67486 + Interview Questions in Secondary School in Physics

1.	A farmer moves along the boundary of a square field of side 10 m in 40 seconds what will be the magnitude of displacement of the farmers at the end of 2 minutes 20 seconds
Answer» Total distance = perimeter of square= 4×10m=40m. Time taken=40s Therefore, total time taken by farmer =2min 20seconds=140 seconds Therefore,140/40=3.5 Therefore the farmer completes 3 and half round of the square,i.e.,if he starts from A he reaches point c after 2 min 20 seconds. Therefore,DISPLACEMENT is AC. To find AC ,assume a triangle ADC inside a square . In triangle ADC AC square is equal to AD square +DC square AC square = (10)2+ (10)2 AC square= 100+100 AC square= 200 =10√2m.

Discussion

2.	A man cover a distance of 24km at the speed of 8km/hr and a distance of 18 km at the speed of 9 km/hr. further he covers a distance of 12 km at the speed of 3km/ hr. what is his average speed in covering whole distance
Answer» A man COVERS 24 km at speed of 8 km now we have to devide the 8 to 24 the answer is 3 h another 18 devide by 9 is 2h another 12 devide by 3 is 4h distance COVER 42 km TAKE a TIME is 9 h

Discussion

3.	Difference between periodic and oscillatory motion.(3 points)
Answer» 1.-oscillatory refers to SOMETHING that moves BACK and forth repeatedly.while periodic refers to something that REPEATS after a REGULAR amount of time.... 2.-oscillatory motion will almost certainly be periodic ,not all periodic motion are oscillatory

Discussion

4.	a particle starts moving with constant velocity v=2 m/s from position x=5m.The position time graph will be????
Answer» The correct one is (c) , we have seen that any p-t GRAPH where the velocity is CONSTANT the graph gives a straight line, here in option (a) the position is given as -5, as we know that displacement is a SCALAR quantity and hence cannot be negative , looking at option (b) the graph shows a negative velocity so the option (b) can possibly be correct but if the question said that the vehicle has returned to its INITIAL position ( displacement = final - initial ) coming to option (c) the graph gives a straight line as said earlier, it clarifies that the velocity is constant, and also the starting point to be 5M

Discussion

5.	A electic toaster of resistance 20 ohm takes a current of 5a. calculate the heat developed in 30 s. a bulb is rated at 5v,100a.calculate its power & resistance.
Answer» R = 20 ohm i = 5A t = 30s $h = i {}^{2} rt$ $h = 5 {}^{2} \times 20 \times 30$ $h = 15000j$ Heat DEVELOPED by heater is 15000 j. V = 5v i = 100 A R = V / i = 5 / 100 R = 0.05 ohm Resistance of bulb is 0.05 ohms P = V i = 5 × 100 = 500w Power of bulb is 500 w. Thanks

Discussion

6.	A fabric is made up of fibre arranged together which are further made up of what
Answer» Fibres are a part of our diet , its SOMETHING which falls under the category 'roughage' it is basically a dietry material contains CELLULOSE, lignin, and pectin. if I SUM up, imagine about synthetic fibres , aren't they all made up of long polymer chains? similarly a fibre I also a molecule (more LIKE glucose) that FORMS natural fibres.

Discussion

7.	A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel . Then lift starts moving upwards with an acceleration 1.0m/s*2 ,the tension in the supporting cable is :
Answer» LET the mass of man be m1 = 60 kg mass of the lift be M2 = 940 kg total mass M = m1+m2= 60+940= 1000 Kg acceleration DUE to GRAVITY = 9.8 m/s^2 acceleration of lift = - 1 m/s^2 T - mg = ma T= ma + mg T= m(a+g) T= 1000(10.8) T= 10800N

Discussion

8.	What are the examples of biology science???
Answer» Anatomy. Astrobiology. Biochemistry. Biogeography. Biological engineering. Biomechanics. Biophysics. Biotechnology. Please MARK me as BRAINLIEST

Discussion

9.	if frequency f, velocity v and density D are considered as fundamental units the dimensional formula for Momentum will be???
Answer» MLT^-1....................

