67486 + Interview Questions in Secondary School in Physics

1.	Explain Thrust with the help of an example
Answer» THRUST is defined as to quickly push with force. An EXAMPLE of thrust is to move forward as a CROWD entering a stadium. An example of thrust is to force one's SELF into a conversation. pls folllllllowwww me pls follow....

Discussion

2.	Explain the principal behind sundial?
Answer» HI friend...... here's UR answer.... When the earth rotates about its axis, the sun appears to “move” across the sky, causing objects to CAST shadows. A sundial contains a gnomon, or a thin rod, that casts a shadow onto a platform etched with DIFFERENT times. As the sun changes relative positions over the course of a day, the rod’s shadows change as well, thus reflecting the change in time. Hope it helps.....

Discussion

3.	Define uniform and nonuniform motion along with diagram
Answer» If a BODY TRAVELS EQUAL DISTANCE equal TIME

Discussion

4.	Unit of AC current is
Answer» UNIT of AC CURRENT is AMPERE.

Discussion

5.	three capacitors each of capacitance 6pf are arranged. what would be the value of maximum and minimum capacitances
Answer» HOPE it HELPS hope I'm RIGHT

Discussion

6.	A force of 6n and another of 8N can be applied together to produce the effect of single force
Answer» The FORCE which is giving 6 NEWTON have lesser than 8 Newton APPLIED by another and the 6 Newton

Discussion

7.	Solve this qs. with solution
Answer» Answer: EXPLANATION: SPECIFIC heat=Thermal capacity/Mass So,(8*4.186)/(10/1000)=3360 is the answer, HOPE you understood.

7.

Solve this qs. with solution

Answer»

Answer:

EXPLANATION:

SPECIFIC heat=Thermal capacity/Mass

So,(8*4.186)/(10/1000)=3360 is the answer, HOPE you understood.

Discussion

8.	This is the 2nd time I'm asking this question... please help me out
Answer» We have EQUATION for trajectory------- $y = xtan \: <klux>THETA</klux> \: - \frac{1}{2} \frac{gx {}^{2} }{u {}^{2}cos {}^{2} theta}$ or $y = xtan \: theta - \frac{x {}^{2} }{2u {}^{2} cos {}^{2}theta \frac{1}{g} }$ or $y = xtan \: theta - \frac{x {}^{2} }{2u {}^{2} cos \: theta \: sin \: theta \frac{1}{g} } \frac{sintheta}{costheta}$ or $y = xtantheta - \frac{x {}^{2} tantheta}{<klux>RANGE</klux>}$ or $y = xtantheta(1 - \frac{x}{range} )$ Here... range =x1 + X2 so putting the values we get..... y=x1.tan(theta)[1 - x1/(x1 + x2)] or y= x1.tan theta.[x2/(x1+x2)] => y=x1x2/(x1+x2) . tan theta. that is OPTION (b)

Discussion

9.	a bus decreases the its speed from 80 km per hour to 60 km per hour in 5 second find the acceleration of the bus
Answer» 80 KM / H = 22.23m/s 60 km /h = 16.67 m/s acc. = 16.67-22.23/ 5 = -5.56 / 5 = -1.11 m/s^2

Discussion

10.	What is break down voltage
Answer» HEYAA !!!!!!✌ ✴✴ The BREAKDOWN voltage is the MINIMUM voltage necessary to force an insulator to conduct some amount of electricity. hope it helps you⭐⭐ #APS☺☺

Discussion

11.	Please solve this..............
Answer» 1℃ DIFFERENCE is EQUAL to 1.8°F difference. so SPECIFIC HEAT of SUBSTANCE in cal/gm°F=0.09/1.8=0.05 cal/gm°F.

Discussion

12.	Density of mercury is 13.6gm/cc. Convert into S.I. Units.No spam pls
Answer» Cc=cubic centimetre here is ur answer. S.I.unit of density is kg/m³ 1m=100cm=1 CM = 10-² m 1 Kg = 1000g => 1g = 10-³ Kg now, 13.6 g/cm³ = 13.6 × ( 10-³)/(10-²)³ Kg/m³ = 13.6 × 10-³/10^-6 Kg/m³ = 13.6 × 10^(-3 + 6) Kg/m³ = 13.6 × 10³ Kg/m³ hope it helps U.

