67486 + Interview Questions in Secondary School in Physics

1.	Two cells of emf 1.5 V and 2V and internal resistance 1 ohm and 2 ohm respectively are connected in parallel to pass a current in the same direction through an external resistance of 5 ohm.Find current through the external resistance.
Answer» E = 2.5*2/3 = 5/3 V then I = 5/3 / 5 = 1/3A

Discussion

2.	Calculating momentum of a body waiting 5 kg when its velocity decreases from 20 kg 20 seconds to 0.18 seconds
Answer» 20 kg - 5 kg = 15 kg 20 sec - 0.18 sec =0.2 sec m= 15 ×0.2 = 3

Discussion

3.	Normal force condition describe
Answer» The normal force is the SUPPORT force exerted upon an object that is in CONTACT with another stable object. For example, if a BOOK is RESTING upon a surface, then the surface is exerting an upward force upon the book in ORDER to support the weight of the book.

Discussion

4.	A cyclist moving on a circular track of radius 100m to complete one revolution in4min. find average speed and velocity
Answer» The TOTAL LENGTH of the circular track = 2πr = 2π(100) = 200π metres Total time taken = 4 MINUTES = 240 seconds Average speed = distance/time = 200π/240 = 5π/6 m/s = 2.6 m/s Average velocity = displacement/time = 0/240 = 0 m/s Therefore the average speed is 2.6 m/s and average velocity is 0 m/s. Hope it helps!!

4.

A cyclist moving on a circular track of radius 100m to complete one revolution in4min. find average speed and velocity

Answer»

The TOTAL LENGTH of the circular track = 2πr = 2π(100) = 200π metres

Total time taken = 4 MINUTES = 240 seconds

Average speed = distance/time = 200π/240 = 5π/6 m/s = 2.6 m/s

Average velocity = displacement/time = 0/240 = 0 m/s

Therefore the average speed is 2.6 m/s and average velocity is 0 m/s.

Hope it helps!!

Discussion

5.	What is difference between e.m.f. and terminal voltage
Answer» ELECTROMOTIVE Force (emf) is the energy (work) given by an electric cell to flow a unit charge in the whole circuit (containing cell). Terminal Voltage is the work DONE by an electric cell to flow a unit charge between TWO POINTS of a circuit. So, difference between EMF and Terminal Voltage is that EMF is measured for whole circuit WHEREAS Terminal Voltage is measured for two points of a circuit. We can say that all the Terminal Voltages of a cell form a EMF. Thus, E = V1 + V2 + V3 + V4 +..........+ Vn. ●●●●●●●●●●●●●●●●●●●●●●●●● Hope it was helpful.

Discussion

6.	In the circuit shown here the point c is kept connected to point a
Answer» FIRST attach a pic of the circuit OKAY then QUESTION anybody

Discussion

7.	Calculate gravitational frce on a mass of kg lying on surface of earth if mass of earth is 6×10^24 and radius of earth is 6400km
Answer» I THINK IT WILL BE 9.375e20

Discussion

8.	S= t^2 + 5t + 3 then find ds/dt
Answer» HEY.... ds/dt=2t+5 HOPE its HELP U..

Discussion

9.	Four quadrant and sign conventions
Answer» Hiiiii dear______ good afternoon_________✌️✌️ 1. In Quadrant I, x > 0, y > 0 (+x,+y) 2. In Quadrant II, x < 0, y > 0 (-x,+y) 3 . In Quadrant III, x < 0, y < 0 (-x,-y) 4. In Quadrant IV, x > 0, y < 0 (+x,-y) thanks and regards AJay B.tech, IIT BHU

Discussion

10.	A charge q is uniformly distributed on a thin spherical shell
Answer»

Discussion

11.	A car tavels along a straight line with speed 40km/h from a to b and return back from b to a with speed of60km/h . find rhe average speed.
Answer»

