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.
| 2851. |
substances that have low density are heavier and substances that are high density are lighter true or false |
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| 2852. |
two charges +3q and -3q are placed at some separation is F newton? What will be force between two protons at same separation? |
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Answer» don't KNOW this answer is |
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| 2853. |
3. Fill in the blanks with suitable linking verbs :1. Akbara great king.2. Hea teacher.3. Theyrich.4. Rosessweet.5. The earthround. |
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Answer» Answer: 1.Akbar was a great king. 2. he is a teacher. 3. they are rich. 4. roses are sweet. 5. the EARTH moves around the sun plz FOLLOW me and MAKE me BRAINLIEST |
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| 2854. |
(v)यदि 2uF के तीन संधारित्र आपस में समांतर क्रम में जोड़े गये हैं तो परिणामी धारिता होगी(अ) 34(ब) Tur(स)6uF(द)है। |
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Answer» Answer: 6υF Explanation: as PER SERIES COMBINATION of CAPACITOR C.=C1+C2+C3 =2+2+2 =6UF |
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| 2855. |
determine the resistance of a copper wire having a length of 1 km and diameter 0.5 mm Plz answer this... |
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Answer» R = 85 Given: Length = L= 1km= 1000m Diameter = D= 0.5mm = 5 × 10^-4 m Radius = R = 2.5 × 10^-4 m Area = A = 22/7 × (2.5 × 10^-4)² Formula: R = (resistivity × length)/Area of cross sectionR = (1.72 × 10^-8 × 1000)/ 22/7 × 6.25 × 10^-8 R = (1.72 × 7000/22 × 6.25) ohm R = 85 ohm hope HELPFUL ❤ |
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| 2856. |
2 resistor are connected in series given as equivalent resistance of 10 ohms when connected in parallel gives 2.4 ohms then the individual resistance are_________ |
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Answer» Answer:The individual resistance are 6 ohms and 4 ohms. Explanation: Given that, two resistors are connected in series gives an equivalent resistance of 10Ω. When connected in parallel, gives 2.4Ω. We NEED to find the individual resistance. Equivalent resistance in series combination is : R=R1+R2 10=R1+R2--------------(1) Equivalent resistance when connected in parallel is : 1/R=1/R1+1/R2 2.4=1/R1+1/R2-------------(2) On SOLVING (1) and (2) we GET : R1=6 ΩR2= 4 ΩSo, the individual resistance are 6 ohms and 4 ohms. Hence, this is the required solution. Hope helpful ❤ |
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| 2857. |
Which force when u apply ur muscles to do work |
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Answer» hmmmm SORRY I can't UNDERSTAND this QUESTION |
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| 2858. |
2 Howdoyou get the displacement of aparticle in time interval t1 to t2 fromits velocity -time graph ? |
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| 2859. |
A ti can sinks when it is heated with a lid closed and then poured cold water in it why |
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Answer» When the tin is heated, the air within and water molecules expand. As the volume expands, so does the tin container up to a limit. It is possible that a small amount of air and water vapours ESCAPE if the tin is not 100% airtight. ... Therefore, the thin tin container collapses till pressure within and WITHOUT balance. Explanation: hope it's answer that you WANT |
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| 2860. |
A projectile is fired in such a way that the horizontal range is three times the maximum height.Angle of projection is |
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Answer» Answer: R=3H R=4H cot(theta) so now, 3H = 4H cot(theta) cot(theta) = 3/4 tan(theta)= 4/3 = perpendicular /base So, ANGLE of PROJECTION is 53 DEGREE. |
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| 2861. |
What is the value of universal constant in si system ? and write its unit |
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Answer» Answer: approximately 6.674× The measured value of the constant is known with some certainty to four SIGNIFICANT digits. In SI units its value is approximately 6.674×10−11 m3⋅kg−1⋅s−2. Explanation: |
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| 2862. |
Answer in details: Give reasons for the working of a rocket depend on third law of motion |
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Answer» Explanation: NEWTON's Third Law states that "EVERY action has an EQUAL and opposite reaction". In a rocket, burning fuel creates a push on the FRONT of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards. The Brainliest Answer! |
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| 2863. |
Relation between focal length F and radius of curvature R of a spherical mirror is |
