67486 + Interview Questions in Secondary School in Physics

1.	A nine years has 32 tereh
Answer» What are U teying to ASK BROTHER TELL me then i can HELP u

Discussion

2.	Give reason: soft water lathers with soap but not the hard water
Answer» YES because the DENSITY of SOFT WATER is LESS..

Discussion

3.	The position of a perticle is given by s =[t^3-6t^2+9t find total dist ance in first five second
Answer» ANSWER: The DISTANCE TRAVELLED in FIRST five seconds is 15 m.

Discussion

4.	Which type is motion is smoke from chimney
Answer» It is the EXAMPLE of RANDOM MOTION..... I HOPE I HELPED You

Discussion

5.	The distance between two stations is 240km. A train takes 4 hours to cover this distance. Calculate the speed of train
Answer» SPEED = Distance/Time Distance= 240km Time= 4 hours Speed = 240/4 km/h = 60 km/h

Discussion

6.	Harmful effects of mobile radiations on environment
Answer» There are no harmful effects of mobile radiation on the environment it effects our brain nah,its just a myth if u increase the height of the mobile by 100 ft it WOULD burn out the WHOLE city by its radiation but the regular mobile u USE wont AFFECT anything

Discussion

7.	Diffusion of solids in liquids and gases
Answer» Diffusion in Gases: Diffusion in gases is very FAST. This is because the particles in gases move very QUICKLY in all directions.The rate of diffusion of a gas, however, depends on its density. Light gases diffuse faster than heavy gases.Example: When we light an incense stick (agarbatti) in a CORNER of our room, its fragrance spreads in the whole room very quickly due to the diffusion of its smoke into the air. Diffusion in liquids: Diffusion in liquids is slower than that in gases. This is because the particles in liquids move SLOWLY as compared to the particles in gases.Example: The spreading of PURPLE colour of potassium permanganate into water, on its own, is due to the diffusion of potassium permanganate particles into water.

Discussion

8.	if resistance of wire A is 4 times the resistance of wire B calculate the ratio of the cross-sectional areas of the wire and the ratio of the radii of the wires
Answer» Explanation: Some scales, such as the traditional beam balance, measure mass directly by COUNTERACTING the downward force by another equal downward force on the OPPOSITE side of the PIVOT. On a beam balance, you add enough mass to the opposite pan to COUNTERBALANCE the unknown mass. No force is measured.

8.

if resistance of wire A is 4 times the resistance of wire B calculate the ratio of the cross-sectional areas of the wire and the ratio of the radii of the wires

Answer»

Explanation:

Some scales, such as the traditional beam balance, measure mass directly by COUNTERACTING the downward force by another equal downward force on the OPPOSITE side of the PIVOT. On a beam balance, you add enough mass to the opposite pan to COUNTERBALANCE the unknown mass. No force is measured.

Discussion

9.	A particle is moving in a circular path of radius r what would it’s displaceme
Answer» This is INCOMPLETE QUESTION

Discussion

10.	Formula of capacitor fast
Answer» Q=CV is the REQUIRED FORMULA HOPE it HELPS

Discussion

11.	Plzz answer Question 9
Answer» The law of momentum CONSERVATION can be stated as follows. For a collision occurring between object 1 and object 2 in an ISOLATED SYSTEM, the TOTAL momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. 2 mass of body velocity of body

Discussion

12.	The procces of utilization of absorbed nutrients in the living cell
Answer» I THINK that there ain't a PROPER tem. it's just METABOLISM

Discussion

13.	A body strats from rest.the ration of distance travelled by body during fourth an 3rd second is what?
Answer» 16:9 is the RATIO......

Discussion

14.	Excretion organ of tape worm is
Answer» FLAME CELLS is the ANSWER

Discussion

15.	The change in position of an object with time is called what?
Answer» The CHANGE in position of an object with TIME is called AVERAGE VELOCITY.

Discussion

16.	Explain the following heating devices are made up of an alloy rather than a pure metal
Answer» Because PURE METAL has more CONDUCTIVITY than ALLOY

Discussion

17.	An object is dropped from a cliff moves down with an acceleration of 10m/s square.Find its speed after 2 seconds it was dropped.
Answer» U=0m/s g= 10m/s (replaced from a) t=2seconds V=? To FIND “v” v=u +at v= 0 +2x10 =20m/s V

Discussion

18.	What will be the range of electromagnetic force?
Answer» The WEAK Force. One of the FOUR fundamental forces, the weak interaction involves the exchange of the intermediate vector bosons, the W and the Z. SINCE the mass of these particles is on the order of 80 GeV, the uncertainty principle dictates a rangeof about 10-18 METERS which is about 0.1% of the diameter of a proton ..

