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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. |
calculate the potential at point p due to a charge of 4×10^-7 C located 9 CM away.(ii) hence obtain the work done in bringing a charge of 2×10^-9 from infinity to P does the answer depend on the path along which the charge is there brought. |
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| 2. |
The radiation present in sunlight that gives us feeling of hotness is |
| Answer» ULTRA violet light (UV)EXPLANATION:if my answer helps MARK me as BRAINLIEST | |
| 3. |
At what wavelength does a cavity radiator at 300K emit most radiation? |
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Answer» :WAVELENGTH= 0.0029/k = 9667 NM is the CORRECT ANSWER... |
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| 4. |
What are the laws of refraction |
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Answer» law is a formula used to DESCRIBE the RELATIONSHIP between the angles of incidence and refraction, when referring to LIGHT or other waves passing through a boundary between two DIFFERENT isotropic media, such as water, glass, or air.If you satisfy on my answer please mark it BRAINLIEST ✏️✏️✏️✏️ |
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| 5. |
1) the length between the centre of curvature and pole of a mirror is 10cm . what is the length between the focal point and the pole of the mirror......?????? |
| Answer» 5 cmExplanation:In a spherical mirror, DISTANCE between pole and centre of curvature is double the distance between focal point and pole (2f = R)=> f = 5 CM | |
| 6. |
Assertion: The value of 'g' decreases as the height and depth increases from the surface of the Earth. Reason: 'g' depends on the mass of the object and the earth. |
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| 7. |
5 Newton into 3 meters = ? joules |
| Answer» 15 jExplanation: | |
| 8. |
What are the laws of REFRACTION I WILL MARK AS BRAINLIEST |
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Answer» The law of reflection STATES that the incident ray, the REFLECTED ray, and the normal to the SURFACE of the mirror all lie in the same PLANE. Furthermore, the angle of reflection is equal to the angle of incidence. . Both angles are measured with respect to the normal to the mirror. |
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| 9. |
What is the exact exact meaning of vernacular |
| Answer» VERNACULAR MEANS genral or DIFFERENT | |
| 10. |
In a series L-R circuit, XL = R and power factor of the circuit is P1 When a capacitor with capacitance C such that XL = Xc is put in series, the power factor becomes P2 Find P1/P2 |
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Answer» p1÷p2=1÷√2 Explanation:in FIRST circuit only inducter and resistance is PRESENT and the this resultant of the VOLTAGE will be 45 degrees ahead of current.and in second ONE capacitor also involved and GIVEN XL=Xc them the resultant resistence/voltage in the direction of current and the angle is 0 degrees.p1 power factor is cos(45)=1÷√2p2 power factor is cos(0)=1.so p1÷p2 is 1÷√2 |
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| 11. |
Why is the use of ac voltage preferred over dc voltage? [AI2014] |
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Answer» Ac is more PREFERRED than dc because it is easy to maintain and change the voltage of ac for TRANSMISSION and distribution purpose. Plant cost of ac transmission is much LOWER COMPARED to dc transimission. When FAULT occurs it is easy to interrupt ac supply.Explanation:Hope it helps you.... |
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| 12. |
The power factor of an ac circuit is 0.5. What is the phase difference between voltage and current in this circuit? [Foreign 2015] |
| Answer» HEY above☝️ is your answer.Hope This HELPS. | |
| 13. |
Which of the following has minimum wavelength? (a) Blue light (b) γ-rays (c) infrared rays (d) microwave |
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Answer» tion:Radio waves, INFRARED rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of ELECTROMAGNETIC radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.hope this will HELP U ..❤❤ |
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| 14. |
Why do we prefer carbon brushes than copper in an ac generator? [DoE] |