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Answer» Answer: The relationship between the FOCAL length F and RADIUS of curvature R is r = 2fExplanation: hope it will help you.... |
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| 2864. |
Which surface has more friction-rough or smooth?why? |
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Answer» Answer: FRICTION is ALWAYS more on a rough surface compared to a smooth surface. This is because rough surface OFFERS more resistance to the movement of an object over it compared to a smooth surface. Explanation: hope it will help you please FOLLOW me |
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| 2865. |
Write different formulas to find electrical energy |
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Answer» Electrical energy is the product of power MULTIPLIED by the length of time it was consumed. So if we KNOW how much power, in Watts is being consumed and the time, in seconds for which it is used, we can FIND the total energy used in watt-seconds. In other words, Energy = power x time and Power = voltage x current. To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω) To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω) To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps) To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps) Also: [ P = V2 ÷ R ] P (watts) = V2 (volts) ÷ R (Ω) Also: [ P = I2 x R ] P (watts) = I2 (amps) x R (Ω) hope it will be HELPFUL for you! please mark my answer as brainliest and follow me for your doubt clearing. |
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| 2866. |
Write theorem of parallel axis of moment of interia and prove it. |
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Answer» The theorem of parallel AXIS states that the moment of inertia of a body about an axis parallel to an axis passing through the CENTRE of mass is equal to the sum of the moment of inertia of body about an axis passing through centre of mass and product of mass and square of the distance between the TWO AXES. |
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| 2867. |
What is thermal expansion........ |
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Answer» Answer: Thermal expansion is the tendency of matter to change its shape, AREA, and volume in RESPONSE to a change in temperature. Temperature is a MONOTONIC function of the average molecular KINETIC energy of a substance. When a substance is heated, the kinetic energy of its molecules INCREASES. |
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| 2868. |
What is the ratio of object distance to the image distance in case of a concave mirror when it is magnification is 0.5. |
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Answer» SOLUTION : As m=h2h1=-vu=0.5=12∴uv=2 , IGNORING NEGATIVE SIGN. |
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| 2870. |
Calculate the percentage efficiency of packing in case of face centred cubic crystal |
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| 2871. |
Kindly solve this asap |
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Answer» heyy hlww The ans is above. hope it helps U!! MARK me as BRAINLIEST. |
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| 2872. |
Yes good answer.which force u require rest on earth |
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Answer» GRAVITATIONAL force Explanation: MARK me as BRAINLIEST |
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| 2873. |
What is velocity?define velocity |
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| 2874. |
The followingFind theequivalent resistance ofcombinations - |
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Answer» one of the FOLLOWING is rational number has terminating decimal representation a part 221 divide 32 into to raise to POWER to be 74153 73421a part 221 |
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| 2875. |
TheWaveExpressoflengthsLight (58934) inyellowteamsofnm. |
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| 2876. |
The direction of magnetic field in case of a straight current carring conductor can be found by right hand thumb rule wherr thumb respresnt the direction of magnetic feildtrue or false |
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Answer» FALSE Explanation: IT SHOWS THE DIRECTION OF FORCE APPLIED ACC TO MAXWELL S RIGHT HAND RULE |
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| 2877. |
What is force................. |
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Answer» Every PUSH and pull on an object is KNOWN as force. Its MATHEMATICAL expression is- F = m × a Hope it helps please mark me as the brainliest |
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| 2878. |
What exactly electric potential is ? |