Discussion

10.	A particle displacement S along x-axis varies with time T according to relation s= 2(1-2t)t the velocity of the particle when it return to its initial point of a start is
Answer» SOLUTION – s = 2(1 - 2t)t s = (2 - 4t) t s = 2t - 4t² v = d(s)/dt $v = \: \frac{d \: (2t - 4 {t}^{2} )}{dt}$ v = (2 - 8t) m/s

Discussion

11.	What is illuminance?
Answer» Hey here is your answer ================================= Illuminated is a TERM that describes the measurement of the amount of light falling ONTO (illuminating) and spreading over a given SURFACE area. ==================================== HOPE IT WILL HELP PLEASE MARK IT AS BRAINLIEST

Discussion

12.	When a body is moving in a circular orbit work done will be???
Answer» When a body is movind in a CIRCULAR ORBIT, ZERO work is DONE.....

Discussion

13.	an object experiences a net zero force. is it possible for the obj move with a constant speed along straight line
Answer» YES it is POSSIBLE for the OBJECT

Discussion

14.	A car moves with a speed of 60km/hr in east and with the same speed fir 30min in south. the displacement of car from initial position is
Answer» i guess this is ryt. speed = 60km/hr Time (t1)= 1hr , time(t2)=30min= 30/60= 1/2 hr Distance travelled by a CAR in East DIRECTION(s1)= speed× t1 = 60× 1= 60km Distance travelled by a car in SOUTH direction(s2)= speed× t1 = 60×1/2= 30 km Displacement from intial position(s)= √(s1)²+(s²)²= √ (60)²+(30)² = √3600+900 = √900(4+1) = 30√5 Displacement= 30√5km The displacement of car from INITIAL position is 30√5km_

14.

A car moves with a speed of 60km/hr in east and with the same speed fir 30min in south. the displacement of car from initial position is

Answer»

i guess this is ryt.

speed = 60km/hr

Time (t1)= 1hr , time(t2)=30min= 30/60= 1/2 hr

Distance travelled by a CAR in East DIRECTION(s1)= speed× t1 = 60× 1= 60km

Distance travelled by a car in SOUTH direction(s2)= speed× t1 = 60×1/2= 30 km

Displacement from intial position(s)= √(s1)²+(s²)²= √ (60)²+(30)²

= √3600+900

= √900(4+1)

= 30√5

Displacement= 30√5km

The displacement of car from INITIAL position is 30√5km_

Discussion

15.	A ball is thrown vertically upwards with velocity 20m/s from the top of a mulltistorey building.the height of the point from where the ball is thrown is 25 m from the ground,how high will the ball rise
Answer» The height of the point from where the ball is THROWN is 25.0m from the ground. (a) How high will the ball RISE? (b) how long will it be before the ball hits the ground? ... The ball will reach 20 m high from the point of projection. It reaches 20 + 20.5 ... v = √(20² + 2×10×25) v = 30 m/s

Discussion

16.	A 12 bit adc is used to convert analog voltage of 0 to 10 v into digital. the resolution is
Answer» this is the ANSWER HOPE it HELPS .

16.

A 12 bit adc is used to convert analog voltage of 0 to 10 v into digital. the resolution is

Answer»

this is the ANSWER HOPE it HELPS .

Discussion

17.	A bicycle is moving on a straight road at constant speed the wheel of the cycle exhibit which motion
Answer» Here is your answer- The wheel of the cycle exhibting "CIRCULAR MOTION." HOPE IT HELPS YOU. MARK IT AS BRAINLIEST.