Discussion

19.	Water kept in a dish evaporates faster than water kept in a bottale
Answer»

Discussion

20.	When you rub your hands you experience heat being given out. Why?
Answer» DUE to FRICTION . That ' s a REASON my DEAR FRIEND.

Discussion

21.	Give few examples of sliding friction
Answer» The few examples are: 1.rubing our hands. 2.sking in mountain. 3.when the books are pushed from table. 4.a boy sliding FORM a slide.. I HOPE I HELPED YOU.....

Discussion

22.	What do you understand by uniform circular motion? Give at least two examples.
Answer» When a body moves in a circle with CONSTANT SPEED is known as the uniform circular motion. Ex --- Revolution of Earth . (2). Movement of BLADES of fan.

Discussion

23.	A car travelling at 60km /h uniformly retards for 10s and reaches a velocity of 45 km/h. Find the retardation
Answer» HEY there here is your answer initial velocity (U) = 60km/h = 50/3 m/s final velocity (v) = 45km/h = 25/2 m/s time = 10 s retardation or negative ACCELERATION = v-u/t = 25/2 - 50/3 ÷10 =75-100 /60 = -25/60 = -5/12 = 0.416 m/s^2 hope it HELPS

Discussion

24.	an electric train is moving with an velocity of 120 km per hour how much distance will it cover in 30 seconds
Answer» Volicity = 120 km/h 120×5/18 m/s TIME = 30SEC DISTANCE = 120×5×30/18 1000m

Discussion

25.	Give a vector perpendicular to i + j+ k.....fast pls
Answer» HEYA friend it can be any VECTOR depending upon the direction of vector or component U can FIND by right hand thumbroll

Discussion

26.	By catching a fast moving ball player pulls the hand backward give reason
Answer» By moving the hand with the ball, the PLAYER reduces the force exerted on his PALM by the ball by GRADUALLY REDUCING momentum of the ball. If he wouldn't do this, then chances are more of him getting injured. if momentum reduces gradually, force exerted is LESSER.

Discussion

27.	A rectangular piece of wood measures 4cm by 6cm by 8cm and has a mass of 20g .what is the density of the piece of wood?
Answer» VOLUME= 4x6x8 = 184 density= 184/20 = 10/92 = 5/26 5.26gcm

Discussion

28.	A wire of resistance 5ohm is bent in the form of a closed circle what is the effective resistance between the two points at any end of diameyer of a circle
Answer» ◆HOPE IT HELPS. ◆PLEASE MARK AS BRAINLIEST.

Discussion

29.	Pls...Answer...................
Answer» B) 24J as work DONE is force *displacement

Discussion

30.	What is the role of atmospheric pressure when you drink through a straw?GIVING 30 PTS FOR A BETTER ANSNEED 2- 3 LINESNO SPAMMING PLEASE
Answer» When you suck on a straw stuck into liquid, it lowers the pressure in the straw. That MAKES atmospheric pressure HIGHER than the pressure in the straw, which FORCES the liquid to go up into the straw, and into your mouth.

Discussion

31.	A vector perpendicular to î+ j+k
Answer» It can be any vector DEPENDING UPON vector direction and y can see by right hand THUMB ROLL

Discussion

32.	A train 240m long running at a speed of 60km/h will take how much time to cross another train
Answer» The SPEED of TRAIN =60kmph=3.33*5=16.65m/s. time=distance/speed=240/16.65=14.41sec

Discussion

33.	Answer following Only graph
Answer» the TIME of starting 5 SEC is the time when the body is accelarating bcoz the slope is UPWARD. HERE IS YOUR ANSWER HOPE IT HELPS

Discussion

34.	What is kinetic energy with it's si unit
Answer»

Discussion

35.	1) the force on an electron kept in an electric field in a particular direction is F.What will be the magnitude of force experienced by a proton kept at the same point in the field? Mass of the proton is about 1836 times that of the electron.2) An electric dipole of dipole moment 20 * 10-6 Cm is enclosed by a closed surface.What is the net flux coming out of the surface?plz help me in answering these questions...
Answer» 1. same F , electric force does not DEPEND on mass of the object.. 2_. ZERO because the TOTAL net charge enclosed by a closed surface E.ds = q INSIDE /€