Discussion

13.	If area of a plate of a parallel plate capacitor is halved. would this device act as a capacitor
Answer» YES ofcource it will ACT SINCE capcitanceis EQU AL to A£0/d when A is halved c=A£0/2d

Discussion

14.	On what factors does the capacitance of a conductor depends
Answer» #Capacitance of conductor is directly proportional to the area of PLATES. # and capacitance is INVERSELY proportional to the DISTANCE between the plates. # increase with the PERMITTIVITY of dielectric MATERIAL.

Discussion

15.	when a light ray passes from parallel to principal axis falls on concave mirror what is the path ofreflected ray
Answer» WHENEVER the light parallel to the principal AXIS strikes a concave mirror, it bends back and the REFLECTS back through the principal focus or focus . you can GET images regarding this on google . I hope it helped .

15.

when a light ray passes from parallel to principal axis falls on concave mirror what is the path ofreflected ray

Answer»

WHENEVER the light parallel to the principal AXIS strikes a concave mirror, it bends back and the REFLECTS back through the principal focus or focus . you can GET images regarding this on google .

I hope it helped .

Discussion

16.	A car starts with an acceleration of 2m/s2 and it accelerates for 5 seconds and for another 5 seconds it runs with constant velocity and then deaccelerates with 2m/s and finally comes into rest. Find 1.Total distance travelled 2.Average velocity
Answer» u = 0 a = 2m/s² t = 5s S = ut+½at² = 25m v =u+at =0+25 = 10m/s Now, speed = 10m/s Time = 5s Therefore, DISTANCE= st =105 = 50m Again, acceleration=-2m/s² u =10m/s v = 0 Therefore,time = v-u/a = 0-10/-2 = 5 s and, s= v²-u²/2a = -100/2(-2) = 25m 1. TOTAL distance =25+50+25 =100m 2. Avg. Velocity = Total distance/total time = 100/5+5+5 = 100/15 = 6.66m/s

Discussion

17.	a boy uses a vernier calipers to measure the thickness of his pencil. he measures it to be 1.4 mm . If the Zero error of vernier calipers is + 0.02 cm, what is the correct thickness of pencil?
Answer» The CORRECT THICKNESS of the PENCIL MAY br 1. 1.42 and the other possibility is 2. 1.38 since d=1.4+_0.02

Discussion

18.	The energy of a photon corresponding to the maximum wavelength of visible light is?
Answer» $<klux>ENERGY</klux> = \frac{hc}{ a}$ where H is Planck's constant=6.626×10^-34 m/s. me and C is speed of light and a is MAXIMUM WAVELENGTH of visible light which is 8000A°. 8000A°=8×10^3×10^-10=8×10^-7 m. Energy=6.626×10^-34(3×10^8)/8×10^-7 =>Energy =19.878×10^-25/8×10^-7 =>Energy=2.48475×10^-18J.

Discussion

19.	A balloon starts from the ground with an acceleration of 2m/s^2 , after 5 secs a stone is dropped from the balloon , find the time taken by the rock to reach the ground and the total height attained by the balloon when the rock reaches the ground.
Answer» v = u + at a = 2 m/s2 t = 5 u = 0 v = 0 + 2*5 = 10 m/s v² = u² + 2as s = v²/2a s = 100/2 s = 50 m Now acceleration of the stone after being dropped is 9.8 m/so u = - 10 m/s s = 50 m g = 9.8 t = 5 s s = it + 1/2 at By solving you will get TIME (t) Hope it helps you. Mark as brainlist if you like answer.

Discussion

20.	The mass of a planet is 6 times the mass of earth and its radius is three times that the Earth considering acceleration due to gravity on earth to be 9.8 M per second square calculate the value of g on the other planet
Answer» Let MASS of earth be Me and radius of earth be Re. At earth's surface g=GMe/Re^2 Let the mass of the PLANET be M' and radius be R'. At planet's surface g'=GM'/R'^2 according to given CONDITION M'=6Me,R'=3Re g'=G6Me/(3Re)^2 g'=6GMe/9Re^2 g'=GMe/Re^2×6/9 we know GMe/Re^2=g putting in the value of GMe/Re^2 g'=g×6/9 g'=9.8×6/9 g'=6.53m/s^2 hope it HELPS u..... if any query plz let me know......

