies and protected wells. However, about 13% (about 900 million people) did not have access to an improved water source and had to use unprotected wells or springs, canals, lakes or rivers for their water needs. |
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| 21. |
The value of ‘B’ of Indian type W.C. shown in the given figure is?(a) 60 cm(b) 45 cm(c) 25 cm(d) 15 cm |
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Answer» Right choice is (b) 45 cm Easiest explanation: A flush toilet may be colloquially called a lavatory, water closet (abbreviated W.C.), loo, comfort room (abbreviated C.R.), and many other names. A flush toilet is a toilet that disposes of human excreta (urine and feces) by using water to flush it through a drainpipe to another location for disposal, thus maintaining a separation between humans and their excreta. Flush toilets can be designed for sitting (in which case they are also called “Western” toilets) or for squatting, in the case of squat toilets. The opposite of a flush toilet is a dry, which uses no water for flushing. |
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| 22. |
A 4microF capacitor is charged to 120V, the charge in the capacitor would be?(a) 480C(b) 480microC(c) 30C(d) 30microC |
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Answer» Correct answer is (b) 480microC Best explanation: Q is directly proportional to V. The constant of proportionality in this case is C, that is, the capacitance. Hence Q=CV. Q=4*120=480microC. |
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| 23. |
What is Helmholtz equation?(a) i=I(e^Rt/L)(b) i=I(1-e^-Rt/L)(c) i=I(1+e^-Rt/L)(d) i=I(e^-Rt/L) |
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Answer» The correct answer is (b) i=I(1-e^-Rt/L) For explanation: Helmholtz equation is an equation which gives the formula for the growth in an inductive circuit. Hence the Helmholtz formula is: i=I(1-e^-Rt/L). |
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| 24. |
What will happen to the capacitor just after the source is removed?(a) It will not remain in its charged state(b) It will remain in its charged state(c) It will start discharging(d) It will become zero |
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Answer» Right choice is (b) It will remain in its charged state Easy explanation: As soon as the source is removed, the capacitor does not start discharging it remains in the same charged state. |
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| 25. |
Which command converts discrete object in polyline?(a) Merge(b) Union(c) Join(d) Add |
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Answer» Correct option is (c) Join To elaborate: Some reasons you may choose to use polylines include the following: • Vertices remain joined even after grip editing • Absolute line width (as an alternative to relative line weight) that can be constant or tapered across a segment • Move and copy a polyline as a unit • Easily create rectangles and polygons as single objects • Smart application of non-continuous line types across vertices • Easy extrusion for 3D solids in AutoCAD. |
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| 26. |
Find the value of ω if the frequency is 5Hz?(a) 3.14 rad/s(b) 31.4 rad/s(c) 34 rad/s(d) 341 rad/s |
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Answer» Correct option is (b) 31.4 rad/s The best explanation: The expression for ω is ω=2*π*f. Substituting the value of f from the question, we get ω=31.4 rad/s. |
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| 27. |
Find the total current in the circuit if two currents of 4+5j flow in the circuit.(a) 4+5j A(b) 4A(c) 5A(d) 8+10j A |
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Answer» Right answer is (d) 8+10j A The explanation: The total current in the circuit is the sum of the two currents where we add the real parts and imaginary parts separately. Therefore, Itotal= 8+10j A. |
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| 28. |
In jet propulsion of ships, when the inlet orifices are at right angles to the direction of motion of the ships, the efficiency of propulsion η is(a) \(\cfrac{2u^2}{V+u}\) (b) \(\cfrac{2Vu}{(V+u)^2}\) (c) \(\cfrac{2u}{(V+u)^2}\) (d) \(\cfrac{2Vu}{V+u}\) where; V = Absolute velocity of the issuing jet, u = Velocity of the moving ship |
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Answer» Correct option is (b) \(\cfrac{2Vu}{(V+u)^2}\) |
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| 29. |
Which of the following is an incorrect statement?(a) The functions of frontal region are Behaviour, intelligence, memory and movement. (b) The functions of parietal region is intelligence and memory. (c) The functions of temporal region are speech, hearing and memory. (d) The functions of occipital region is visual processing. |
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Answer» (b) The functions of parietal region is intelligence and memory. |
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| 30. |
Synovial fluid is present in ……………(a) Spinal cavity (b) Cranial activity (c) Freely movable joints (d) Fixed joints |
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Answer» (c) Freely movable joints |
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| 31. |
Four friends born between (1991 – 99) meets at 2020. The ratio of sum of age of two oldest guys: Sum of age two youngest guys is 9 ∶ 8. Again when they meet at 2030, the ratio of (sum age of youngest + oldest) and (sum of ages of other two) is 1 ∶ 1. What is the sum of the age of the third youngest guy and second youngest guy in the year 2020? (in years)1. 512. 523. 534. 545. 55 |
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Answer» Correct Answer - Option 1 : 51 If all the 4 people were born between 1991 – 99, their ages at 2020 should be in the range 21 – 29 By year 2020 Let the age of the guys (from youngest to oldest) in the year 2020 be p, q, r and s respectively Let sum of ages of two oldest guys and sum of ages two youngest guys be 9a and 8a respectively 9a and 8a should lie between 42 – 58 (Because sum of two people) Only such value is possible when a = 6 Sum of ages of two youngest = p + q = 48 ---- 1 Sum of ages of two oldest = r + s = 54 ---- 2 By the year 2030 Their ages will be p + 10, q + 10, r + 10 and s + 10 Sum of ages of oldest + youngest: Sum of ages of other two guys = 1 ∶ 1 ⇒ p + s + 20 = q + r + 20 ∴ p + s = q + r Equation 1 + Equation 2 ⇒ p + s + q + r = 102 ⇒ 2 × (q + r) = 102 ⇒ q + r = 51 years ∴ The sum of the age of the third youngest guy and second youngest guy in the year 2020 is 51 years. |
