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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.
| 2901. |
1) Give reasons for the following (a) HCl and HNO3 show acidic characters in aqueous solution while glucose and alcohol solution do not show acidic character even though they contain hydrogen. (b) Dry HCl does not change the color of dry litmus paper. |
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Answer» BHAI, ye chemistry hai, physics nahi but, ye lo apka answer a) Glucose and alcohols have +I group which reduces the polarity of the -OH BOND PRESENT, hence reducing the acidity b) This is because dry HCl gas does not contain H+ ions. It is only in the aqueous solution that an acid dissociates to give ions. Since in this case, neither HCl is in the aqueous FORM nor the litmus paper is wet. please mark me brainliest |
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| 2902. |
Volume of irregular objects measured with |
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Answer» Answer: The MASS you can measure on a balance or a scale, and the volume is the amount of space the object OCCUPIES. You can find the volume of an irregular object by immersing it in water in a beaker or other CONTAINER with volume markings, and by SEEING how much the LEVEL goes up. |
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| 2903. |
5) Grater the power of anof an appliancehigher is the current flowing through it true or false ... |
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| 2904. |
Of what materail wires of standard resistance made and why |
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Answer» Answer: NichromeExplanation: Nichrome is a non-magnetic alloy that is commonly made up of 80%. nickel and 20% chromium. It has very low resistivity and a very high BOILING point which makes nichrome a very good conductor of electricity and material for MAKING wires and standard RESISTANCE COIL. |
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| 2906. |
15) Grater the power ofan appliancehigher is the current flowing through it(true or false) |
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Answer» Answer:true Explanation:The higher the voltage, the lower the current. The lower the current, the lower the resistance losses in the CONDUCTORS. ... The lower current that accompanies high voltage transmission REDUCES resistance in the conductors as electricity flows along the CABLES.
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| 2907. |
A gun of mass 5 kg fire a bullet of mass 10 gram of speed 300 m per secs with a velocity of 160 meter per secs. find the velocity of gun |
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Answer»
A machine gun fires bullets of 50 gm at the speed of 1000 m/sec. If an average force of 200 N is exerted on the gun, the MAXIMUM NUMBER of bullets fired per minutes is: ans :- Mass of bullet m=0.05 Kg v=1000m/s F=200N Force on the man is equal to the CHANGE in momentum of the bullets coming out of the gun F= t mvn
200= 1 0.5×1000×n
n=4persecond n=240perminute I THINK this to solve that problem |
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| 2908. |
How many 176 ohm resistors in parallel are required to carry 5A current on a 220V line |
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Answer» R = v/a R = 220/5 = 44 ohm let NUMBER of RESISTANCES be n so in parallel n/176 = 1/44 n =4 |
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| 2909. |
14) When the current changes the directionso time in one sec then the frequencyis 50 hz true or false |
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Answer» Answer:
Explanation: ✌️please mark as brainliest answer✌️ |
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| 2910. |
प्रकाश की किरणें कांच किस लेवल पर अब अतीत होने पर बर्तन का पश्चात सात रंगों में विभक्त नहीं होता |
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| 2911. |
ABC Meaning in college life.. A-- B---- Ch--_ A-s B-o-s Ch-o-- Answer fast.. |
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Answer» t8pr9e9fpt70tid95ofkxudot9x6kg0hogkxkr9rpulhof0dlr0to6sksi6irl9rp9t0t9fo9fofiuikkiii |
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| 2912. |
2.is the state of matterwhich has a definite mass volumeand shape.3.is the temperature atwhich temperature at which solidchanges into liquid state. |
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Answer» 1) SOLID 2)32° FAHRENHEIT, or 0° CELSIUS.... |