Discussion

21.	When a body moves in a circle with constant speed. Is it acceleration
Answer» No it is in 0 ACCELERATION... acceleration is when it's SPEED is INCREASING it is CALLED acceleration.....

Discussion

22.	The surface tension of water is 72 dyne per centimetre convert it in the SI unit
Answer» SURFACE tension is 72 DYNE PER cm so 1J=10^7 find hence 1dyne=10^-7 J. 1m=100cm and thus 1cm=10^-2 m. hence surface tension is 72×10^-7÷10^-2 J/m=72× 10^-5J/m in S.I. units

Discussion

23.	Seats of Automobiles are provided with spring system why?
Answer» because when we drive it is used to LESS the SHOCKS by the friction between TYRE and road

Discussion

24.	a body is projected such that k E at thetop most position is half of intinal kE what is the angle of projection with the horizontal
Answer» LET Velocity at the botton be uu Then Kinetic Energy at the BOTTOM is KE=1/2mu2KE=1/2mu2 Now at the top only x-component of velocity is present Let velocity at top be v Then v=root{(UCOS theta)^2}[Theta is the angle] According to problem, (1/2)(1/2mu^2)=1/2mv^2 =>(1/2)u^2=u^2cos^2(theta) =>cos theta=1/root 2 theta=45 degrees

Discussion

25.	What is the si unit of mass
Answer» KILOGRAM, is the SI UNIT of MASS

Discussion

26.	Express the power of 100 watt bulb in CGS unit
Answer» HEY DEAR HERE IS YOUR ANSWER ✌✌❤❤ We know POWER = energy/time watt = jule /sec in C.gs SYSTEM 1 jule = 10^7 erg hence, 100watt = 100 jule/s = 100 × 10^7 erg/s = 10^9 erg/s HOPE IT HELPS U .✌ #BE BRAINLY .❤

Discussion

27.	What is circular motion
Answer» When an OBJECT is moving around in CIRCLE it is called CIRCULAR motion......

Discussion

28.	Seats of Automobiles are provided with spring system why? This question related to force and motion
Answer» ....so to PROVIDE BETTER SUSPENSION

Discussion

29.	Seats of Automobiles are provided with spring system
Answer» This is because it acts as a SECOND SUSPENSION to the person who's is SITTING on the VEHICLE....

Discussion

30.	Find the mass required to generate 1.3 × 10^15 J of energy
Answer» $use \: e = m {c}^{2}$ e is 1.3×10^15 J. c=3×10^8 So c^2=9×10^16. =>1.3×10^15=m×9×10^16 => 1.3×10^15/9×10^16=m =>13/900=m =>1.444×10^-2 kg OR 14.44 GMS is mass REQUIRED to generate 1.3×10^15J of ENERGY.

Discussion

31.	Identify and describe the different modes of heat transfer taking place in the picture given below
Answer» there s no PIC please POST pic of the QUESTION

31.

Identify and describe the different modes of heat transfer taking place in the picture given below

Answer»

there s no PIC

please POST pic of the QUESTION

Discussion

32.	A body falling freely from rest covers 7/16 of total height in the last second of its fall. The height from which it falls is? (g = 9.8 m/s^2)?
Answer» $s = ut + \frac{1}{2} a {t}^{2}$ $\frac{9}{16} = 0 + \frac{1}{2} 9.8 {t}^{2} \\ \frac{18}{16} = 9.8 {t}^{2} \\ \frac{1.83}{16} = {t}^{2} \\ t = \frac{ \sqrt{1.83} }{ \sqrt{16} } \\ t = \frac{1.35}{4}$ hope this will HELP you. further QUERY ask in COMMENT SECTION

Discussion

33.	A uniform rod is suspended by means of two strings of length 0.10 m and 0.06 m attached to its two ends. The other two ends of the strings are tied to a nail. If tension in the first string is 30N,find the tension in the other.
Answer» draw the FREE body diagram . let the MASS of the rod be m . And there are twon tension forces ACTING on it . Now tension in one string is 30 N and second string is T1 (suppose) . now , we get , 30N + T1 - mg = 0 ( body is at REST)(equilibrium) solving this you get T1 = (mg-30 ) N . hope it helped .

