Saved Bookmarks
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. |
As the magnetic field strength increases, reluctance?(a) Increases(b) Decreases(c) Remains the same(d) Becomes zero |
|
Answer» The correct option is (a) Increases The best I can explain: Reluctance is directly proportional to the strength of the magnetic field, hence as the strength of magnetic field increases, the reluctance increases. |
|
| 2. |
The three lines meeting at a point and making an angle of 1200 with each other is called_________(a) isometric axes(b) axonometric(c) orthographic axes(d) oblique axes |
|
Answer» Right choice is (a) isometric axes Explanation: Isometric axes can be positioned in a number of ways to create different views of the same object. Figure 6(a) is a regular isometric, in which the viewpoint is looking down on the top of the object. In a regular isometric, the axes at 30° to the horizontal are drawn upward from the horizontal. In the reversed axis isometric, as shown in figure 6(b), the viewpoint is looking up on the bottom of the object, and the 30° axes are drawn downward from the horizontal. Figure 6(c) & (d) show the long axis isometric, where the viewpoint is looking from the right or from the left of the object, and one axis is drawn at 60 ° to the horizontal. While drawing the Isometric view, first the view point will have to be decided for obtaining the maximum technical information. |
|
| 3. |
If the gravitational potential due to the earth on its surface is assumed to be zero then gravitational potential at height 2Re from surface will be |
|
Answer» Potential at height 2R V= Gmm/(R+h) Solve and gate ans gR/3 |
|
| 4. |
Structure of atom |
|
Answer» Atoms are made up of particles called protons, neutrons, and electrons, which are responsible for the mass and charge of atoms. |
|
| 5. |
Enzymes are sensitive to |
|
Answer» Answer: Heat Enzymes are proteinaceous in nature. There are intra- and intermolecular bonds that hold proteins in their secondary and tertiary structures. The increase in the temperature over an optimum range leads to the disruption of bonds. This makes the enzymes sensitive to heat. Heat Enzymes are proteinaceous in nature. There are intra- and intermolecular bonds that hold proteins in their secondary and tertiary structures. The increase in the temperature over an optimum range leads to the disruption of bonds. This makes the enzymes sensitive to heat. ENZYMES ARE SENSITIVE TO pH |
|
| 6. |
the vapor density of a volatile chloride of metal is 59.5 and the equivalent mass of the metal is 24 .the atomic mass of the element will be |
|
Answer» :NOTE::::In the question eq mass of element is mentioned We know Molecular weight=2 * vapor density Eq wt*valency=2*vap density Now eq wt will be....eq wt of element+chlorine=24+35.5=59.5 Therefore, 59.5*valency=2*59.5 Val=2 Asked is atomic mass of elemen and eq wt of element is given we have done all the above for finding valency. Eq wt*Val=at wt 24*2 which comes to 48 |
|
| 7. |
Enzymes are polymers of |
|
Answer» Answer: Amino acids Enzymes are proteins which help to catalyze the biochemical reaction. The enzyme has a protein part which is not active is known as apoenzyme. The protein part is made up of amino acids which are linked by the peptide bonds. The enzymes lower the activation energy between product and substrate and due to which substrate changes into the product. |
|
| 8. |
The longest railway platforms is ______________(a) State Street subway, Chicago(b) Gorakhpur railway station, UP(c) Kharagpur, West Bengal(d) Kollam Junction, Kerala |
|
Answer» Correct option is (b) Gorakhpur railway station, UP The explanation: • Gorakhpur railway station, Uttar Pradesh, India:1,366.33 m (4,483 ft) (longest in the world). • Kollam Junction, Kerala, India:1,180.5 m (3,873 ft) • Kharagpur, West Bengal, India: 1,072.5 m (3,519 ft) • State Street subway, Chicago, Illinois, US: 1,067 m (3,501 ft) (longest in North America) • Bilaspur railway station, Chhattisgarh, India: 802 m (2,631 ft). |
|
| 9. |
Unit of reluctance is?(a) AWb(b) A^2/Wb(c) Wb/A(d) A/Wb |
|
Answer» The correct choice is (d) A/Wb Explanation: Reluctance is magnetomotive force per unit flux, So unit of reluctance = unit of MMF / unit of magnetic flux = A/Wb. |