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Answer» Answer: Electric potential, the amount of WORK NEEDED to MOVE a unit CHARGE from a reference POINT to a specific point against an electric field. EXTRA KNOWLEDGE: Typically, the reference point is Earth, although any point beyond the influence of the electric field charge can be used. |
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| 2879. |
Define average velocity |
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Answer» Answer: The average VELOCITY of an object is its total displacement divided by the total time taken. In other WORDS, it is the rate at which an object changes its position from one place to another. Average velocity is a VECTOR QUANTITY. The SI unit is meters PER second. Explanation: hope this helps please follow |
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| 2880. |
In an n-p-n transistor, the collector current is 10 mA, If 80% of the electrons emitted reached to the collector, the base current (in mA)isO2.51.5O1o 2 |
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Answer» (A) 8X + 5) (2x + 3) is your responsibility is to INFORM me about it and please LET me in |
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| 2881. |
|vec A|=5 |bar(B)|=4& angle between bar(A)&bar(B) is 60^(0) then |bar(A)-bar(B)| will be 8. (B) 4 (A) 5 (D) none of these. |
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Answer» (D) NONE of these |⃗A - ⃗B| = √21 Explanation: Given |⃗A| = 5 |⃗B| = 4, θ = 60º Calculation. We know that for any vector ⃗X, ⃗X. ⃗X = |⃗X||⃗X|cos(0) = |⃗X|² Applying this with ⃗A - ⃗B we GET |⃗A - ⃗B|² = (⃗A - ⃗B).(⃗A - ⃗B) = ⃗A.⃗A - ⃗A.⃗B - ⃗B.⃗A + ⃗B.⃗B = |⃗A|² - 2|⃗A||⃗B|cos(θ) + |⃗B|² = 5² - 2*5*4*cos(60º) + 4² = 25 - 2*5*4*(1/2) +16 = 25 + 16 - 20 = 21 or |⃗A - ⃗B| = √21
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| 2882. |
the magnitude of inclued E.M.F produce depends to the rate of change of magnatice fluse through the coil true or false |
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Answer» Hey there the answer is TRUE Explanation: Yes, the MAGNITUDE of induced E.M.F produce depends to the RATE of change of magnetic flux through the COIL . Hope it Helps You.... Please mark BRAINLIEST
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| 2883. |
Please help me out.... with this question.... Please answer me fast Who will answer me first and correct I will make them brainlist Please be fast.....I want this full page answer |
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Answer» Answer: 1. capacity 2.mass per UNIT volume 3.oscillatory motion 4.temperature 5.nuclear ENERGY plz mark me as brainlist |
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| 2884. |
Write Ampere's Circuital Law. Write its expression also. On the basis of this lawfind the expression for magnetic field inside a current carraying coil. |
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Answer» Answer: Ampere's CIRCUITAL Law states the relationship between the current and the magnetic field created by it. This law states that the integral of magnetic field density (B) along an imaginary closed path is equal to the product of current enclosed by the path and permeability of the medium. Ampere's circuital law states that LINE integral of magnetic field forming a closed loop around the current(i) carrying wire, in the plane normal to the current, is equal to the μo times the NET current PASSING through the close loop. Explanation: The magnetic field strength at the center of a circular loop is given by B=μ0I2R(at center of loop), where R is the radius of the loop. RHR-2 gives the direction of the field about the loop. |
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| 2885. |
How many fundamental quantities and which? |
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Answer» Answer: In PHYSICS, there are seven fundamental physical QUANTITIES (which are measured in base units, or fundamental physical units): length, MASS, time, electric CURRENT, temperature, amount of a substance, and luminous intensity. |
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| 2886. |
The capacity of a parallel plate capacitor is c.If we double it's area and distance between the plates the what will be the capacity?? |
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Answer» ACCORDING to my EXPLANATION this answer is same. explanation is here. |
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| 2887. |
Ram goes shopping for a study table for his room. He likes a table that has a volume of60 cubic feet. The amount of space available in his room is 6 feet long 5 feet wide and5 feet high wil he be able to accommodate the new study table in his room? Justify youranswerKTT |
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Answer» Explanation: Given Ram goes SHOPPING for a study table for his room. He likes a table that has a volume of 60 cubic feet. The amount of SPACE available in his room is 6 feet long 5 feet wide and 5 feet high will he be able to accommodate the new study table in his room? JUSTIFY your answer.