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Answer» copper is good CONDUCTER of ELECTRICITY so carbon BRUSHES are USED |
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| 15. |
Does a step down transformer violate the principle of conservation of energy? |
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Answer» hjfcyixyixizyisstitstsztiztictrzsoryxudyxzkzriysi drzkssizuetoExplanation:fjfyyidoytdtdtyrgyorf. ipfyufyffi |
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| 16. |
Why does a low power factor imply large power loss in transmission for circuits used for transporting electric power? [NCERT Example] |
| Answer» TION:m kxhxxkyzksfkzbxryikyfxkgx!fhxmgfxkfzkfsksktshdytytd | |
| 17. |
Which of the following has maximum penetrating power? (a) Ultraviolet radiation (b) Microwaves (c) γ-rays (d) Radio waves |
| Answer» TION:Radio WAVES has MAXIMUM penetrating POWER .༺♥༻✧✧༺♥༻✧✧༺♥༻✧༻✧✧༺♥♥༻✧✧༺♥༻✧✧༺⋆⋆⋆⋆⋆⋆HOPE IT HELPS☆▪︎▪︎ | |
| 18. |
In a series LCR circuit, XL, Xc and R are the inductive reactance, capacitive reactance and resistance respectively at a certain frequency f If the frequency of ac is doubled, what will be the values of reactances and resistance of the circuit? [DoE] |
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Answer» In a series LCR circuit, XL, Xc and R are the INDUCTIVE reactance, CAPACITIVE reactance and resistance respectively at a certain frequency f If the frequency of AC is doubled, what will be the VALUES of REACTANCES and resistance of the circuit? [DoE] |
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| 19. |
Can we measure 110 V, 50 Hz a.c. using moving coil galvanometers? How can we measure it. |
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Answer» dtugu did ma R MARK me BRAINLIEST |
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| 20. |
The instantaneous current and voltage of an ac circuitaregivenby I = 10sin314tA and V=50sin (314 t + \frac{\pi}{2}) V. What is the power of dissipation m the circuit? |
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Answer» tion:56r5ud5dy5 MARK me BRAINLIEST |
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| 21. |
Find the total current supplied to the circuit by the battery |
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Answer» what you WANT to KNOW WRITE FULL QUESTIONEXPLANATION: |
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| 22. |
Hi, I am new and I need your urgent help. I must return for this afternoon. 1° Determine the value of the weight on Jupiter of an object whose mass is m = 1200 g. 2) Determine the mass of an object whose weight on Jupiter is P = 15 N. 3) Recall what is the relationship between the weight P and the mass m of an object? Deduce the value of the intensity of gravity on Jupiter. (1 pt) 4) Calculate what is the weight on Jupiter of an object whose mass is 4 kg. 5) What is the value of the intensity of gravity on Earth? Is the intensity of gravity the strongest on Earth or on Jupiter? And how many times? (2 pts) |
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Answer» The formula is: weight/mass = gravitational field strength. On EARTH the gravitational field strength is 10 N/kg. Other planets have different gravitational field strengths. The Moon has a gravitational field strength of 1.6 N/kg.Explanation:There is no magic size or mass required for an object in order to have a 'satellite'. An 'orbit' occurs when the gravitational pull from a nearby object exactly matches the FORWARD MOTION or momentum of the ORBITING body. All objects (with mass) have gravity, however SMALL they are. |
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| 23. |
Can you answer this one please . |
| Answer» SORRY DEAR I have no IDEA for this QUESTION sorry PLEASE | |
| 24. |
What is the principal of electric motor? answer it without spam. ...... |
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Answer» tric motor utilises the magnetic effect of current. It works on the PRINCIPLE that when a rectangular coil is PLACED in a magnetic field and current is passed through it, a force ACTS on the coil which ROTATES it continuously.If you satisfy on my answer please MARK it BRAINLIEST ✏️✏️✏️✏️✏️✏️✏️ |
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| 25. |
Draw a ray diagram when light passes through a parallel glass slab I WILL MARK AS BRAILIEST |