|
| 10. |
Captopril is a/an |
|
Answer» Captopril belongs to a class of drugs called angiotensin-converting enzyme (ACE) inhibitors. A class of drugs is a group of medications that work in a similar way. These drugs are often used to treat similar conditions. Captopril works by opening your blood vessels. |
|
| 11. |
a shunt generator gives full load out put of 30 kw of a terminal voltage of 200 volt. The armature and shunt fild resistance are 0.05 ohm and 50 ohm respectively. the iron and friction losses are 1000 watt . calculate the generated emf, Cooper losses,effeciency |
|
Answer» Line current IL = 30*1000/200 = 300A If = 200/50 = 4A Armature current Ia = IL - If = 300-4 = 296A Induced EMF = V + IaRa =200 + 296*0.05 = 214.8V Copper losses = 0.05*296*296 = 4380 W Efficiency = Output power / input power +losses = 30*1000 / (30000+5380) = 85% |
|
| 12. |
Which of the following is also known as the dual of Norton’s theorem?(a) Thevenin’s theorem(b) Superposition theorem(c) Maximum power transfer theorem(d) Millman’s theorem |
|
Answer» The correct choice is (a) Thevenin’s theorem To explain: Thevenin’s theorem is also known as the dual of Norton’s theorem because in Norton’s theorem we find short circuit current which is the dual of open circuit voltage-what we find in Thevenin’s theorem. |
|
| 13. |
A curve defined by an equation x^2/a^2 + y^2/b^2 = 1 is known as ________(a) Ellipse(b) Directrix(c) Parabola(d) Hyperbola |
|
Answer» The correct choice is (a) Ellipse To explain: A plane curve such that the sums of the distances of each point in its periphery from two fixed points, the foci, are equal. It is a conic section formed by the intersection of a right circular cone by a plane that cuts the axis and the surface of the cone. |
|
| 14. |
Find the current in the 5 ohm resistance using Norton’s theorem.(a) 1A(b) 1.5A(c) 0.25A(d) 0.5A |
|
Answer» The correct option is (d) 0.5A To explain I would say: Shorting all voltage sources and opening all current sources we have: RN=(3||6)+10 = 12 ohm. Since the 5 ohm is the load resistance, we short it and find the resistance through the short. If we apply source transformation between the 6 ohm resistor and the 1A source, we get a 6V source in series with a 6 ohm resistor. Now we have two meshes. Let us consider I1 flowing in the first mesh and I2 flowing in the second mesh. The mesh equations are: 9I1-6I2=4 -6I1+16I2=6 On solving these equations simultaneously, we get I2=0.72A, which is the short circuit current. Connecting the current source in parallel to RN which is in turn connected in parallel to the load resistance=5ohm, we get Norton’s equivalent circuit. Using current divider: I = 0.72*12/(12+5) = 0.5 A. |
|
| 15. |
The locus of a point P moving in a plane about another point O in such a way that its distance from it is constant, is called _________(a) Arc(b) Angle(c) Circle(d) Perpendicular bisector |
|
Answer» Right choice is (c) Circle The explanation: According to locus postulate: The locus of a point P moving in a lane about another point in such a way that its distance from it is constant, is a circle of some radius. |
|
| 16. |
Reluctance is ________________ to the length of the material.(a) Directly proportional(b) Inversely proportional(c) Not related(d) Reluctance is ________________ to the length of the material. |
|
Answer» The correct option is (a) Directly proportional Easiest explanation: The formula for reluctance is: S = l/µ0 µr*A. From the formula, we can see that reluctance is directly proportional to the length of the material. |
|
| 17. |
In _________ the parallel projection rays are not perpendicular to the viewing plane as with orthographic projection, but strike the projection plane at an angle other than ninety degrees.(a) isometric projections(b) orthographic projections(c) axonometric projection(d) oblique projections |
|