Discussion

12.	A car moving with a speed of 40 km per hour can be stopped by applying brakes after at least two metres of the same car is moving with a speed of 80 km per hour what is the minimum stop distance
Answer» The CCAR speed is doubled. THEREFORE the distance travelled by car after applying brakes will also be doubled. Therefore the LEAST distance covered will be 4 metres

Discussion

13.	A car cover 1002 km in 16 hours what is the speed of car
Answer»

Discussion

14.	A wire length l and radius r is welded to another wire of length
Answer» RESISTANCE INCREASES because LENGTH increases. Resistance is DIRECTLY PROPORTIONAL to length

Discussion

15.	If s= ut +1/2 at^2 where u and a are constant obtained the values of ds/ dt?
Answer» Ds/dt = 1/2 ×2at+ U RULE of DIFFERENTIATION =>>> dy/dt = x^3 dy/dt=nx^3-1

Discussion

16.	S= t^2 + 5 + 3 find ds/ dt
Answer» HEY GUYS... your ANS... ds/dt=2t....

Discussion

17.	A bpdy is released from top or a tower of height h m. after 2s it is stopped and then instantaneously released
Answer» ATQ u=0 Since, s = UT + 1/2 at^2 Therefore, h = (0) × 2 + 1/2 × 10 × 2 × 2 h = 10 × 2 h = 20 METRE

Discussion

18.	A bullet moving with a velocity of 200 m per second penetrates a wooden block and comes to rest after travelling for centimetres inside it what velocity is needed for travelling distance of 9 cm in same block
Answer» Dear Student, Given VELOCITY = 200 cm/sec Initial velocity = 0 From the NETWON's THIRD Law of equation V^2- U^2 = 2as 40000 = 8 a a = 5000 cm/sec^2 v^2 = 40000+ 90000 V^2 = 130000 V = 100√13 cm/sec This would be the velocity. Cheers!! Regards, AJay (B.tech SECOND year, IIT(BHU)VARANASI )

Discussion

19.	A bus starts moving with an acceleration of 1m/s^2for 5minutes.calculate the speed aquited and the distance travelled by bus
Answer» Acceleration=1m/s^2. time=5min=300sec. by FORMULA v=u+at. v=0 + 1x300=300m/s. distance traveled=ut +1/2at^2. =0+1/2(1)(300^2) =90000/2=45000m

Discussion

20.	At what temperature do the fahrenheit and kelvin scales coincide
Answer» The FARENHEIT and KELVIN SCALES concides at -40

Discussion

21.	It is easier to push a lighter box then a heavy box on same floor
Answer» DUE to its mass that is easier to PUSH lighter box then a HEAVY box on same FLOOR

Discussion

22.	Explain the correct answer
Answer» #(36.) u=0 a=1.8m/s^2 S=10m v^2=u^2-2as v^2= 0-2×1.8×10 v^2=-16 v=-4 m/s #(37.) speed at 10 m(v1)= -4m/s speed at 20m(v2) = 0 Distance is directly proportional to the square of speed=> s= u^2 OPTION d is correct. #(38.) u= -4m/s v^2 = (-4)^2-2×1.8×10 v^2= 16-16 =0

Discussion

23.	A body is so projected in air that the horizontal range covered by the body is equal to the maximum vertical height attained by the body during the motion the angle of projection is?
Answer» HOPE it HELPS you..... :)......

Discussion

24.	A body cools from 100 to 90 in 10 minutes and from 90 to 80 in 15 minutes find.the temperature of surrounding is
Answer» Let the ROOM TEMPERATURE of be Ф The change in temperature of the BODY from (100 - Ф) to (90 - Ф) is (10 - 2Ф) Thus the cooling rate is : (10 - 2Ф) / 10 From (90 - Ф) to (80 - Ф) we have : (10 - 2Ф) / 15 Equating the two 100 - 20 = 150 - 30Ф 50 = 10Ф Ф = 5°

Discussion

25.	A block is placed on a rough horizontal surface.the minimum force required to slide the block is
Answer» LET the frictional constant of surface is U and mass of BODY is m. so minimum force REQUIRED is friction due to surface. so minimum force =UMG newton.