Discussion

18.	Three vector p ,q, r are such that p=q ,r =√2p and p+q+r =0 the angle between p and q, q and r and p and r are1) 90°,135°,135°2) 90°,45°,45°3)45°,90°,90°4)45°135°,135°
Answer» ANSWER is OPTION NUMBER 1

Discussion

19.	A car is traveling with the speed of u m/s stops in a distance s with the retardation a.If the car travelles with the speed five u m/s,what distance will the car stop with the same retardation?
Answer» This is the ANSWER of UR QUESTION

Discussion

20.	Vector P - Vector Q = Vector R and P=Q=R then find the ratio of angles between Vector P&R to Vector P&Q
Answer» ANSWER: ANGLE RATIO is 90DEGREE

20.

Vector P - Vector Q = Vector R and P=Q=R then find the ratio of angles between Vector P&R to Vector P&Q

Answer»

ANSWER:

ANGLE RATIO is 90DEGREE

Discussion

21.	Why the second image formed is the brightest one in a thick plane mirror?
Answer» Answer: ... The second image is formed after reflection from rear SILVERED SURFACE, which sends maximum AMOUNT of light. Hope it helps U.. Mark it as BRAINLEST answer

Discussion

22.	a gun of mass 3 kg fires a bullet of mass 30gm. The bullet takes 0.003 sec to move through the barrel of the gun and acquires a velocity of 100m/s. Calculate - 1.the velocity with which the gun recoil. 2. the force exerted on the gun man due to recoil of gun.. PLZ solve it
Answer» 1. velocity with which gun RECOILS is 1m/s . mass of gun * velocity of gun = mass of BULLET * velocity of bullet 3 * V = 30/1000 100 3v = 0.03100 3v = 3/100*100 3v=3 v=3/3 v=1

Discussion

23.	What do we mean f=ma
Answer» Newton's second LAW of motion describes the relationship between an object's MASS and the AMOUNT of force needed to accelerate it. Newton's second law is often stated as F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object TIMES its acceleration (a). This means the more mass an object has, the more force you need to accelerate it. And the GREATER the force, the greater the object's acceleration

Discussion

24.	Could nayone please tell about inertia
Answer» It's the tendency to do nothing or to remain unchanged.Inertia is the quality in MATTER that lets it to STAY still if it is still or keeps it moving if it is moving.If you want to OVERCOME inertia, you have to APPLY force

Discussion

25.	Choose correct option
Answer» $\huge{\colorbox{pink}{Answer}}$ the correct answer is 1 + 2 + 3..................(x - 1). Because,An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1). An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For EXAMPLE: An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For example:When an atom has 5 energy LEVELS, the total number of lines in its spectrum will be 1+2+3+4=10.

25.

Choose correct option

Answer»

$\huge{\colorbox{pink}{Answer}}$

the correct answer is 1 + 2 + 3..................(x - 1).

Because,An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).

An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For EXAMPLE:

An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For example:When an atom has 5 energy LEVELS, the total number of lines in its spectrum will be 1+2+3+4=10.

Discussion

26.	14 points❇Force on a current carrying conductor in magnetic field which rule is playing(a)Left hand rule(b)Right hand rule(c)Electro magnetic induction(d)Right left rule.
Answer» _________________________ Force on a current carrying conductor in MAGNETIC FIELD "ELECTROMAGNETIC INDUCTION rule" show this.... This rule says current carrying conductor PLACED in a magnetic field experiences a force ________________________

Discussion

27.	Name the force which helps thing to move and stop
Answer» Gravitional FORCE ................

Discussion

28.	a stone dropped in a well hits the water surface after 2s . what is the depth of the the well and with what speed will the stone hit the water surface ? assume the uniform acceleration due to gravity to be 9.8m/s^2.
Answer» HIIII dear________❤️❤️❤️❤️ good evening____________________ ✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️ U = 0 t = 2sec a = -g = 9.8m/s^2 S = ut + 1/2at^2 S = 0 + (-19.6) S = -19.6m V = u + at v = -19.6 m/s as body is falling from a height so , depth of the well will be 19.6m and speed with which it STRIKES the SURFACE of water = 19.6m/s

Discussion

29.	Solve these question please
Answer» 1.b and 2.is d and 3.is a

Discussion

30.	SI and CGS unit of workdone ?
Answer» SI UNIT is Joul. CGS unit is ERG.

30.