Answer» Correct option is (d) oblique projections To explain: In both orthographic and oblique projection, parallel lines in space appear parallel on the projected image. Because of its simplicity, oblique projection is used exclusively for pictorial purposes rather than for formal, working drawings. In an oblique pictorial drawing, the displayed angles among the axes as well as the foreshortening factors (scale) are arbitrary. The distortion created thereby is usually attenuated by aligning one plane of the imaged object to be parallel with the plane of projection thereby creating a true shape, full-size image of the chosen plane. |
|
| 18. |
Calculate the total current in the circuit.(a) 20 A(b) 10 A(c) 11.43 A(d) 15 A |
|
Answer» Correct choice is (c) 11.43 A The best I can explain: The 1 ohm and 2 ohm resistor are in series which is in parallel to the 3 ohm resistor. The equivalent of these resistances (3/2 ohm) is in series with the 4 ohm and 5 ohm resistor. Total R = 21/2 ohm. I=V/R=120/(21/2)=240/21=11.43 A. |
|
| 19. |
What is the SI unit of mutual inductance?(a) Ohm(b) Henry(c) Volt(d) Siemens |
|
Answer» Right option is (b) Henry For explanation: Mutual inductance is the inductance between the two neighbouring coils. Since it is a type of inductance, its unit is that of inductance, that is, henry. |
|
| 20. |
If the intensity of the magnetic field is 100T, the length of the conductor is 10m and the magnitude of force perpendicular to the magnetic field is 10kN,calculate the current in the conductor.(a) 100 A(b) 100 mA(c) 10 A(d) 10 mA |
|
Answer» The correct choice is (c) 10 A The explanation: The formula for calculating the value of the force which is perpendicular to the magnetic field is: F=Bil Substituting the values from the question, we get i = 10A. |
|
| 21. |
Why does capacitor block dc signal at steady state?(a) due to high frequency of dc signal(b) due to zero frequency of dc signal(c) capacitor doesnot pass any current at steady state(d) due to zero frequency of dc signal |
|
Answer» The correct answer is (d) due to zero frequency of dc signal The explanation is: Frequency of dc signal is zero. So, Capacitive reactance XC=1/2πfc becomes infinite and capacitor behaves as open circuit for dc signal. Hence, capacitor block dc signal. |
|
| 22. |
Norton’s theorem is true for __________(a) Linear networks(b) Non-Linear networks(c) Both linear networks and nonlinear networks(d) Neither linear networks nor non-linear networks |
|
Answer» Correct choice is (a) Linear networks To explain: Norton’s theorem works for only linear circuit elements and not non-linear ones such as BJT, semiconductors etc. |
|
| 23. |
What is the value of the current I?(a) 8A(b) 7A(c) 6A(d) 5A |
|
Answer» Correct choice is (a) 8A Easy explanation: At the junction, I-2+3-4-5=0. Hence I=8A. |
|
| 24. |
Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at C will be?(a) Rac/(Rab+Rbc+Rca)(b) Rab/(Rab+Rbc+Rca)(c) Rbc*Rac/(Rab+Rbc+Rca)(d) Rab/(Rab+Rbc+Rca) |
|
Answer» The correct choice is (c) Rbc*Rac/(Rab+Rbc+Rca) The explanation is: When converting from delta to star, the resistances in star connection is equal to the product of the resistances it is connected to, divided by the total sum of the resistance. Hence Rac*Rbc/(Rab+Rbc+Rca). |
|
| 25. |
Find the value of the node voltage V.(a) -60V(b) 60V(c) 40V(d) -40V |
|
Answer» Right answer is (a) -60V Easy explanation: The node equation is: -2+8+V/10=0 => 6 + v/10 = 0 => v = -10*6 = -60V Solving this equation, we get V = -60V. |
|
| 26. |
The resistance of pure metals ___________(a) Increases with an increase in temperature(b) Decreases with an increase in temperature(c) Remains the same with an increase in temperature(d) Becomes zero with an increase in temperature |
|
Answer» Correct option is (a) Increases with an increase in temperature Easiest explanation: In a conductor, the valence band and conduction band overlap each other, there is an excess of electrons in the conduction band. When the temperature increases, there is an overcrowding of electrons in the conduction band hence reducing the mobility and hence resistance increases. |
|
| 27. |
Find Vx due to the 3A source.(a) 56V(b) 78V(c) 38V(d) 48V |
|
Answer» Right choice is (d) 48V The explanation: Due to the 3A source, we short the 16V and 10V source and open the 15A source. From the resulting circuit, we can use current divider to find the current in the 20 ohm branch and then multiply it with the resistance to find the voltage. I20 = 3*80/(20+80)=2.4A Vx=20*2.4=48V. |