Discussion

36.	Who is Adolf Hitler and what he was
Answer» Adolf HITLER 20 April 1889 – 30 April 1945)was an Austrian-born GERMAN politician andthe leader of the National SOCIALIST German Workers PARTY (German: Nationalsozialistische Deutsche Arbeiterpar... I hope it is helpful

Discussion

37.	Solve two question and find answer
Answer» Area Under the Curve mathematically means that we have to find the definite integral with the given limits. We asked to find the area under the curve $y=5e^x$ , the X-Axis, and between $x=0$ and $x=2$ In other words, we have to find the Integral of $5e^x$ with limits as $x=0$ to $x=2$ [A graph is attached for visual representation] Let the Area be $A$ Then we have: $\displaystyle A = \int\limits_0^2 5e^x \, dx \\ \\ \\ \implies A=5\left[\, e^x\, \right]_0^2 \\ \\ \\ \implies A=5[e^2-e^0]\\ \\ \\ \implies \boxed{\bold{A=5(e^2-1) \, \, sq. \, units}}$ Thus, The Answer is Option (C). __________________________________ In the second QUESTION, we are given that a car starts from rest, and moves with constant ACCELERATION. Let us suppose the constant acceleration $a$ . Let distance covered in n seconds be denoted by $s_n$ Then, we have: $\displaystyle s=ut+\frac{1}{2}at^2 \\ \\ \\ \implies s_n =(0)(n)+\frac{1}{2}a(n)^2 \ \\ \\ \implies \boxed{s_n = \frac{an^2}{2}}$ Now, We need the RATIO of distance travelled in $n^{th}$ second (say $s_{n^{th}}$ ) to the distance travelled in $n$ seconds ( $s_n$ ) To get the distance travelled in $n^{th}$ second, we will use this logic: Distance travelled in the nth second is EQUAL to the distance travelled in (n-1) seconds subtracted from the distance travelled in n seconds. That is, $s_{n^{th}}=s_n-s_{n-1}$ For EXAMPLE, suppose we want to find the distance travelled in the 4th second. Then we first find the distance travelled in complete 4 seconds, and from it, we subtract the distance travelled in 3 seconds. Now, we can get the answer. $\displaystyle Ans = \frac{s_{n^{th}}}{s_n} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{s_n-s_{n-1}}{s_n} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{\frac{an^2}{2}-\frac{a(n-1)^2}{2}}{\frac{an^2}{2}}\\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{n^2-(n-1)^2}{n^2} \\ \\ \\ \left[\text{Using the Identity }a^2-b^2=(a+b)(a-b)\right] \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{(n+n-1)(n-n+1)}{n^2} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{(2n-1)(1)}{n^2}$ $\displaystyle \implies \frac{s_{n^{th}}}{s_n} = \frac{2n-1}{n^2} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{2n}{n^2}-\frac{1}{n^2} \\ \\ \\ \implies \boxed{\bold{\frac{s_{n^{th}}}{s_n}=\frac{2}{n}-\frac{1}{n^2}}}$ Thus, The answer is Option (C)

37.

Solve two question and find answer

Answer»

Area Under the Curve mathematically means that we have to find the definite integral with the given limits.

We asked to find the area under the curve $y=5e^x$ , the X-Axis, and between $x=0$ and $x=2$

In other words, we have to find the Integral of $5e^x$ with limits as $x=0$ to $x=2$

[A graph is attached for visual representation]

Let the Area be $A$

Then we have:

$\displaystyle A = \int\limits_0^2 5e^x \, dx \\ \\ \\ \implies A=5\left[\, e^x\, \right]_0^2 \\ \\ \\ \implies A=5[e^2-e^0]\\ \\ \\ \implies \boxed{\bold{A=5(e^2-1) \, \, sq. \, units}}$

Thus, The Answer is Option (C).

__________________________________

In the second QUESTION, we are given that a car starts from rest, and moves with constant ACCELERATION.

Let us suppose the constant acceleration $a$ .

Let distance covered in n seconds be denoted by $s_n$

Then, we have:

$\displaystyle s=ut+\frac{1}{2}at^2 \\ \\ \\ \implies s_n =(0)(n)+\frac{1}{2}a(n)^2 \ \\ \\ \implies \boxed{s_n = \frac{an^2}{2}}$

Now, We need the RATIO of distance travelled in $n^{th}$ second (say $s_{n^{th}}$ ) to the distance travelled in $n$ seconds ( $s_n$ )

To get the distance travelled in $n^{th}$ second, we will use this logic:

Distance travelled in the nth second is EQUAL to the distance travelled in (n-1) seconds subtracted from the distance travelled in n seconds.

