67486 + Interview Questions in Secondary School in Physics

1.	Define potential energy and give an example
Answer» The energy possesed by a BODY in rest position..is known as potential energy...eg.a BIRD SITTING on tree

Discussion

2.	Relative velocity of two moving objects in opposite direction
Answer» If the two OBJECTS move in opposite direction at different speeds If the speed of 1st OBJECT = x km/hr and Speed of 2nd object = y km/hr Therefore, their RELATIVE speed = (x + y) km/hr We know, speed of one object with respect to another is CALLED relative speed. If DISTANCE between them = d km, then Time after which the two objects meet = d km/(x + y) km/hr If time after which they meet is given i.e., time = t hours Then distance covered in ‘t’ hours = time × relative speed = t hours × (x + y) km/hr

Discussion

3.	Give the behaviour of wire under increasing the load or stress strain curveusing the above graph
Answer» $\text{[math]}$ here's your answer____________________ to study the behaviour of the wire under increasing the load draw a GRAPH between the stress and strain the graph is as shown in the figure 1) proportionality limit :(A) upto. A stress is directly proportional to strain and the wire based the hooks law 2) elastic limit :(B) in the region A, B the wire does not affect the hooks law but it is against the ORIGINAL length when load is removed 3) yield POINT:(C) the point where the elasticity and sand the plasticity begins is called as a yield point 4) permanent set :(OP) the permanent increasing length of the wire after removing the load is called as a permanent set $OP = l$ 5) breaking point: the point in the graph with the wire BREAKS 6) breaking stress: the stress required to break the wire $breaking \: stress = \frac{breaking \: force}{area}$ 7) elastic fatigue the temporary loss of elastic property due to the replated strain hope it may help u be brainly

Discussion

4.	Write balanced equations for the reaction of Sodium Potassium and calcium in cold water
Answer» HEY MATE.. 2Na+2H2O-2NaOH+H2 2K+2H2O-2KOH+H2 2Ca+2H2O-Ca(OH)2+H2 HOPE IT HELPS...☺

Discussion

5.	a particle of mass m moving with speed v towards east strike another particle of same mass moving with same speed towards north .after striking 2 particles fuse together .with what speed this new particle of mass 2 m will move in North East direction .
Answer» V/2 m/s SPEED . HOPE it HELPS

Discussion

6.	Describe three different ways to produce in the induced current in a coil of wire
Answer» The different WAYS to induce current in a coil are as follows. i) moving a magnet towards the coil set up a current in the coil circuit. ii) if a coil is more RAPIDLY between the two poles of a horseshoe magnet, then electric current is INDUCED in the coil. iii)By TAKING two conducting coils and insert them over a non- conducting cylindrical roller then on changing current flowing in one coil and induced current is OBTAINED in the other coil. hope this answer helps u

Discussion

7.	Explain why object moving in fluids must have special shape.
Answer» Explain why objects moving in FLUIDS must have special shapes. Answer: When a body moves through a fluid, it experiences an opposing force which tries to oppose its motion through thefluid. ... By GIVING objects a special shape, the force of friction acting on it can be MINIMISED.

Discussion

8.	Define one pascal ?????????
Answer» 1 PASCAL is defined as UNIT force exerted PER unit area 1 Pascal =1 newton / 1 m*m

Discussion

9.	What is the speed of sound in Dry air and Moist air??
Answer» The SPEED of SOUND in dry AIR is 340mpersec.. and the speed of sound in MOIST air is 346m PER sec.

Discussion

10.	A metallic wire coil is stationary in a non uniform magnetic field. What is the emf. Induced in the coil?
Answer»

Discussion

11.	Why is it not possible to isolate the poles if a magnet?
Answer» Because poles don’t exist. To illustrate it imagine current going through a LOOP of wire. Tt creates a magnetic field around the wire with north and SOUTH poles but these poles are VIRTUAL, merely indicating on which side the filed LINES COME out and which side they go in.

Discussion

12.	What is meant by "perigee" ?
Answer» Here is your ANSWER, PERIGEE MEANS the point in outer space where an object TRAVELING around the EARTH. HOPE IT HELPS YOU !!!

Discussion

13.	Totally how many sub atomic particles are present in atom
Answer» There are three SUBATOMIC particles PRESENT in an atom, PROTON, electrons and NEUTRONS. HOPE IT HELPS YOU !!!!

Discussion

14.	Name the device used to measure Refractive Index of a material
Answer» The device used to measure REFRACTIVE index of a MATERIAL is REFRACTOMETERS.

Discussion

15.	Which of the electromagnetic waves has shorter wave length than those of visible light?
Answer» Heya DEAR!! $<klux>LIGHT</klux> waves with shorter wavelengths(and higher frequencies)$ $also have more energy, so types of light like gamma rays, X-rays, and ultraviolet light are more <klux>ENERGETIC</klux>$ than visible light, and INFRARED, MICROWAVES, and radio waves are less energetic $than the light in the visible spectrum.$ ☆ $Thank Q hope this answer helped u !! plzz pick my answer as the best if u feel this answer helpful$

Discussion

16.	Which one of the two an ammeter or milliammeter has a higher resistance and why?
Answer» HEYA DEAR!! $milliampere have greater resistance. For a constant voltage , the current through a milliammeter must be lower$ (in.. the.. order_ of.. MILLIAMPERES) $but the current through an ammeterwould be higher (in the <klux>ORDER</klux> of amperes) thus the resistance in milliammeter will be higher.$ . ☆ $Thank Q hope this answer helped u !! plzz pick my answer as the best if u feel this answer helpful$