Discussion

26.	A car moving on a straight path covers a distance of 1km due east find the speed and velocity
Answer» PLEASE COMPLETE your QUESTION....

Discussion

27.	a super fast train 140m long crossing a long tunnel of 450 m in 20 sec what would be the speed of trian
Answer» S= d/t=( 140+450)/20=590/20=59/2= 29.5 m/sec Will be the ANSWER

Discussion

28.	Asteroid belt is a region in the solar system that exists between the orbits of
Answer» The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the PLANETS Mars and JUPITER. It is OCCUPIED by numerous irregularly shaped bodies called asteroids or MINOR planets. if you LIKE my answer Mark me as the brainliest

Discussion

29.	Name two non ohmic materials
Answer» SUBSTANCES that don't follow OHM' LAW are called non OHMIC substances. 1/Vaccum tubes 2/ thermistors. 3/crystal RECTIFIER...

Discussion

30.	Which angle in a prism is known as the angle of the prism
Answer» $hy\\friend$ The TWO plane faces are called are the refracting faces and the angle INCLUDED between these two faces is called the angle of PRISM. $In the below figure$ ABC represents the PRINCIPAL section of a glass-prism having ∠A as its angle of prism. $thankyou\\be brainly$

30.

Which angle in a prism is known as the angle of the prism

Answer»

$hy\\friend$

The TWO plane faces are called are the refracting faces and the angle INCLUDED between these two faces is called the angle of PRISM.

$In the below figure$

ABC represents the PRINCIPAL section of a glass-prism having

∠A as its angle of prism.

$thankyou\\be brainly$

Discussion

31.	If x=2t^3and y=3t^2 , then value of dy/dx is
Answer» FOLLOW the ATTACHMENT

Discussion

32.	A rail road car is moving with a constant acceleration
Answer» YES,,,, a railroad car is moving with a CONSTANT ACCELERATION..... because in railroad ... in train wheel was made by magnet.... ❇❇❇❇❇❇❇❇❇❇❇

Discussion

33.	Pls answer......I will mark brainliest...2 parsec is how many many light years???Pls show calculations also...
Answer» As ONE parsec is equal 3.26 that's ×2 6.52 light YEARS HOPE this HELPS

Discussion

34.	A ball is tgrown vertically upwards woth a speed of 14.6m/s from the top of a towre returns to the earth in 6s.find the height of the tower..
Answer» HEYA!! ---------- Given that , INITIAL velocity U = 14.6 m/s. Time t = 6 sec Final velocity V = 0 H = ? ---------------------------------------------------------------------------------------------------- Now using the SECOND equation of motion, $s = ut + \frac{1}{2} at {}^{2}$ -H = 14.6 × 6 + 1/2 × -9.8 × 36 = 88.8 m ----------------------------------------------------------------------------------------------------

Discussion

35.	which are indirect methods to understand the interior of the earth? 1. meteorites 2.gravitation 3. magnetic field
Answer» I THINK the ANSWER is 2.Meteorites

Discussion

36.	A train travels 15km at a uniform speed of 30km/h the next 75km at a uniform speed of 50km/h &the last 10km at a uniform speed of 20km/h. Calculate the average speed of the entire journey.
Answer»

Discussion

37.	An water bubble in water behaves like a concave lens
Answer» Hey MATE... Here is your answer QUESTION == An water bubble in water behaves like a concave lens EXPLANATION == Since air is optically rarer than water, the ray of light bends away from the normal at the POINT of incidence when moving from water to air while it bends towards the normal while moving from air to water. ... It is clearly visible that the air bubble acts as a DIVERGING LENS (concave lens) in water. I HOPE IT WILL HELP YOU #YAHYAAHMAD#