That is,

$s_{n^{th}}=s_n-s_{n-1}$

For EXAMPLE, suppose we want to find the distance travelled in the 4th second. Then we first find the distance travelled in complete 4 seconds, and from it, we subtract the distance travelled in 3 seconds.

Now, we can get the answer.

$\displaystyle Ans = \frac{s_{n^{th}}}{s_n} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{s_n-s_{n-1}}{s_n} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{\frac{an^2}{2}-\frac{a(n-1)^2}{2}}{\frac{an^2}{2}}\\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{n^2-(n-1)^2}{n^2} \\ \\ \\ \left[\text{Using the Identity }a^2-b^2=(a+b)(a-b)\right] \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{(n+n-1)(n-n+1)}{n^2} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{(2n-1)(1)}{n^2}$

$\displaystyle \implies \frac{s_{n^{th}}}{s_n} = \frac{2n-1}{n^2} \\ \\ \\ \implies \frac{s_{n^{th}}}{s_n} = \frac{2n}{n^2}-\frac{1}{n^2} \\ \\ \\ \implies \boxed{\bold{\frac{s_{n^{th}}}{s_n}=\frac{2}{n}-\frac{1}{n^2}}}$

Thus, The answer is Option (C)

Discussion

38.	How to convert 1 dyne into newton using dimensional analysis
Answer» 1 N = 1 kg m s-2 1 dyne = 1 g cm s-21 kg = 1000 g, 1 m = 100 cm;1 N = 1000 X 100 g cm s-2 = 105 g cm s-2:. 1N = 105 dyne, u can convert dyne to NEWTON by HELL of this formula

Discussion

39.	How to learn physics
Answer» Physics is the subject of visualisation. if you VISUALISE it properly it will become easier than EVER before. if you want to learn physics more clearly you can PREFER h. c. VERMA book. it's nice. hope this helps you

Discussion

40.	An air bubble inside water behaves as a which lens
Answer» An AIR BUBBLE INSIDE WATER behaves as concave lens

Discussion

41.	A long solenoid carrying a current of 2a has 1000 turns per metre the magnetic fileld inside solenoid
Answer» I HOPE it can HELP you and PLEASE FOLLOW me

Discussion

42.	A given length of a wire is doubled on itself what will the impact on its resistivity
Answer» RESESTANCE will be DOUBLE

Discussion

43.	A bulb when current is run away then the light bulb is lightening name?
Answer» It will be be KNOWN as DARKNESS bulb. mark it BRAINLIEST PLZZ.........

Discussion

44.	A body is projected at an angle theta the max height
Answer» A BODY PROJECTED with velocity v and ANGLE be x formula to determine height is (usinx)^2/2g so for x=π/2 max.height occurs I.e $\frac{ {u}^{2} }{2g}$ hope this will help you.

Discussion

45.	A body dropped from top of a tower fall through 40 m during the last two seconds of its fall.the height of tower is
Answer» HOPE this will HELP you

Discussion

46.	A body is projected from ground at an angle x with vertical
Answer» I THINK ANGLE should be at 90

Discussion

47.	A ball is thrown horizontally from the top of a tower and strikes the ground in 3 second at an angle of 30° with the vertical find the height of the tower and find the speed with which the body was projected
Answer» Explanation: Thrown horizontally: Vertical component of velocity present only due to acceleration due to gravity. H= 1/2gt^2 H= 1/210*9 H= 45m Assuming HORIZONTAL velocity of PROJECTION of the body to be =u, the vertical component of velocity reached in moving for 3S =>v=gt=10×3=30m/s => tan30=1/√3=v/u u=√3×30 u=51.9615243m/s

47.

A ball is thrown horizontally from the top of a tower and strikes the ground in 3 second at an angle of 30° with the vertical find the height of the tower and find the speed with which the body was projected

Answer»

Explanation:

Thrown horizontally: Vertical component of velocity present only due to acceleration due to gravity.