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Answer» It is too much HARD I THINK you have to make diagram by itself you can TAKE HELP of your elder brother or SISTER. |
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| 26. |
7. Give the qualitative interpretation of theband structure of electronic energy levels ina semiconductor. |
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Answer» tion:In INSULATORS the electrons in the valence BAND are separated by a large GAP from ... band theory is the Fermi level, the top of the AVAILABLE ELECTRON energy levels at low temperatures. |
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| 27. |
कस्तु का पूची की सतह पर भार 144 N है। जब इसे 1 = 3R ऊँचाई तक लाया जाता है, जहाँ पृथ्वी की त्रिज्या है, इसका भार हो सकता है() 48N(2) 36N16N(4) 9N |
| Answer» HI hdgeufduddjstyarufsudeyshxhcsgxayc | |
| 29. |
A column of liquid 30cm high supportsba 60 cm water what is the relative density |
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Answer» रृरुईर्गजफूExplanation:fuduefytdgjkgvjfideryyufckj |
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| 31. |
A particle of mass is 15kgmoving with 5m/salong a straight line and a force of 30 is acting on it opposite to the direction of its velocity. What is the work done in joules by the force during the third second of motion of the particle? |
| Answer» LASS QUESTION is this....... | |
| 32. |
When an alternating current is passed through a moving coil galvanometer, it shows no deflection. Why? |
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Answer» tion:current flowing through the galvanometre coil produces the torque & moves the pointer. Direction of torque depends on the direction of current. Every half phase of alternating current produce movement in opposite direction which gets on averaged zero. hoped so it HELPS.... rate my ANS...by GIVING THNKS or by marking as brainellist... |
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| 33. |
The peak value of emf in ac is E0. Write its (i) rms, and (ii) average value over a complete cycle. [Foreign 2011] |
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Answer» The PEAK value of e.m.f. in a.c. is E0. WRITE its (i) rms (ii) average value over a COMPLETE cycle. - 5355061. |
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| 34. |
A particle of mass 15 kg is moving with 5m/s inverse along a straight line and a force of 30 n is acting opposite to the direction of its velocity |
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Answer» it's VELOCITY is=45m/ s |
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| 35. |
Is there are any device by which direct current can be controlled without any loss of energy? |
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Answer» ─╔═╗──────────║╔╗║╔═╦╗║═╣╔╦╦╗╔═╗╔╦╗║╠╣║║║║║╠═║║║║║║╩╣║╔╝╚╝╚╝╚╩═╝╚═╝╚══╝╚═╝╚╝──────────────────────Yes there are MANY device by which direct CURRENT can be CONTROLLED without any loss of energy. I HOPE it helps you... ♥♥♥Please mark as brainliest ANSWER ✔✔✔τнänκ чöü♥ |
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| 36. |
At an airport, a person is made to walk through the doorway of a metal detector, for security reasons. Is she/he is carrying anything made of metal, the metal detector emits a sound. On what principle does this detector work? [NCERT Exempler] |
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Answer» If she,,he is carrying anything MADE of metal, the metal detector EMITS a SOUND. On what PRINCIPLE does this ... |
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| 37. |
Which of the following curves may represent the reactance of a series LC combination? [DoE] |
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Answer» Reactance of capacitor, X C = jωC1 = ωC−j Reactance of inductor, X L =ωLSince in SERIES combination, net reactance=X C +X L =j(ωL− ωC1 )So reactance magnitude tends to infinity as FREQUENCY tends to 0 as WELL as infinity |
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| 38. |
The current flowing through a pure inductor of inductance 4mH is i= 12 cos 300 t ampere. What is (i) rms, and (ii) average value of the current for a complete cycle? [Foreign 2011] |
| Answer» SORRY I don't KNOW what is ITI am very sorry | |
| 39. |
A 110 V dc heater is used on an ac source, such that the heat produced is the same. What would be the value of the alternating voltage? |