Discussion

38.	Distance travelled by light in 5 microseconds..please explain with clear steps.
Answer» HOPE this HELPS the LIGHT TRAVELS 15x10^5 METRES

Discussion

39.	the velocity time graph for of a train journey is a horizontal straight line. what does this tell you about the train's velocity and about it acceleration?
Answer» ʜᴇʟʟᴏ ᴍᴀᴛᴇ! The HORIZONTAL line OBTAINED in velocity - TIME graph represents :- 1. The TRAIN is moving with uniform motion. Means that body is covering equal distance in equal interval of time 2. The train has no acceleration. Because constant velocity means no acceleration or no CHANGE in velocity Hence, velocity = constant Acceleration = "0" Hope it helps

Discussion

40.	The speed of the car is 72kmh-1 express it in ms-1
Answer» 72 KILOMETRES in 1 hour which MEANS 72000 m in 3600s. so answer is 72000/3600=20 m/s.

Discussion

41.	A man in a car sees a door,a golden door,a diamond door and a silver door, which door will he open first
Answer» Wo first mai uska CAR ka DOOR kholega .......then silver ,GOLDEN & diamond jo bhi USKI choice hogi wo kholega.......lekin first mai uski car ka door OPEN krega....

Discussion

42.	Uses of multiple reflection of sound?
Answer» USED in AUDITORIUM for BETTER SOUND EFFECT

Discussion

43.	A car accelerates uniformly from rest for 5s; then it travel at a steady velocity for 5s
Answer» What U WANT to CALCULATE

Discussion

44.	Llz solve this easy question quickly
Answer» MINIMUM F = un n=mg minimum FORCE > UMG

Discussion

45.	The object of equal mass (m) are located at the three corners
Answer» Then CENTRE of the MASS is at centre.

Discussion

46.	A cameta converts brighteness and color in which signal
Answer» Hello Dear... A CAMERA CONVERTS BRIGHTNESS and colour with the HELP of "LUMINANCE signal"... please mark me....

Discussion

47.	What is the internal resitance of an ideal voltage source and ideal current source ?
Answer» The internal RESISTANCE of an ideal current source is infinite. An INDEPENDENT current source with zerocurrent is identical to an ideal open CIRCUIT. The voltage across an ideal current source is COMPLETELY determined by the circuit it is connected to.

Discussion

48.	A body is projected horizontally with speed 20 m per second what will be its speed after 5 seconds
Answer» Since, body is projected horizontally with a velocity of 20m/s. ux = 20m/s ax = 0 So, vx = 20m/s for all time. Along VERTICAL AXIS, uy = 0 t = 5 ay = 10m/s2 vy =? vy = uy +ayt => vy = 0 + 10*5= 50m/s So, MAGNITUDE of velocity of body after 5s √{(50)²+(20)²}m/s =√2900 m/s =53.851 m/s = 54 m/s (APPROX)

Discussion

49.	A ball is thrown horizontally with a velocity of 15 m/s what will be vertical and horizontal components of it's velocity in 0.3 second
Answer» As there are no force acting on the body in the horizontal direction therefore the horizontal component of the VELOCITY will remain the same . in the VERTICAL direction the gravitational force is acting therefore using v = u +at (where u = 0 m/s , t= 0.3 sec , a=g = 9.8 m/sec^2) v= 0.39.8 v= 2.94 m/sec vertically DOWNWARD towards earth velocity after 0.3 seconds. the velocity will become inclined to angle 45 with the horizontal when the vertical and horizontal components of the velocity will become equal v horizontal = v vertical 15 = u +at ( u=0 , a=g=9.8 m/sec) 15 = 9.8t t = 1.53 seconds View Full Answer

Discussion

50.	stone dropped from the top of the tower touches the ground in 4 seconds. The height of the tower is about
Answer» ANS. 40m Am I RIGHT DEAR?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Two cells of emf 1.5 V and 2V and internal resistance 1 ohm and 2 ohm respectively are connected in parallel to pass a current in the same direction through an external resistance of 5 ohm.Find current through the external resistance.