H= 1/2*gt^2

H= 1/2*10*9

H= 45m

Assuming HORIZONTAL velocity of PROJECTION of the body to be =u,

the vertical component of velocity reached in moving for 3S

=>v=gt=10×3=30m/s

=> tan30=1/√3=v/u

u=√3×30

u=51.9615243m/s

Discussion

48.	Can the average speed of a moving body be zero
Answer» No AVERAGE speed CANT be zero but average velocity can be zero if you like then plz mark as BRILIANT

Discussion

49.	A racing car has a uniform acceleration of 4cm/s-2. What distance will it cover in 10sec after start?
Answer» A=4cm/s^-2 t=10 sec. initial VELOCITY be 0 then s=ut+1/2at^2 s=0+1/2 ×4 ×100 200 cm=2m so CAR will COVER 2m in 10 sec. hope this will help you.

Discussion

50.	Hii...What is physics ??☺️
Answer» Physics is basically the study of physical quantity. Physics is the branch of science concerned with the NATURE and properties of matter and ENERGY. The SUBJECT matter of physics includes mechanics, heat, light and other RADIATION, sound, electricity, magnetism, and the structure of atoms. Hope it helps; :0

50.

Hii...What is physics ??☺️

Answer»

Physics is basically the study of physical quantity.

Physics is the branch of science concerned with the NATURE and properties of matter and ENERGY. The SUBJECT matter of physics includes mechanics, heat, light and other RADIATION, sound, electricity, magnetism, and the structure of atoms.

Hope it helps;

:0

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A nine years has 32 tereh

Give reason: soft water lathers with soap but not the hard water

The position of a perticle is given by s =[t^3-6t^2+9t find total dist ance in first five second

Which type is motion is smoke from chimney

The distance between two stations is 240km. A train takes 4 hours to cover this distance. Calculate the speed of train

Harmful effects of mobile radiations on environment

Diffusion of solids in liquids and gases

if resistance of wire A is 4 times the resistance of wire B calculate the ratio of the cross-sectional areas of the wire and the ratio of the radii of the wires

A particle is moving in a circular path of radius r what would it’s displaceme

Formula of capacitor fast

Plzz answer Question 9

The procces of utilization of absorbed nutrients in the living cell

A body strats from rest.the ration of distance travelled by body during fourth an 3rd second is what?

Excretion organ of tape worm is

The change in position of an object with time is called what?

Explain the following heating devices are made up of an alloy rather than a pure metal

An object is dropped from a cliff moves down with an acceleration of 10m/s square.Find its speed after 2 seconds it was dropped.

What will be the range of electromagnetic force?

Water kept in a dish evaporates faster than water kept in a bottale

When you rub your hands you experience heat being given out. Why?

Give few examples of sliding friction

What do you understand by uniform circular motion? Give at least two examples.

A car travelling at 60km /h uniformly retards for 10s and reaches a velocity of 45 km/h. Find the retardation

an electric train is moving with an velocity of 120 km per hour how much distance will it cover in 30 seconds

Give a vector perpendicular to i + j+ k.....fast pls

By catching a fast moving ball player pulls the hand backward give reason

A rectangular piece of wood measures 4cm by 6cm by 8cm and has a mass of 20g .what is the density of the piece of wood?

A wire of resistance 5ohm is bent in the form of a closed circle what is the effective resistance between the two points at any end of diameyer of a circle

Pls...Answer...................

What is the role of atmospheric pressure when you drink through a straw?GIVING 30 PTS FOR A BETTER ANSNEED 2- 3 LINESNO SPAMMING PLEASE

A vector perpendicular to î+ j+k

A train 240m long running at a speed of 60km/h will take how much time to cross another train

Answer following Only graph

What is kinetic energy with it's si unit

Who is Adolf Hitler and what he was

Solve two question and find answer

How to convert 1 dyne into newton using dimensional analysis

How to learn physics

An air bubble inside water behaves as a which lens

A long solenoid carrying a current of 2a has 1000 turns per metre the magnetic fileld inside solenoid

A given length of a wire is doubled on itself what will the impact on its resistivity

A bulb when current is run away then the light bulb is lightening name?

A body is projected at an angle theta the max height

A body dropped from top of a tower fall through 40 m during the last two seconds of its fall.the height of tower is

A body is projected from ground at an angle x with vertical

A ball is thrown horizontally from the top of a tower and strikes the ground in 3 second at an angle of 30° with the vertical find the height of the tower and find the speed with which the body was projected

Can the average speed of a moving body be zero

A racing car has a uniform acceleration of 4cm/s-2. What distance will it cover in 10sec after start?

Hii...What is physics ??☺️