SI and CGS unit of workdone ?

Answer»

SI UNIT is Joul.

CGS unit is ERG.

Discussion

31.	three blocks 1,2,and 3 rest on horizontal frictionless surface each block has mass market and the blocks are connected by massless string block 3 is pulled to right by a force for the resultant force on block 2 is
Answer» The INITIAL VELOCITY, u = 0. Now, USING laws of motion, you can get the answer without much effort. The explanation is in the PICTURE below↓ Hope it helps!!

31.

three blocks 1,2,and 3 rest on horizontal frictionless surface each block has mass market and the blocks are connected by massless string block 3 is pulled to right by a force for the resultant force on block 2 is

Answer»

The INITIAL VELOCITY, u = 0.

Now, USING laws of motion, you can get the answer without much effort.

The explanation is in the PICTURE below↓

Hope it helps!!

Discussion

32.	Model question for motion in a straight line
Answer» GO on the WEBSITE www.quantumstudy.com for practice questions in any SUBJECT ( science BASED ) .

Discussion

33.	A simple pendulum of length l is pulled aside to make an angle θ with the vertical. Find the magnitude of the torque of the weight w of the bob about the point of suspension. When is torque zero ?
Answer» *Given in the question :-* Simple pendulum is suspended there by a rigid support. Weight = W (Hanging) Now, $\theta$ At the angle , the TOTAL torque is working on the point of suspension. i = F × r The weight of the bob is W *Now, The torque of the weight at the point of suspension .* $= r * w$ $= wl. sin\theta$ Here the torque direction is PERPENDICULAR to the plane. *Hence When the body passes by suspension points, then at the lowest point of suspension the given torque will leads to be Zero.* *Hope it Helps . :-)*

33.

A simple pendulum of length l is pulled aside to make an angle θ with the vertical. Find the magnitude of the torque of the weight w of the bob about the point of suspension. When is torque zero ?

Answer»

Given in the question :-

Simple pendulum is suspended there by a rigid support.

Weight = W (Hanging)

Now,

$\theta$ At the angle , the TOTAL torque is working on the point of suspension.

i = F × r

The weight of the bob is W

Now, The torque of the weight at the point of suspension .

$= r * w$

$= wl. sin\theta$

Here the torque direction is PERPENDICULAR to the plane.

Hence When the body passes by suspension points, then at the lowest point of suspension the given torque will leads to be Zero.

Hope it Helps . :-)

Discussion

34.	a piece of stone is thrown from the top of a tower with a horizontal speed of 10 root3 m/s it is found that at a point along the path the velocity vector of the stone makes an angle of 30degreee with horizontal the point p is reached in time t which is given
Answer» ANSWER is 1 second and SOLUTION is GIVEN in the picture

Discussion

35.	Answer with explaination
Answer» $A/c \\ 44t = \frac{1}{2} \times 2 \times {t}^{2} \\ 44t = {t }^{2} \\ 44 = t \\ time = 44seconds$ this is the ANSWER

Discussion

36.	State the possible effects of unbalanced forces
Answer» When an UNBALANCED force acts on an OBJECT, it CAUSES the object to move. It sets the object in motion. If the object is already in motion, the speed and the direction (not ALWAYS) of the object will change.