Reference link will be |
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| 2888. |
Please seriously answer it |
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Answer» Explanation: |
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| 2889. |
Calculate the coulomb's force between two alpha particles separated by a distance of 3.2 ×10 -15 m |
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Answer» Answer ➡️✨see this PIC ........✨ ¯\_(ツ)_/¯ |
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| 2890. |
In a hydroelectric power plant, water is available at the rate of 1.864 m3/sec with an available head of 250 m. The turbines run at a speed of 250 rpm with 70% efficiency. Considering the plant load factor of 0.5, determineAvailable powerType of turbine to be selected & the total number of turbines required |
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Answer» APPARENTLY the only thing is that it was a NEW song fffeyey you doing recently I was just wondering I want to be in the FUTURE |
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| 2891. |
Area, work,power,volume are which physical quantities |
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Answer» area= l² work=f.d=ML²T-².,Joules volume = l³ |
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| 2892. |
QI Prove that vectore à and B are parallel ro each other À = 4i+ 3j +k , B = 12 i+ 9j + 3K |
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Answer» Explanation: 1. first method :-A=4i +3j+k B = 12i+9j+3k = 3(4i+3j+k) =3A since B is equal to scalar mutiple of A. hence A and B are parallel 2. second method:-finding angle using formulacos x = A.B ।A। ।B। hence cosx= (4i+3j+k).(12i+9j+3k) (26)½(234)1/2 cosx = 48+27+3 (6084)½ cosx = 78 78 cosx=1 => x=0 Angle between two vectors is zero therefore,A and B vectors are parallel
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| 2893. |
1. What will be the pH of the following salt solution. (a) salt made from strong acid and strong base (b) salt made from strong acid and weak base. |
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Answer» Explanation: The SALT made from strong acid and strong base will be NEUTRAL salt whose pH is always 7.The salt made from strong acid and weak base is always an ACIDIC salt whose pH is LESS than 7. |
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| 2894. |
Area, volume,work,power are...... .. physical quantities |
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Answer» Answer: |
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| 2895. |
1) Explain the following (a) a farmer treats the soil of his fields with quicklime lime. (b) Antacids are given to people suffering from stomach pain or acidity |
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Answer» Heye your answer ⏬ ___________________________ ★ A farmer would treat the soil of his farm with quicklime or slaked lime only if the soil is acidic in nature. This is because acidic soil is not SUITABLE for farming. ... They make the soil neutral or basic by treating it with quicklime or slaked lime. ★ When excessive amounts of acids are produced in the stomach the natural MUCOUS barrier that protects the LINING of the stomach can damage the esophagus in PEOPLE with acid reflux. Antacids contain alkaline ions that chemically neutralize stomach gastric acid, reducing damage and RELIEVING pain. __________________________ |
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| 2896. |
ANSWER THE FOLLOWING QUESTIONS: |
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Answer» which QUESTIONS are you asking Explanation: SORRY I don't UNDERSTAND your answer |
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| 2897. |
1) Write the balanced chemical equations for the following word equations. (a) Carbon dioxide in excess is passed into white precipitate of calcium carbonate in water. (b) A mixture of carbon dioxide and Ammonia is passed into brine solution (c) Chlorine gas is passed into dry slaked lime. |
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Answer» Answer: |
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| 2898. |
Answer with equation please.... |
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Answer» Therefore the screen is 60 CM from the mirror. But from object it is 60-20 cm= 40 cm AWAY. Hope this answer helps |
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| 2899. |
The magnifude of induced E.M.F producedepends of the rate of change ofmagnetic fluse through the coil.True orFalse |
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Answer» Answer: Explanation: YES, the magnitude of INDUCED E.M.F produce depends to the rate of change of MAGNETIC FLUX through the coil . where, theta is angle between magnetic field B and area A. |
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| 2900. |
Physics class 9 please help me |
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Answer» (a)is the answer |
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