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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.
| 1251. |
Consider the situation given in the figure, when the card is flicked with the finger. What happens to the coin? |
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Answer» Consider the situation given in the figure, when the card is flicked with the finger. What happens to the coin?
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| 1252. |
9.Find the net current I flowing branch CD in the circuit diagram below |
| Answer» 9.Find the net current I flowing branch CD in the circuit diagram below | |
| 1253. |
Why does the mirror appear to be a lake in the second stanza? What aspect of the mirror do you think is being referred to here? |
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| 1254. |
Derive mirror formula when object is placed b/w (1) pole P and principal focus f in a concave mirror (2)in convex mirror |
| Answer» Derive mirror formula when object is placed b/w (1) pole P and principal focus f in a concave mirror (2)in convex mirror | |
| 1255. |
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?(a) A convex lens of focal length 50 cm(b) A concave lens of focal length 50 cm(c) A convex lens of focal length 5 cm(d) A concave lens of focal length 5 cm |
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Answer» Which of the following lenses would you prefer to use while reading small letters found in a dictionary? (a) A convex lens of focal length 50 cm (b) A concave lens of focal length 50 cm (c) A convex lens of focal length 5 cm (d) A concave lens of focal length 5 cm |
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| 1256. |
81.A bullet when passes through a wooden block losses 1/20 part of it's velocity u,then how many planks are required to stop the bullet (assuming constant retardation).length of a wooden plank is s. |
| Answer» 81.A bullet when passes through a wooden block losses 1/20 part of it's velocity u,then how many planks are required to stop the bullet (assuming constant retardation).length of a wooden plank is s. | |
| 1257. |
Question 7In the arrangement shown in figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then(a) the deflection in the galvanometer remains zero throughout(b) there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the key is removed(c) there are momentary galvanometer deflections that die out shortly; the deflections are in the same direction(d) there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions |
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Answer» Question 7 |
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| 1258. |
A plano-convex thin lens of focal length 10 cm is silvered at its plane surface. The distance d at which an object must be kept in order to get its image on itself is |
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Answer» A plano-convex thin lens of focal length 10 cm is silvered at its plane surface. The distance d at which an object must be kept in order to get its image on itself is |
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| 1259. |
Q.14 a solenoid contains 6000 turns and its self inductance is 108mH .the self inductance of an identical solenoid containing 5000 turns will be |
| Answer» Q.14 a solenoid contains 6000 turns and its self inductance is 108mH .the self inductance of an identical solenoid containing 5000 turns will be | |
| 1260. |
In a full wave rectifier |
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Answer» In a full wave rectifier |
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| 1261. |
33 Why we not find the value of G(free energy)? |
| Answer» 33 Why we not find the value of G(free energy)? | |
| 1262. |
(a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m. List two possible reasons due to which this defect of vision may have arisen. With the help of a ray diagram, explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) Which type of corrective lens is used to restore proper vision and how this defect is corrected by the use of this lens? (b) If, in this case, the numerical value of the focal length of the corrective lens is 5 m, find the power of the lens as per the new cartesian sign convention. |
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Answer» (a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5m. List two possible reasons due to which this defect of vision may have arisen. With the help of a ray diagram, explain. (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) Which type of corrective lens is used to restore proper vision and how this defect is corrected by the use of this lens? (b) If, in this case, the numerical value of the focal length of the corrective lens is 5 m, find the power of the lens as per the new cartesian sign convention. |
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| 1263. |
How to convert sec into year in case of solving numericals of nuclear fission |
| Answer» How to convert sec into year in case of solving numericals of nuclear fission | |
| 1264. |
A galvanorneter of resistance G is converted into a voltmeter of range 0−1 V by connecting a resistance R1 in series with it. The additional resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0−2 V wìll be: |
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Answer» A galvanorneter of resistance G is converted into a voltmeter of range 0−1 V by connecting a resistance R1 in series with it. The additional resistance R1 in series with it. The additional resistance that should be connected in series with R1 to increase the range of the voltmeter to 0−2 V wìll be: |
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| 1265. |
Why do charges tend to be at the surface of conductor and dense at the pointed ends? |
| Answer» Why do charges tend to be at the surface of conductor and dense at the pointed ends? | |
| 1266. |
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads : Left eye : + 2.50 D Right eye : + 2.00 D (a) State whether these lenses are thicker in the middle or at the edges. (b) Which lens bends the light rays more strongly ? (c) State whether these spectacle lenses will converge light rays or diverge light rays. |