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| 2913. |
Give reason , usually a fielder in a cricket match , moves his hands in the direction of motion of cricket ball , after taking the catch |
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Answer» Answer: |
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| 2914. |
ㅂ13) The direction of induced current canbe found by fleming's left Handruletrue or false |
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| 2915. |
please give correct answer tf you know. otherwise wrong answer or suggestions like mark me something like that will be reported |
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Answer» THEREFORE,the REQUIRED ANSWER is (d)4/3ML^2 Hope it will HELP you |
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| 2916. |
1g of ice at 0°c is mixed with 19g of steam at 100°c find final composition |
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Answer» Explanation: |
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| 2917. |
SUppose that two objectsattract each other with agravitational force of 16 units.If the distance between thetwo objects is reduced in halfthen what is the new force,of attraction between thetwo objects? |
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Answer» Explanation: 8 UNITS is your answer |
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| 2918. |
12) In 15 Awiring the copper wire usedis thicker as compared to 5A wiring,(true or false) fast tell me answer |
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Answer» tuofuodd6fjflhlflgkclcpdofo |
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| 2919. |
A circular disc rolls down an inclined plane.The ratio of the total kinetic energy to the rotational kinetic energy is |
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Answer» fohckhcohcohcohchcphcoh pjvpjv |
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| 2920. |
Give reason , it is dangerous to get down from the moving bus even if the bus is moving slow |
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Answer» if we MOVE suddenly if BUS driver drives fast we will FALL down and RISK our lives Explanation: |
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| 2921. |
5. Find the angles between the following pairs ofvectors :(1) A =î+ſ+k and B = -2 -2 -2 h.(ii) À=-2î + 21 -ħ and B = 3 + 6ſ +2k(iii) A = 2î - 4ſ +6k and B = 3 î + ſ + 2 k. |
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Answer» Explanation: Parallel vector to first line is i ^ + j ^ +2 ^
Parallel vector to second line is ( 3 −1) i ^ −( 3 +1) j ^ +4 k ^
Let the angle between two lines be θ. Then ( i ^ + j ^ +2 k ^ ).(( 3 −1) i ^ −( 3 +1) j ^ +4 k ^ )=∣ i ^ + j ^ +2 k ^ ∣∣( 3 −1) i ^ −( 3 +1) j ^ +4 k ^ ∣cosθ →(6)=( 6 )(2 6 )cosθ →cosθ= 12 6
So, θ=cos −1 ( 2 1 )=60 o |
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| 2922. |
Plz help to know its urgent |
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Answer» Answer: 1hr 2min Explanation: |
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| 2923. |
We beat a blanket with a stick to remove dust particles |
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Answer» When we beat a blanket with a STICK to remove dust PARTICLES, the dust particles come out. This all happens due to inertia of rest. The dust particles are at rest with the blanket. As we hit the blanket the blanket gets into MOTION i.e., CHANGES its state to motion from rest but the dust particles TRY to resist this motion by inertia of rest. Thus they come out. Mark me brainliest and follow me |
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| 2924. |
A bullet of mass 10 g is fired from a gun with a velocity of 150 m/s. Calculate the change in momentum. |
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Answer» Answer: I can't UNDERSTAND that what you are telling Explanation: |
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| 2925. |
Please help me. Answer the question. |
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Answer» Answer: |
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| 2926. |
For determination of g using simple pendulum, measurement of l and t are required. Error in the measurement of which of these will have larger effects on the value of g thus obtained and why? What is done to to maximize the error? |
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Answer» please increase the point then I will give you the answer... |
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| 2927. |