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Answer» tion:110 volt dc heater is USED on an AC SOURCE such that the heat produced is same as it produce when connected to 100 volt dc in same time INTERVALS is 220 volts If it is wrong please forgive me if it is correct please please please mark brainliest answer please and click thanks BUTTON please |
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| 40. |
A bulb and a capacitor are connected in series to an ac source of variable frequency. How will the brightness of the bulb change on increasing the frequency of the ac source? |
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Answer» The brightness will INCREASE with the increase in frequency. Bulb and capacitor are CONNECTED in series with variable frequency ac SOURCE. So, the total IMPEDANCE of the circuit will depend upon the frequency and as the frequency will increase the impedance will decrease and vice-versa. |
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| 41. |
A capacitor blocks dc and allows ac. Why? |
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Answer» If a constant VOLTAGE (DC) is APPLIED ACROSS a capacitor that is not charged, it charges up to some value decided by the voltage and the capacitance (Q=CV). ... That's why capacitors are said to block DC. If the voltage is always changing over time (AC) the capacitor ATTEMPTS to keep it constant. |
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| 42. |
Can a capacitor of suitable capacitance replace a inductor coil in an AC circuit? |
| Answer» TION:dfhjgcuy MARK me BRAINLIEST | |
| 43. |
In a series LCR circuit, the voltages across an inductor, a capacitor and a resistor are 30 V, 30V and 60V respectively. What is the phase difference between the applied voltage and the current in the circuit? |
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Answer» For All, Hatred For None.2.Aspire to inspire before we expire.3.Everything you can IMAGINE is real.4.Whatever you do, do it well.5.Die with memories, not DREAMS. 6.Never regret ANYTHING that MADE you smile. 7.Every moment is a fresh beginning.8.Change the WORLD by being yourself. |
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| 44. |
Calculate the rms value of the alternating current shown in the figure. [HOTS] |
| Answer» MARK me brainliestExplanation:cuyduy | |
| 45. |
Given circuit calculate the potential difference between the points a and b |
| Answer» V=irhere v is VOLTAGE R is RESISTANCE i is CURRENT | |
| 46. |
संलग्न चित्र में समतुल्य प्रतिरोध होगा- plz solve fast |
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Answer» Explanation:HERE IN THE LAST SECTION 3,3A D 4 OHM ARE IN SERIES.R NET 1 = 3+3+4 = 10 OHMS..................(1)THIS R NET 1 IS IN PARALLEL WITH 10 OHMR NET 2 = 10*10/10+10 [ PARALLEL = R1R2/(R1+R2) = 5 OHMS..............(2)THIS 5 OHM IS IN SERIES WITH 2 AND 3 OHMSTHEREFORE RNET = 5+2+3 = 10 OHMS.HOPE THIS HELPS. |
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| 47. |
Ɦɛʏǟ ʍǟȶɛֆ♡♡ᴡʜᴏ ᴅɪꜱᴄᴏᴠᴇʀᴇᴅ ᴇʟᴇᴄᴛʀᴏɴꜱ ᴀɴᴅ ᴡʜᴇɴ ..... |
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Answer» homson discovered electron in 1897 when he was STUDYING about cathode rays .Electrons are sub - atomic NEGATIVELY charged PARTICLES that orbits the NUCLEUS on an atom .Electrons are represented as Hope it's helpful ..... ❤ |
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| 48. |
What do you mean by refraction of light |
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Answer» The ratio of the velocity of light in a VACUUM to its velocity in a specified medium.This is called REFRACTION of light. PLZ FOLLOW ME AND MARK THE ANSWER BRAINLIST ANSWER |
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| 49. |
A satellite orbits earth in a circle of radius 8000 . At that distance from earth g = 6.2 m/s 2 .The velocity of the satellite is |
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| 50. |
Find electric field at point P |
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Answer» There is not NECESSARILY any CHARGE at point P. An ELECTRIC field E atpoint P (or any otherpoint) means that _if_ a "test charge" q is brought to that point, that "test charge" q will FIND a force F that is given by F = E q. Remember, tho', this is true only as a vector equation! |
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