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Answer» A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads : Left eye : + 2.50 D Right eye : + 2.00 D (a) State whether these lenses are thicker in the middle or at the edges. (b) Which lens bends the light rays more strongly ? (c) State whether these spectacle lenses will converge light rays or diverge light rays. |
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| 1267. |
15. Deduce Ohm's law from elementary concept . |
| Answer» 15. Deduce Ohm's law from elementary concept . | |
| 1268. |
86.Work function of Zn is 3.74eV. If the sphere of Zn is illuminated by the X rays of wavelength 12angstroms,find the maximum potential production on the sphere ,h =6.625\ast10^{-34} Js |
| Answer» 86.Work function of Zn is 3.74eV. If the sphere of Zn is illuminated by the X rays of wavelength 12angstroms,find the maximum potential production on the sphere ,h =6.625\ast10^{-34} Js | |
| 1269. |
Match the pairs‘A’ Group ‘B’ Group1. Free electrons a. V/ R2. Current b. Increases the resistance in the circuit3. Resistivity c. Weakly attached4. Resistances in d. VA/LIseries |
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Answer» Match the pairs ‘A’ Group ‘B’ Group 1. Free electrons a. V/ R 2. Current b. Increases the resistance in the circuit 3. Resistivity c. Weakly attached 4. Resistances in d. VA/LI series
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| 1270. |
Why does a compass needle get deflected when brought near a bar magnet? |
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Answer» Why does a compass needle get deflected when brought near a bar magnet? |
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| 1271. |
What do you think the 'terrible fish' in the last line symbolizes? What is the poetic device used here? |
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| 1272. |
We know that there are many advantages associated with using hydel power generation but still governments face lots of challenges. what could be possible challenges among following? |
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Answer» We know that there are many advantages associated with using hydel power generation but still governments face lots of challenges. what could be possible challenges among following? |
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| 1273. |
The radius of a circular loop is 0.4m and the current is 12A. What is the magnitude of magnetic field at the centre of the loop? [Given μ0=4π×10−7Tm/A] |
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Answer» The radius of a circular loop is 0.4m and the current is 12A. What is the magnitude of magnetic field at the centre of the loop? [Given μ0=4π×10−7Tm/A] |
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| 1274. |
the radioactive C having mass no. 11 and atomic no. 6 decays by β^+ emission. write symbolically this decay process. given that m of C^{11}having atomic no. 6=11.011434u ,m of B^{11}having atomic no.6=11.009305u ,m_e=0.000548u Calculate the Q value . |
| Answer» the radioactive C having mass no. 11 and atomic no. 6 decays by β^+ emission. write symbolically this decay process. given that m of C^{11}having atomic no. 6=11.011434u ,m of B^{11}having atomic no.6=11.009305u ,m_e=0.000548u Calculate the Q value . | |
| 1275. |
How are fossil fuels formed ? |
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Answer» How are fossil fuels formed ? |
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| 1276. |
A point source of light S is placed in front of a perfectly reflecting mirror as shown in the figure. S′ is a screen. The intensity at the centre of the screen is found to be I. If the mirror is removed, then the intensity at the centre of the screen would be |
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Answer» A point source of light S is placed in front of a perfectly reflecting mirror as shown in the figure. S′ is a screen. The intensity at the centre of the screen is found to be I. If the mirror is removed, then the intensity at the centre of the screen would be |
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| 1277. |
What is specific heat? |
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Answer» What is specific heat? |
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| 1278. |
17. Diameter of a plano-convex lens is 6 cm andits thickness at the centre is 3 mm. The radiusof curvature for the convex surface is:A. 3 cmB. 12 cmC. 15 cmD. 5.7 cm |
| Answer» 17. Diameter of a plano-convex lens is 6 cm andits thickness at the centre is 3 mm. The radiusof curvature for the convex surface is:A. 3 cmB. 12 cmC. 15 cmD. 5.7 cm | |
| 1279. |
Note : (1) The deflecting couple on the coilof the motor is maximum when the plane ofcoil is parallel to the direction of magneticfield, while the deflecting couple is zero (orminimum) when the plane of the coil isperpendicular to the magnetic field . |
| Answer» Note : (1) The deflecting couple on the coilof the motor is maximum when the plane ofcoil is parallel to the direction of magneticfield, while the deflecting couple is zero (orminimum) when the plane of the coil isperpendicular to the magnetic field . | |
| 1280. |
122.Explain right hand rule keenly |
| Answer» 122.Explain right hand rule keenly | |
| 1281. |
23. if beam of electron is moving directly toward observer facing east ,where magnetic field act from south to north ,then electro will deflected toward a.east b.west c.upward d.downward |
| Answer» 23. if beam of electron is moving directly toward observer facing east ,where magnetic field act from south to north ,then electro will deflected toward a.east b.west c.upward d.downward | |
| 1282. |
The image of a candle flame placed at a distance 36 cm from a spherical lens is formed on a screen placed at a distance of 72 cm from the lens. Identify the type of lens and calculate its focal length. If the height of the flame is 2.5 cm, find the height of its image. |