ܧܝܩܬܠܩPhysical Change drawbacks |
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Answer» |
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| 2928. |
The equivalent resistance between the point A and B is |
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Answer» Explanation: the EQUIVALENT resistance between the POINT A and B IYOU doing recently I have any QUESTIONS |
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| 2929. |
train A B and C starts from station all trains moves with same speed for a certain time after sometime train C slows down and finally stops train A continues to move with the same speed however train B continuous to move with an increase speed create a single graph which represents the motion of a train se train B and train C? |
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Answer» Type your QUESTION... 11th Physics Motion in a Straight Line Speed and Velocity A train starts from rest an... PHYSICS A train starts from rest and moves with a constant acceleration for the first 1km. For the next 3 km, it has a constant velocity and for LAST 2 km, it moves with constant retardation to come to rest after a total time of motion of 10 min. Find the maximum velocity and the three time intervals in the three types of motion. December 26, 2019 avatar Aayush Vishwavani Share Save ANSWER Suppose the velocity of the train increases from 0 to V in time t 1
, then moves with constant speed v upto time t 2
and finally its velocity decreases from v to 0 between time interval t 2
and t. For motion between t=0 and t=t 1
let acceleration be alpha. Then, α= (t 1
−0) (v−0)
= t 1
v
⇒t 1
=vα Similarly, For retardation β β= (t−t 2
) (v−0)
= (t−t 2
) v
⇒t−t 2
= β v
⇒t 1
+t−t 2
= β v
+ α v
⇒t 2
−t 1
=t−v( α 1
+ β 1
) Now, for total displacement S=1+3+2=6km, and total time taken t=10min= 6 1
h We have. S= 2 v.t 1
+v(t 2
−t 1
)+v 2 (t−t 2
)
S= 2α v 2
+v[t−v[ α 1
+ β 1
]]+ 2β v 2
v S
=v[v[ α 1
+ β 1
]2+t−v( α 1
+ β 1
)] t= v s
+ 2 v( α 1
+ β 1
)
Explanation: please mark as brainlist answer and follow me |
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| 2930. |
8.A body of more 1 kg is suspended by two strings oflengths 3 m and 4 m from two nails which are on awall at a horizontal separation of 5m. find thetensions in the longer and shorter strings. Take-g= 10 ms(a) 6N, 6N(b) 6N, SN(c) 6N, 4N(d) 8N, 8N |
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Answer» d is your answer Explanation: |
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| 2931. |
When the number of magnetic field linesthrough a closed loop changes, an indused current in the coil ( true or false ) |
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| 2932. |
A force F= (3x'yi +x'j)N is acting on a particle. Find workdone by the force during displacementof the particle from (m. Im) to 2m. -Im) (in ) |
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| 2933. |
A uniform electric field E exist between two charged plate. What would be the work done in moving a charge 'q' along closed path ABCDA? |
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Answer» Explanation: UNIFORM electric FIELD E exist between two charged plate. What would be the work done in a uclosed PATH ABCDA |
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| 2934. |
What ismeasurementwhat is the unit of measurement? |
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Answer» Explanation: A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same KIND of quantity. Any other quantity of that kind can be EXPRESSED as a MULTIPLE of the unit of measurement. For example, a LENGTH is a PHYSICAL quantity |
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| 2935. |
Calculate the number of molecules present in 170 g of NH3 |
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| 2936. |
Use the above information to prove that gauge invariance will lead to the continuity equation for electric charge i.e conservation of electric charge.Please reply fast. Thanks. |
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| 2938. |
If A = (12+ - 0.1)cm and B = (8.5+ - 0.5)cm find i) A+B ii) A-B |
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Answer» A= 11.9 B=8 A+B = 19.9 A-B =3.9 |
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| 2939. |
The sides of the triangle are ( 10+ - 0.2)cm and (52+ - 0.1)cm. Calculate the perimeter with error limits. |