|
| 28. |
Calculate the mesh currents.(a) 7A, 6A, 6.22A(b) 2A, 1A, 0.57A(c) 3A, 4A, 5.88A(d) 6A, 7A, 8.99A |
|
Answer» Correct answer is (b) 2A, 1A, 0.57A To explain: The two meshes which contain the 3A source, act as a supper mesh. The mesh equations are: I1-I3=-3 4I1-14I2+11I3=10 4I1-28I2+10I3=0 Solving these equations simultaneously, we get the three currents as I1=-1A, I2=0.57A, I3=2A So currents are 2A, 1A, 0.57A. |
|
| 29. |
Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at B will be?(a) Rac/(Rab+Rbc+Rca)(b) Rab/(Rab+Rbc+Rca)(c) Rbc*Rab/(Rab+Rbc+Rca)(d) Rab/(Rab+Rbc+Rca) |
|
Answer» Correct option is (c) Rbc*Rab/(Rab+Rbc+Rca) The explanation is: When converting from delta to star, the resistances in star connection is equal to the product of the resistances it is connected to, divided by the total sum of the resistance. Hence Rab*Rbc/(Rab+Rbc+Rca). |
|
| 30. |
Calculate the total capacitance.(a) 10F(b) 15F(c) 13F(d) 20F |
|
Answer» Right option is (c) 13F For explanation: The equivalent capacitance when capacitors are connected in parallel is the sum of all the capacitors = 1+2+10 = 13F. |
|
| 31. |
A wire having an area of cross section = 10sqm and another wire having an area of cross section= 15sqm, have the same length and are made up of the same material. Which wire has more resistance?(a) Both have equal resistance(b) The 10sqm wire has higher resistance(c) The 15sqm wire has higher resistance(d) The value of resistance cannot be determined from the given data |
|
Answer» Correct option is (b) The 10sqm wire has higher resistance To elaborate: Resistance is inversely proportional to the area of cross-section. As an area of cross-section increases, resistance decreases. Hence the 10sqm wire has a higher resistance than the 15sqm wire. |
|
| 32. |
Find the node voltage V.(a) 1V(b) 2V(c) 3V(d) 4V |
|
Answer» Correct answer is (d) 4V The best explanation: The nodal equation is: (V-10)/2+(V-7)/3+V/1=0 Solving for V, we get V=4V. |
|
| 33. |
Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back?(a) Equal to10kJ(b) Less than 10kJ(c) More than 10kJ(d) Zero |
|
Answer» The correct choice is (b) Less than 10kJ Easiest explanation: Practically, if 10kJ of energy is supplied to a system, it returns less than the supplied energy because, some of the energy is lost as heat energy, sound energy etc. |
|
| 34. |
What will the value of the current be once source transformation is applied to the circuit?(a) 10A(b) 20A(c) 30A(d) 40A |
|
Answer» Right answer is (a) 10A Explanation: Using ohm’s law, we can use the relation: V=IR. Thus I=V/R. I=220/22=10A. |
|
| 35. |
If 2V is supplied to a 3F capacitor, calculate the charge stored in the capacitor.(a) 1.5C(b) 6C(c) 2C(d) 3C |
|
Answer» Right option is (b) 6C The 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=3*2=6C. |
|
| 36. |
Mesh analysis employs the method of ___________(a) KVL(b) KCL(c) Both KVL and KCL(d) Neither KVL nor KCL |
|
Answer» Correct choice is (a) KVL The best explanation: KVL employs mesh analysis to find the different mesh currents by finding the IR products in each mesh. |
|
| 37. |
Calculate the voltage across AB if the total charge stored in the combination is 13C.(a) 1V(b) 2V(c) 3V(d) 4V |
|
Answer» Right answer is (a) 1V The best explanation: The equivalent capacitance when capacitors are connected in parallel is the sum of all the capacitors = 1+2+10 = 13F. V = Q/C = 13/13 = 1V. |
|
| 38. |
Mesh analysis is generally used to determine _________(a) Voltage(b) Current(c) Resistance(d) Power |
|
Answer» Right choice is (b) Current The explanation: Mesh analysis uses Kirchhoff’s Voltage Law to find all the mesh currents. Hence it is a method used to determine current. |
|
| 39. |
Mesh analysis can be used for __________(a) Planar circuits(b) Non-planar circuits(c) Both planar and non-planar circuits(d) Neither planar nor non-planar circuits |
|
Answer» Right option is (a) Planar circuits Explanation: If the circuit is not planar, the meshes are not clearly defined. In planar circuits, it is easy to draw the meshes hence the meshes are clearly defined. |