33.

A uniform rod is suspended by means of two strings of length 0.10 m and 0.06 m attached to its two ends. The other two ends of the strings are tied to a nail. If tension in the first string is 30N,find the tension in the other.

Answer»

draw the FREE body diagram . let the MASS of the rod be m . And there are twon tension forces ACTING on it . Now tension in one string is 30 N and second string is T1 (suppose) . now , we get ,

30N + T1 - mg = 0 ( body is at REST)(equilibrium)

solving this you get T1 = (mg-30 ) N .

hope it helped .

Discussion

34.	a bock of mass 3kg is lining on floor the coefficient of friction is 0.4 a force of 3 N is applied on the block . Calculate the force of friction between the block and force
Answer» FRICTION FORCE = µ×N = µmg = 0.4×3×10 =12N

34.

a bock of mass 3kg is lining on floor the coefficient of friction is 0.4 a force of 3 N is applied on the block . Calculate the force of friction between the block and force

Answer»

FRICTION FORCE = µ×N

= µmg

= 0.4×3×10

=12N

Discussion

35.	Please answer emergency.....
Answer» Just MULTIPLY by 300 and you GET your ANSWER

Discussion

36.	Plz answer question ...........
Answer» ANSWER will be 15 m. this is 100% RIGHT answer.

Discussion

37.	with suitable example prove that Dimensionaly correct eq does not mean that it is always physical eq.
Answer» A2A It makes sense to say: 4 x (5 oranges) = 20 oranges But it doesn't make sense to say: 4 x (5 oranges) = 20 apples The first one is dimensionally CORRECT - the same type of UNITS are on the left and right. The second one is dimensionally incorrect - there are different TYPES of units on the left and right, which doesn't make sense. _______________________________________... In physics 'dimension' has several meanings. Here, we mean the type of unit: metres, feet, miles, ETC have a dimension of length (L) as they are all used to measure distance (i.e. length) seconds, minutes, months, etc. have a dimension of time (T) kg, pounds, tonnes, etc., have a dimension of mass (M) _______________________________________... For example, speed = distance/time We say the DIMENSIONS of speed (written as [speed]) are L/T. So [speed] = L/T. Acceleration is speed-change/time, so [acceleration] = (L/T)/T = L/T^2 Force is mass x acceleration (F=ma) so [F] = ML/T^2 etc. _______________________________________... For an equation to be valid, the dimensions on the left side must match the dimensions on the right side (just like our oranges example.) It is then dimensionally correct. However an equation can be dimensionally correct but still wrong. For example if I say the area of a circle = 2 x radius^2: - this is dimensionally correct (both sides have dimensions L^2) - but it is wrong, as '2' should be 'pi'. On the other hand, if an equation is dimensionally incorrect, it must be wrong.

Discussion

38.	two force of 5 kgs and 10 kgs are acting at an angle of 120 degree calculate the magnitude and direction of the resultant force
Answer» 5 KG = 50 KGF. 10kg = 100kgf. R = √50²+100²+ 250100cos120 = √2500+10000-5000= 86.69N. b. tan∆ = 50/100 ∆= 1/tan(1/2) I HOPE THIS ANSWER WILL HELP YOU

Discussion

39.	Check the correctness of eq f = mt + mv
Answer» Unit of MV = KG m / s unit of mt = kg s the EQUATION is not valid as no quantities can be ADDED whose units and dimensions are not same hope it helps !! ❤️