Discussion

37.	Pls answer fastgive reasons False ceiling keeps the room warm during winters.i will mark the brainliest for the correct answer
Answer» An air gap is formed between the two ceilings. Since air is a bad CONDUCTOR of HEAT, the heat of the ROOM remains trapped within. Please MARK me as BRAINLIEST

Discussion

38.	A man runs around exact half the circumference of a circular park of diameter 40m.What is the displacement of the man? Please Answer....!!
Answer» Given Dia of circular park=40m Distance travelled by man = a half of the Circumference As we KNOW the displacement is the minimum distance between starting point and end point So displacement will be equal to Dia of the circular park So Displacement =40m For more understanding CHECK the image This is ur ans hope it will HELP you in case of any doubt comment below

Discussion

39.	a wire whose resistance is 80 ohm is cut into 3 pieces of equal length which are arranged in parallel calculate the resistance of combination
Answer» HOPE that it HELPS you

Discussion

40.	Stare the possible effects of equal and opposite balanced foeces
Answer» If equal and opposite forces act on a BODY in motion, its motion is not affected. If the body is at rest, it CONTINUES in the state of rest. Please MARK me as BRAINLIEST

Discussion

41.	A piece of ice slides down a 45° inclined plane in twice the time to slide down a frictionless 45° incline. What is the coefficient of friction b\|w the ice and the incline ?
Answer» ANS. u=1/√2 if this is RIGHT then I will show you IMAGE of sol. I put N=Mg whereas N=mgcos45 now I got the ANSWER.

Discussion

42.	you are given a 8 ohm resistorwhat length of constantan wire of resistance 120 ohm/m should be joined in parallel with it to get a value of 6 ohm
Answer» HOPE THIS HELPS....... CLICK ON THE RED HEART IF YOU LIKE THE ANSWER

Discussion

43.	Why weight of a body becomes zero at the centre of earth?
Answer» WEIGHT of a BODY w= mg m is the mass, g is acceleration DUE to gravity. in center of EARTH the value of g is zero(0) so, weight w= 0 { but the mass is not zero}

Discussion

44.	a ball of 0. 25 kg attached to the end of the string of length 1. 96 M is moving in a horizontal circle the string will break if the tension is more than 25 Newton what is the maximum speed with which the ball can be moved????
Answer» M = 0.25 kg r = 1.96 m v = ? T = F = 25 N T=F=MV^2/r v = √F×r/m = √25×1.96/0.25 = √196 = 14 m/s

Discussion

45.	Solve this questions
Answer» Your PICTURE is not CLEAR.....

Discussion

46.	A car with vertical windshield moves along in a rain storm at a speed of 40 km per hour The Rain drops fall vertically with the terminal speed of 20 m per second the angle at which the raindrops strike the windshield is
Answer» Hey FRIEND UR ANSWER is 180 DEGREE

Discussion

47.	Solve my 1st que with steps asap
Answer» A-B=4i+3k $\sqrt{4 {}^{2} + 3 {}^{2} }$ 5

Discussion

48.	When does a spring exert force upon objects attached to its ends???
Answer» Because it DEPENDS on the MASS of the OBJECT

Discussion

49.	Plzzzz yrrr koi to help kro mere
Answer» It's LIKE a WHEATSTONE ridge so 1/R = 1/18+1/12 R = 36/5

Discussion

50.	X player 64 @ speed of 20 m per second so that its horizontal range is maximum another play 24 m away in the direction of kick start earning in the same direction at the same instant of it if he has to catch the ball just before it reaches the ground should run with velocity is equal to
Answer» we know that the range is MAXIMUM WHEN THE ANGLE BETWEEN PROJECTILE AND THE HORIZONTAL IS 45 *. SO , horizontal range of the ball = u ^2 sin2x / g i.e. EQUAL to (20 X 20 x sin 2(45) ) /2 = 200 m . Now we know that ball will land on ground 200 m away from player . Let us now calculate the time it takes to REACH that position , we know the formula of time of flight = 2 u sin x/g putting values you will get 2 root 2 secs i.e equal to 2.8 seconds . now we see that ball takes 2.8 seconds to land 200 m away from player 1 . player two is already 24 m away from player 1 . so the ball will land ( 200-24)m away from him . it will be equal to 176 m, . now he has to catch the ball before landing . he has to cover 176m in 2.8 seconds . we know the relation between speed , dist. and time . i.e. s=d/t .... solving this you will get s= 176/2.8 i.e. 6.2 m / sec. There might be a CALCULATION error maybe but you have to follow the same PROCEDURE .