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Answer» The image of a candle flame placed at a distance 36 cm from a spherical lens is formed on a screen placed at a distance of 72 cm from the lens. Identify the type of lens and calculate its focal length. If the height of the flame is 2.5 cm, find the height of its image. |
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| 1283. |
The floor of the swimming pool looks shallower that what it really is. What phenomenon is responsible for this observation? |
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Answer» The floor of the swimming pool looks shallower that what it really is. What phenomenon is responsible for this observation? |
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| 1284. |
{ A planet of volume }V and mass }m has gravitational }}{ acceleration }g on its surface. If it expands to }}{8 times its original volume, what will be the }} acceleration due to gravity? |
| Answer» { A planet of volume }V and mass }m has gravitational }}{ acceleration }g on its surface. If it expands to }}{8 times its original volume, what will be the }} acceleration due to gravity? | |
| 1285. |
We know that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain. |
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Answer» We know that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances? Explain. |
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| 1286. |
Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of convex mirror in this diagram. |
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Answer» Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of convex mirror in this diagram. |
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| 1287. |
Which colour indicates the hottest surface temperature of a star? |
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Answer» Which colour indicates the hottest surface temperature of a star? |
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| 1288. |
how to finsd the direction of tensio |
| Answer» how to finsd the direction of tensio | |
| 1289. |
Why don't we use a series arrangement of electrical appliances like bulb, television, fan and others in domestic circuits? |
| Answer» Why don't we use a series arrangement of electrical appliances like bulb, television, fan and others in domestic circuits? | |
| 1290. |
Question 9Name the part of the eye which gives colour to the eyes. |
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Answer» Question 9 Name the part of the eye which gives colour to the eyes. |
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| 1291. |
A compound microscope is used to enlarge an object kept at a distance of 0.03 m from it's objective which consists of several convex lenses in contact and has focal length 0.02 m. If a lens of focal length 0.1 m is removed from the objective, then to refocus the image the eye-piece of the microscope must be moved by (in cm) |
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Answer» A compound microscope is used to enlarge an object kept at a distance of 0.03 m from it's objective which consists of several convex lenses in contact and has focal length 0.02 m. If a lens of focal length 0.1 m is removed from the objective, then to refocus the image the eye-piece of the microscope must be moved by (in cm) |
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| 1292. |
if E1 and E2 are electric field at axial point and equatorial point of an electric dipole then dot product of E1 and E2 will be? |
| Answer» if E1 and E2 are electric field at axial point and equatorial point of an electric dipole then dot product of E1 and E2 will be? | |
| 1293. |
If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be |
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Answer» If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be
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| 1294. |
A body is acted upon by a force. State two conditions when the work done is zero. |
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Answer» A body is acted upon by a force. State two conditions when the work done is zero. |
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| 1295. |
How magnetic field on the axis of a loop is zero |
| Answer» How magnetic field on the axis of a loop is zero | |
| 1296. |
The coefficient of linear expansion of a solid depends on the unit of ___. |
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Answer» The coefficient of linear expansion of a solid depends on the unit of |
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| 1297. |
the angular position of a particle revolving around a circular path given by θ=t2-3t+4radian.Find the accelaration of the point at t=2sec .Given radious=1 1)2m/s2 2)\sqrt{5m/s2} 3)1m/s2 4)5m/s |
| Answer» the angular position of a particle revolving around a circular path given by θ=t2-3t+4radian.Find the accelaration of the point at t=2sec .Given radious=1 1)2m/s2 2)\sqrt{5m/s2} 3)1m/s2 4)5m/s | |
| 1298. |
A source of sonic oscillations with frequency n=1700 Hz and a receiver are located on the same normal to a wall. Both the source and the receiver are stationary, and the wall recedes from the source with velocity u=6.0 cm/s. Then the beat frequency registered by the receiver is approximately (velocity of sound is v=340 m/s) |
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Answer» A source of sonic oscillations with frequency n=1700 Hz and a receiver are located on the same normal to a wall. Both the source and the receiver are stationary, and the wall recedes from the source with velocity u=6.0 cm/s. Then the beat frequency registered by the receiver is approximately (velocity of sound is v=340 m/s) |
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| 1299. |
How two protons may attract each other |
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Answer» How two protons may attract each other |
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| 1300. |
Why pulling is easier than pushing a body |
| Answer» Why pulling is easier than pushing a body | |