Discussion

40.	the velocity time relationship of a body starting from rest is given by v=k^2t^3/2,where k is √2m^1/2 /s^5/2,Find the distance traversed by the body in 4 seconds
Answer» The velocity time RELATIONSHIP of a BODY starting from REST is given by $v=k^2t^{3/2}$ , here $k=\frac{\sqrt{2}m^{1/2}}{s^{5/2}}$ Let's PUT value of k in equation , $v=2ms^{-5}t^{3/2}\\\\\frac{dx}{dt}=2ms^{-5}t^{3/2}\\\\\int{dx}=\int{2ms^{-5}t^{3/2}dt}$ $\int\limits^x_0{dx}=\int\limits^4_0{2ms^{-5}t^{3/2}dt}$ $x=\left[\begin{array}{c}\frac{2mt^{5/2}}{\frac{5}{2}s^5}\end{array}\right]^4_0$ $x=\frac{4m}{5s^5}(2)^5$

Discussion

41.	Why the colour of sky is blue
Answer» Heya! => Why the sky is blue in colour?????? ¿ Answer : <> As we know , our earth's ATMOSPHERE consists of so many gases like N2 , O2 ........ <> Also, we know sunlight is a MIXTURE of rainbow colours <> When the sunlight reaches earth's atmosphere These ATMOSPHERIC gases scatters themore amount of red light is scattered <> But, we cannot SEE it with our eyes... <> Next, blue / purple colour is scattered in more amount... So, now we are seeing the blue sky!! Hope it hlpz..

Discussion

42.	Light propogates linearly because of its
Answer» Curspular PROPERTY of light i.e light goes in straight line with packet packet let say you throw someone water with PIPE it is continuous in curspular property you throw water in PAUSE (PACKETS of water) in same INTERVAL

Discussion

43.	light of wavelength 4000 angstrom falls on the surface of a metal if the threshold wavelength required for emission of photoelectrons from the metal is 6600 Armstrong calculate the kinetic energy of photoelectrons emitted. Please answer immediately
Answer» FIFI to do so do to do do GO

Discussion

44.	1 Watt-hour is equal to 3600 Joules prove
Answer» HEY DEAR YOUR ANSWER IS HERE The watt-hour (symbolized Wh) is a unit of energy equivalent to one watt(1 W) of power expended for one hour(1 h) of TIME. The watt-hour is not a STANDARD unit in any formal system, but it is commonly used in electrical applications. An energy EXPENDITURE of1 Wh represents 3600 joules (3.600 x 103 J).

Discussion

45.	find the y component of the velocity at the position x=1m for the motion of particle along the curve y=x²-2x+4, if x component of velocity is 3m/s.
Answer» 4m/sec is this CORRECT

Discussion

46.	By how much will loudness of sound change when amplitude of vibration is a)tripled b)doubled
Answer» Here your ANSWER.......B)DOUBLED

Discussion

47.	a bus starting from rest attains a speed of 36 km per hour and covers a distance of 10meter find its acceleration and time taken
Answer» TIME TAKEN = 3.6s ACCLERATION= 10m/s

Discussion

48.	Filling of ink into a fountain pen
Answer» USE a DROPPER ,it is AVAILABLE in STATIONARY STORES

Discussion

49.	A p.d. of 10V is needed to make a current of 0.02A flow through same wire. What p.d. is needed to make current if 250mA flow through the same wire?
Answer» Answer: Hope it HELPS PLEASE mark as BRAINLIEST

49.

A p.d. of 10V is needed to make a current of 0.02A flow through same wire. What p.d. is needed to make current if 250mA flow through the same wire?

Answer»

Answer:

Hope it HELPS

PLEASE mark as BRAINLIEST

Discussion

50.	There is one scooter it has 2 tyres one stepni each tyre can run 200 kms how long a scooter can run
Answer» There is one scooter it has TWO tyres and one stepni. so, there are three tyres . assume name of A , B and C for batter understanding. as given, each TYRE can run 200km. so, there are three CASES possible to run scooter. case 1 :- Scooter can run 100km with A and B. case 2 :- scooter can run 100km with B and C. case 3 :- scooter can run 100km with C and A. hence, scooter can run (100 + 100 + 100) km = 300km

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Explain Thrust with the help of an example

Explain the principal behind sundial?