|
| 40. |
Thevenin resistance is found by ________(a) Shorting all voltage sources(b) Opening all current sources(c) Shorting all voltage sources and opening all current sources(d) Opening all voltage sources and shorting all current sources |
|
Answer» Correct option is (c) Shorting all voltage sources and opening all current sources To elaborate: Ideal current sources have infinite internal resistance hence behave like an open circuit whereas ideal voltage sources have zero internal resistance hence behave as a short circuit. |
|
| 41. |
The development of cylinder is a _______(a) triangle(b) rectangle(c) square(d) trapezium |
|
Answer» Correct choice is (b) rectangle Explanation: The figure above shows the development of a truncated rectangular prism. Step 1: Draw the stretch-out line in the front view, along the base of the prism and equal in length to the perimeter of the prism. Locate the fold lines on the pattern along the stretch-out line equal in length to the sides of the prism, 1-2, 2-3, 3-4, and 4-1. Draw perpendicular construction lines at each of these points. Project the points 1, 2, 3, and 4 from the front view Step 2: Darken lines 1-2-3 and 4-1. Construct the bottom and top, as shown and add the seam to one end of the development and the top and bottom. |
|
| 42. |
Calculate the capacitance of a capacitor that stores 40microC of charge and has a voltage of 2V.(a) 20F(b) 20microF(c) 10F(d) 10microF |
|
Answer» Right option is (b) 20microF To elaborate: Q is directly proportional to V. The constant of proportionality in this case is C, that is, the capacitance. Hence C=Q/V. C=40microC/2V=20microF. |
|
| 43. |
What is the value of capacitance of a capacitor which has a voltage of 4V and has 16C of charge?(a) 2F(b) 4F(c) 6F(d) 8F |
|
Answer» Right option is (b) 4F To elaborate: Q is directly proportional to V. The constant of proportionality in this case is C, that is, the capacitance. Hence Q=CV. From the relation, C=Q/V= 16/4=4F. |
|
| 44. |
Calculate Eth.(a) 3.43V(b) 4.57V(c) 3.23V(d) 5.34V |
|
Answer» Correct answer is (b) 4.57V To elaborate: The two nodal equations are: (VA-10)/3+VA/2=0 (VB-20)/4+VB/3=0 On solving the two equations, we get VA=4V, VB=8.571V. VAB = VA-VB = 4V – 8.571V = -4.57V. Eth = 4.57V. |
|
| 45. |
It is preferable to connect bulbs in series or in parallel?(a) Series(b) Parallel(c) Both series and parallel(d) Neither series nor parallel |
|
Answer» Correct choice is (b) Parallel The best I can explain: Bulbs are connected in parallel so that even if one of the bulbs blow out, the others continue to get a current supply. |
|
| 46. |
Nodal analysis is generally used to determine______(a) Voltage(b) Current(c) Resistance(d) Power |
|
Answer» Correct option is (a) Voltage Explanation: Nodal analysis uses Kirchhoff’s Current Law to find all the node voltages. Hence it is a method used to determine the voltage. |
|
| 47. |
Nodal analysis is generally used to determine_______(a) Voltage(b) Current(c) Resistance(d) Power |
|
Answer» The correct option is (a) Voltage The explanation is: Nodal analysis uses Kirchhoff’s Current Law to find all the node voltages. Hence it is a method used to determine the voltage. |
|
| 48. |
What should theta be in order to get maximum emf?(a) 0^0(b) 90^0(c) 180^0(d) 45^0 |
|
Answer» Correct answer is (b) 90^0 Easy explanation: The value of θ should be 90^0 in order to get maximum emf because e = Blvsin(θ) and sin is maximum when θ is 90^0. |
|
| 49. |
Which among the following equations is incorrect?(a) Q=CV(b) Q=C/V(c) V=Q/C(d) C=Q/V |
|
Answer» Right answer is (b) Q=C/V Best explanation: Q is directly proportional to V. The constant of proportionality in this case is C, that is, the capacitance. Hence Q=CV. From the given relation we can derive all the equations except for Q=C/V. |
|
| 50. |
What is the value of capacitance of a capacitor which has a voltage of 4V and ha 8C of charge?(a) 2F(b) 4F(c) 6F(d) 8F |
|
Answer» Correct choice is (a) 2F The best explanation: Q is directly proportional to V. The constant of proportionality in this case is C, that is, the capacitance. Hence Q=CV. From the relation, C=Q/V= 8/4=2F. |
|