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| 32. |
Three students performed the following reactions for the verification of the law of conservation of mass(A) added barium chloride solution to sodium sulphate solution in the flask and closed the flask with a cork(B) heated lead nitrate in a boiling test tube(C) added lead nitrate solution to the sodium chloride solution in a flask and closed the flask with a corkWhich students is not likely to get the correct result and why???? |
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Answer» B) heated lead nitrate in a boiling test tube is not likely to get the correct result. Brown coloured fumes of NO2 gas are evolved and colour of the residue left behind is brown. It is a decomposition reaction |
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| 33. |
Which base, ammonia (NH3) or triethylamine [(CH3CH2)3N], would be more effective to use for the following conversion? |
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Answer» Triethylamine. Amines can be nucleophiles or bases. Increasing their steric bulk near the nitrogen atom diminishes their nucleophilicity while retaining the basicity. Since the substrate is sterically accessible to nucleophilic attack, a bulky base is needed to promote elimination. |
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| 34. |
How many electron in outer most orbit of He atom ?(A) 1 (B) 2(C) 3 (D) 4 |
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Answer» 2 electron in outer most orbit of He atom. |
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| 35. |
What is carbon ?(A) Metal (B) Non metal(C) Metaloid (D) None of these |
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Answer» Carbon is Non-metal. |
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| 36. |
Which of the following ore is copper ?(A) Cuprite (B) Boxite(C) Cinebar (D) Calamine |
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Answer» Cuprite ore is copper. |
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| 37. |
Which of the following metal is react with both acid and base.(A) Cu (B) Ag(C) Fe (D) Zn |
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Answer» Zn metal is react with both acid and base. |
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| 38. |
Which of the following is weak acid ?(A) HCl (B) HNO3(C) H2SO4 (D) CH3COOH |
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Answer» CH3COOH is weak acid. |
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| 39. |
In which type of reaction in corrosion ?(A) Reduction (B) Precipitation(C) Combination (D) Oxidation |
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Answer» Type of reaction in corrosion is Oxidation. |
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| 40. |
Which of the following is reducing agent ?(A) H2 (B) CO(C) O2 (D) H2S |
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Answer» H2 is reducing agent. |
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| 41. |
Who reported industrial melanism and in which organism? |
| Answer» Kettlewell reported industrial melanism in peppered moths called Biston betularia. | |
| 42. |
What are fossil mould and fossil cast? |
| Answer» Fossil mould is an impression of the body parts left on the soft mud of the oceanic floor while the fossil cast is the cavity of mould that is filled with minerals. | |
| 43. |
A conducting ring of radius 1m is placed in a uniform magnetic field B of 0.001T oscillating with frequency 100hz with its plane at right angles to B . What will be the induced emfAns 2v/m |
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Answer» As frequency is given i.e. 100 Hz I think 0.1 V/m is the correct answer. |
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| 44. |
Human blood clotting factor VIII is used to treat __________. (A) pituitary dwarfism (B) diabetes mellitus (C) haemophilliacs (D) cystic fibrosis |
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Answer» (C) haemophilliacs |
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| 45. |
In which of the following disorders number of chromosomes present is 47? (A) Turner’s syndrome (B) Cushing’s syndrome (C) Acquired Immuno - Deficiency Syndrome (D) Down’s syndrome |
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Answer» (D) Down’s syndrome |
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| 46. |
When a circular coil of radius 1m and 100turns is rotated in a horizontal uniform magnetic field, the peak value of emf. Induced is 100v. The coil is unwound and the rewound into circular coil of radius 2m. If it is rotated , now with the same speed, under similar conditions, the new peak value of emf developed isAns- 200v |
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Answer» A coil having N turns and area A rotates in a uniform magnetic field B with angular velocity ω, Now the fact is that the area of the coil in the 2nd case is 4A since the radius is doubled. But the number of turns will be N/2 in the second case since the length of the wire required for a turn is doubled. If V1 and V2 are the peak values of the emf in the two cases, We have V1/V2 = 100 /V2 = NABω / [(N/2)×(4A)Bω] |
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| 47. |
Suresh has got the 1 rank in NEET exam. He shares his joy with his friend Nikhil who has got the 2’d rank In CET. Write a dialogue between them. |
Answer»
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| 48. |
You really should throw out most of this stuff. A) track B) tame C) trash |
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Answer» Correct option is C) trash (c) Trash I hove the answer is correct. |
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| 49. |
Neet 2018 solved |
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Answer» Here you will find all the NEET 2018 questions with solutions. https://bit.ly/2RnlMx3 |
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| 50. |
Answer the following: a. Name the reaction for the conversion of sugar solution into ethanol. b. Which enzymes are used in this reaction c. Chemical involved in grape spirit. d. Name the monomer of P VC. e. Products formed during cracking of propane. |
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Answer» a. Fermentation b. Invertase, Zymase c. Ethanol (CH3 – CH2 OH) d. Polyvinyl chloride (CH2 = CH – Cl) e. Ethene(CH2 = CH2), Methane (CH4) |
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