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Answer» l = (10.5 ±0.2) CM, b = (5.2 ±01) cm Perimeter of a RECTANGLE, p = 2 (l + b) = 2 (10.5 + 5.2) = 31.4 cm ∆p = ±2(∆l + ∆b) = ± 2 (0.2 + 01) = ±0.6 Perimeter of a rectangle = (31.4 ± 06) cm |
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| 2940. |
(ii) सरल आवर्तगति कर रहे किसी कण की माध्य स्थिति पर त्वरण का मान होता है-(अ) शून्य(ब) अनन्त(स) एक(द) न्यूनतम। |
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Answer» Answer: the acceleration of a PARTICLE in s.h.m at MID POINT is zero |
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| 2941. |
What is the unit of ß ? |
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Answer» Answer: In non-thermal units, it can also be measured in byte per joule, or more conveniently, gigabyte per nanojoule; 1 K−1 is equivalent to about 13,062 gigabytes per nanojoule; at room temperature: T = 300K, β ≈ 44 GB/nJ ≈ 39 eV−1 ≈ 2.4×1020 J−1.Explanation: MARK as brainliest DEAR |
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| 2942. |
Determine acceleration for the masses relative to lift and tension in the string if the whole sysytem is moving with a vertically upward with uniform acceleration a not |
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Answer» Hlo mate here is UR ans.... SolutionPls refer to the ATTACHMENT above... ❤️❤️Hope this HELPS u dear❤️❤️✌️Pls Mark as brainliest✌️Don't FORGET to follow me :) |
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| 2943. |
Find angle between the vector A=2i-6j+3k and B=3i-2j+2k |
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Answer» FIND ANGLE between the VECTOR A=2i-6j+3k and B=3i-2j+2k - 19933402. |
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| 2944. |
In the figure is shown the position of a particle moving on the x-axis as a function of time. Then how many times the body stopped between t = 2s to t = 4s |
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Answer» gcrcahdhg266364747374743+4+_6 Explanation: hrharygsgsyr&(&++'777 |
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| 2945. |
A skydiver was released (with zero initial velocity) from a helicopter at a certain distance from the surface of the ground. Unfortunately, her parachute did not open and she hit the ground with the velocity of 180 km/h. Acceleration during her journey was approximately 10 m/s2. Then the time taken by her to reach the surface of the Earth is |
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Answer»
v=u+at change km/hr into m/sec 180km/hr= 50m/sec 50=0+10×t 50=10t t=50÷10=5sec thank you Mark it as the BRAINIEST. |
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| 2946. |
5. Identify from the following reactionsreduction.a. Fe +S → FeSb. 2Ag,0 - 4 Ag +0,1c. 2Mg +0, ► 2Mgod. NiO + H,-Ni+H2OBalance the following equation stepwisa. HS,O (1) + H,O(1) H.SO |
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Answer» a) Fe+S-FeS Here 'Fe' is oxidised from 0 to +2, while 'S' is reduced from 0 to -2. b) 2Ag,0-4Ag+0,1 'Ag' is reduced from +1 to 0, and oxygen is oxidised from -2 to 0. c)2MG +0, > 2Mgo 'Mg' is oxidised from 0 to +2 and 'O' is reduced to 0 to -2. d)Ni+H2O-Ni+H2O 'Ni' is reduced from +2 to 0 and 'H' is oxidised from 0 to +1. |
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| 2947. |
Name any types of force when applied on a body |
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Answer» HLO mate here is ur ans.... Contact Forces ---> Action-at-a-Distance ForcesAction-at-a-Distance ForcesFrictional Force--> Gravitational ForceGravitational ForceTension Force--> ELECTRICAL ForceElectrical ForceNormal Force --> Magnetic Force❤️❤️Hope this helps u dear❤️❤️ ✌️Pls Mark as brainliest✌️Don't forget to FOLLOW me :) |
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| 2948. |
State mirror formula how does it change when distance u from the mirror is changed? |
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Answer» Explanation: Mirror FORMULA: ... F does not change when OBJECT distance u from the mirror is changed,this is because the focal LENGTH of the mirror depends upon the curvature of the mirror.please mark me as brainliest |
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| 2949. |
3A= 3i+ 2j -এর (i+j) এবং (i-j) -এর দিকে উপাংশ নির্ণয় করে। |
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Answer» d dndjdndndnddkx. kdkedmcnskdn. ofjdk |
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| 2950. |
Please answer fast Jo bilkul correct answer dega I will follow u |
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