Calculating momentum of a body waiting 5 kg when its velocity decreases from 20 kg 20 seconds to 0.18 seconds

Normal force condition describe

A cyclist moving on a circular track of radius 100m to complete one revolution in4min. find average speed and velocity

What is difference between e.m.f. and terminal voltage

In the circuit shown here the point c is kept connected to point a

Calculate gravitational frce on a mass of kg lying on surface of earth if mass of earth is 6×10^24 and radius of earth is 6400km

S= t^2 + 5t + 3 then find ds/dt

Four quadrant and sign conventions

A charge q is uniformly distributed on a thin spherical shell

A car tavels along a straight line with speed 40km/h from a to b and return back from b to a with speed of60km/h . find rhe average speed.

A car moving with a speed of 40 km per hour can be stopped by applying brakes after at least two metres of the same car is moving with a speed of 80 km per hour what is the minimum stop distance

A car cover 1002 km in 16 hours what is the speed of car

A wire length l and radius r is welded to another wire of length

If s= ut +1/2 at^2 where u and a are constant obtained the values of ds/ dt?

S= t^2 + 5 + 3 find ds/ dt

A bpdy is released from top or a tower of height h m. after 2s it is stopped and then instantaneously released

A bullet moving with a velocity of 200 m per second penetrates a wooden block and comes to rest after travelling for centimetres inside it what velocity is needed for travelling distance of 9 cm in same block

A bus starts moving with an acceleration of 1m/s^2for 5minutes.calculate the speed aquited and the distance travelled by bus

At what temperature do the fahrenheit and kelvin scales coincide

It is easier to push a lighter box then a heavy box on same floor

Explain the correct answer

A body is so projected in air that the horizontal range covered by the body is equal to the maximum vertical height attained by the body during the motion the angle of projection is?

A body cools from 100 to 90 in 10 minutes and from 90 to 80 in 15 minutes find.the temperature of surrounding is

A block is placed on a rough horizontal surface.the minimum force required to slide the block is

A car moving on a straight path covers a distance of 1km due east find the speed and velocity

a super fast train 140m long crossing a long tunnel of 450 m in 20 sec what would be the speed of trian

Asteroid belt is a region in the solar system that exists between the orbits of

Name two non ohmic materials

Which angle in a prism is known as the angle of the prism

If x=2t^3and y=3t^2 , then value of dy/dx is

A rail road car is moving with a constant acceleration

Pls answer......I will mark brainliest...2 parsec is how many many light years???Pls show calculations also...

A ball is tgrown vertically upwards woth a speed of 14.6m/s from the top of a towre returns to the earth in 6s.find the height of the tower..

which are indirect methods to understand the interior of the earth? 1. meteorites 2.gravitation 3. magnetic field

A train travels 15km at a uniform speed of 30km/h the next 75km at a uniform speed of 50km/h &the last 10km at a uniform speed of 20km/h. Calculate the average speed of the entire journey.

An water bubble in water behaves like a concave lens

Distance travelled by light in 5 microseconds..please explain with clear steps.

the velocity time graph for of a train journey is a horizontal straight line. what does this tell you about the train's velocity and about it acceleration?

The speed of the car is 72kmh-1 express it in ms-1

A man in a car sees a door,a golden door,a diamond door and a silver door, which door will he open first

Uses of multiple reflection of sound?

A car accelerates uniformly from rest for 5s; then it travel at a steady velocity for 5s

Llz solve this easy question quickly

The object of equal mass (m) are located at the three corners

A cameta converts brighteness and color in which signal

What is the internal resitance of an ideal voltage source and ideal current source ?

A body is projected horizontally with speed 20 m per second what will be its speed after 5 seconds

A ball is thrown horizontally with a velocity of 15 m/s what will be vertical and horizontal components of it's velocity in 0.3 second

stone dropped from the top of the tower touches the ground in 4 seconds. The height of the tower is about