Define uniform and nonuniform motion along with diagram

Unit of AC current is

three capacitors each of capacitance 6pf are arranged. what would be the value of maximum and minimum capacitances

A force of 6n and another of 8N can be applied together to produce the effect of single force

Solve this qs. with solution

This is the 2nd time I'm asking this question... please help me out

a bus decreases the its speed from 80 km per hour to 60 km per hour in 5 second find the acceleration of the bus

What is break down voltage

Please solve this..............

Density of mercury is 13.6gm/cc. Convert into S.I. Units.No spam pls

If area of a plate of a parallel plate capacitor is halved. would this device act as a capacitor

On what factors does the capacitance of a conductor depends

when a light ray passes from parallel to principal axis falls on concave mirror what is the path ofreflected ray

A car starts with an acceleration of 2m/s2 and it accelerates for 5 seconds and for another 5 seconds it runs with constant velocity and then deaccelerates with 2m/s and finally comes into rest. Find 1.Total distance travelled 2.Average velocity

a boy uses a vernier calipers to measure the thickness of his pencil. he measures it to be 1.4 mm . If the Zero error of vernier calipers is + 0.02 cm, what is the correct thickness of pencil?

The energy of a photon corresponding to the maximum wavelength of visible light is?

A balloon starts from the ground with an acceleration of 2m/s^2 , after 5 secs a stone is dropped from the balloon , find the time taken by the rock to reach the ground and the total height attained by the balloon when the rock reaches the ground.

The mass of a planet is 6 times the mass of earth and its radius is three times that the Earth considering acceleration due to gravity on earth to be 9.8 M per second square calculate the value of g on the other planet

When a body moves in a circle with constant speed. Is it acceleration

The surface tension of water is 72 dyne per centimetre convert it in the SI unit

Seats of Automobiles are provided with spring system why?

a body is projected such that k E at thetop most position is half of intinal kE what is the angle of projection with the horizontal

What is the si unit of mass

Express the power of 100 watt bulb in CGS unit

What is circular motion

Seats of Automobiles are provided with spring system why? This question related to force and motion

Seats of Automobiles are provided with spring system

Find the mass required to generate 1.3 × 10^15 J of energy

Identify and describe the different modes of heat transfer taking place in the picture given below

A body falling freely from rest covers 7/16 of total height in the last second of its fall. The height from which it falls is? (g = 9.8 m/s^2)?

A uniform rod is suspended by means of two strings of length 0.10 m and 0.06 m attached to its two ends. The other two ends of the strings are tied to a nail. If tension in the first string is 30N,find the tension in the other.

a bock of mass 3kg is lining on floor the coefficient of friction is 0.4 a force of 3 N is applied on the block . Calculate the force of friction between the block and force

Please answer emergency.....

Plz answer question ...........

with suitable example prove that Dimensionaly correct eq does not mean that it is always physical eq.

two force of 5 kgs and 10 kgs are acting at an angle of 120 degree calculate the magnitude and direction of the resultant force

Check the correctness of eq f = mt + mv

the velocity time relationship of a body starting from rest is given by v=k^2t^3/2,where k is √2m^1/2 /s^5/2,Find the distance traversed by the body in 4 seconds

Why the colour of sky is blue

Light propogates linearly because of its

light of wavelength 4000 angstrom falls on the surface of a metal if the threshold wavelength required for emission of photoelectrons from the metal is 6600 Armstrong calculate the kinetic energy of photoelectrons emitted. Please answer immediately

1 Watt-hour is equal to 3600 Joules prove

find the y component of the velocity at the position x=1m for the motion of particle along the curve y=x²-2x+4, if x component of velocity is 3m/s.

By how much will loudness of sound change when amplitude of vibration is a)tripled b)doubled

a bus starting from rest attains a speed of 36 km per hour and covers a distance of 10meter find its acceleration and time taken

Filling of ink into a fountain pen

A p.d. of 10V is needed to make a current of 0.02A flow through same wire. What p.d. is needed to make current if 250mA flow through the same wire?

There is one scooter it has 2 tyres one stepni each tyre can run 200 kms how long a scooter can run