50.

X player 64 @ speed of 20 m per second so that its horizontal range is maximum another play 24 m away in the direction of kick start earning in the same direction at the same instant of it if he has to catch the ball just before it reaches the ground should run with velocity is equal to

Answer»

we know that the range is MAXIMUM WHEN THE ANGLE BETWEEN PROJECTILE AND THE HORIZONTAL IS 45 *. SO , horizontal range of the ball = u ^2 sin2x / g i.e. EQUAL to (20 X 20 x sin 2(45) ) /2 = 200 m . Now we know that ball will land on ground 200 m away from player . Let us now calculate the time it takes to REACH that position , we know the formula of time of flight = 2 u sin x/g

putting values you will get 2 root 2 secs i.e equal to 2.8 seconds . now we see that ball takes 2.8 seconds to land 200 m away from player 1 . player two is already 24 m away from player 1 . so the ball will land ( 200-24)m away from him . it will be equal to 176 m, . now he has to catch the ball before landing . he has to cover 176m in 2.8 seconds . we know the relation between speed , dist. and time . i.e. s=d/t .... solving this you will get s= 176/2.8 i.e. 6.2 m / sec.

There might be a CALCULATION error maybe but you have to follow the same PROCEDURE .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A farmer moves along the boundary of a square field of side 10 m in 40 seconds what will be the magnitude of displacement of the farmers at the end of 2 minutes 20 seconds

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a particle starts moving with constant velocity v=2 m/s from position x=5m.The position time graph will be????

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Vector P - Vector Q = Vector R and P=Q=R then find the ratio of angles between Vector P&R to Vector P&Q

Why the second image formed is the brightest one in a thick plane mirror?

a gun of mass 3 kg fires a bullet of mass 30gm. The bullet takes 0.003 sec to move through the barrel of the gun and acquires a velocity of 100m/s. Calculate - 1.the velocity with which the gun recoil. 2. the force exerted on the gun man due to recoil of gun.. PLZ solve it

What do we mean f=ma

Could nayone please tell about inertia

Choose correct option

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Name the force which helps thing to move and stop

a stone dropped in a well hits the water surface after 2s . what is the depth of the the well and with what speed will the stone hit the water surface ? assume the uniform acceleration due to gravity to be 9.8m/s^2.

Solve these question please

SI and CGS unit of workdone ?

three blocks 1,2,and 3 rest on horizontal frictionless surface each block has mass market and the blocks are connected by massless string block 3 is pulled to right by a force for the resultant force on block 2 is

Model question for motion in a straight line

A simple pendulum of length l is pulled aside to make an angle θ with the vertical. Find the magnitude of the torque of the weight w of the bob about the point of suspension. When is torque zero ?

a piece of stone is thrown from the top of a tower with a horizontal speed of 10 root3 m/s it is found that at a point along the path the velocity vector of the stone makes an angle of 30degreee with horizontal the point p is reached in time t which is given

Answer with explaination

State the possible effects of unbalanced forces

Pls answer fastgive reasons False ceiling keeps the room warm during winters.i will mark the brainliest for the correct answer

A man runs around exact half the circumference of a circular park of diameter 40m.What is the displacement of the man? Please Answer....!!

a wire whose resistance is 80 ohm is cut into 3 pieces of equal length which are arranged in parallel calculate the resistance of combination

Stare the possible effects of equal and opposite balanced foeces

A piece of ice slides down a 45° inclined plane in twice the time to slide down a frictionless 45° incline. What is the coefficient of friction b|w the ice and the incline ?

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Why weight of a body becomes zero at the centre of earth?

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Solve this questions

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When does a spring exert force upon objects attached to its ends???

Plzzzz yrrr koi to help kro mere

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