Discussion

17.	Which of the two circuits has the greater oscillation frequency
Answer» $We have also seen in our tutorial about series RLC circuits that two or more sinusoidal meaning that .$ it is a ratio of RESONANT frequency to BANDWIDTH and the higher the CIRCUIT Q,

Discussion

18.	What type of energy is derived from heated groundwater....Ans?
Answer» POTENTIAL ENERGY ....... i THINK

Discussion

19.	Tr is trajectory of the particle under the central force.At a position p, the force isdirected along op. O is the center of the force taken as the origin . In time delta t the particle moves from p to p;
Answer» Hii DEAR!! ●At a position p, the force isdirected along op. O is Get the along op. O is the center of the force TAKEN as the origin . $In time delta t the particle moves from p to p;.$ HOPE it HELPS you

Discussion

20.	What is the effect of temperature on conductivity of semiconductor?
Answer» HII DEAR !! $increase in temperature, number of carriers in the semiconductor <klux>MATERIAL</klux> increases and which leads to increase in conductivityof the material.$ So we CALL the semi-conductor material have negativetemperature COEFFICIENT i.e. $with increase in temperature, resistance decreases.$ $Thank Q hope this answer helped u !! plzz pick my answer as the best if u feel this answer helpful$

Discussion

21.	How many elements are possible for 1 st periodic table if azimuthal quantum number can have integral values from 0,1,2 (n i)
Answer» Given: Azimuthal quantum number have integral values from 0,1,2 (n + 1) To find: How many elements are possible for 1 st periodic table ? Solution: Now we have given that Azimuthal quantum number can have VALUE of x from: 0 to ( n + 1 ) So : for n = 1, l = 0, 1, 2 for n = 2, l = 0, 1, 2, 3 Now we have (n+l) rule, so APPLYING it , we get the sub shell The order being 1s, 1p , 2s, ... Total Number of such element possible will be: 2 x ( capacity of 1s SUBSHELL ) + 6 x ( capacity of 1p subshell ) = 8 elements ANSWER: So 8 elements are possible for 1 st periodic table.

21.

How many elements are possible for 1 st periodic table if azimuthal quantum number can have integral values from 0,1,2 (n i)

Answer»

Given: Azimuthal quantum number have integral values from 0,1,2 (n + 1)

To find: How many elements are possible for 1 st periodic table ?

Solution:

Now we have given that Azimuthal quantum number can have VALUE of x from:

0 to ( n + 1 )

So :

for n = 1, l = 0, 1, 2

for n = 2, l = 0, 1, 2, 3

Now we have (n+l) rule, so APPLYING it , we get the sub shell

The order being

1s, 1p , 2s, ...

Total Number of such element possible will be:

2 x ( capacity of 1s SUBSHELL ) + 6 x ( capacity of 1p subshell )

= 8 elements

ANSWER:

So 8 elements are possible for 1 st periodic table.

Discussion

22.	A solid body of constant density is obtained by revolving the cardiod r = a(1 + cos theta ) about the initial line. Find its m.I. About a straight line through the pole and perpendicular to the initial line.
Answer» So to now FIND the points at which it is parallel to the initial line, I assumed that the SQUARE root of y2y2 should be taken before it is DIFFERENTIATED and equated to 00. the cardiod r = a(1 + cos theta )

Discussion

23.	a machine exerts average force of 900N to push a body through a distance of 10m in 30s. calculate the work done and the power of the machine
Answer» W=F x S W=900 x 10m so work DONE is 9000 joules power= work/time 9000 / 30 power is 300 WATT

Discussion

24.	if the mass of a planet is 8 times the mass of the earth and its radius is twice the radius of the earth what will be the escape velocity for the planet
Answer» The ESCAPE VELOCITY will be.697800 MSQUARE

Discussion

25.	two identical spheres of radii 10cm each are placed in between two rigid walls as shown the spacing between the walls is 36cm the find the force of contact between the spheres if the weight of each sphere is W
Answer» # CORRECT question should be- TWO identical uniform frictionless spheres, each of weight W, rest as shown in Fig. at the bottom of a FIXED, rectangular container. The line of CENTERS of the spheres MAKES an angle 0 with the horizontal. # Answer- 5/3 W # Explanation- The sphere at the top is in vertical equilibrium, therefore N.sinϴ = W N = W/sinϴ You can calculate sinϴ from figure. sinϴ=3/5 Contact forces between two spheres will be 5/3 W

Discussion

26.	What kind of lenses form an inverted and magnified image of the object
Answer» CONVEX MIRROR GIVE the MAGNIFIED IMAGE

Discussion

27.	A ballet dancer is rotatig at angular velocity w on smooth horizontal floor his body close to his axis of rotation by which his radius of gyration decreases by 1/4 of his initial radius of gyrationhis final angular velocity is
Answer» PLEASE SEE ATTACHEMENT

Discussion

28.	If a person moves from Chennai to Madurai his weight decreases or increases
Answer» A moving object will gain the mass. In special relativity physics, mass of an object depends on the velocity of the object: m' = m/sqrt(1-v^2/c^2); where m' is the mass of the object, m is rest mass (mass of same object when at rest), v is SPEED of object, c is speed of light. (Note that an object with any rest mass moving at light's speed will have infinite mass. That is the reason all the particles which move at light's speed are mass-less particles like photons, bosons, ETC.) Weight is the result of external force and is independent of speed of the object. If gravitational field is varied for an object with CONSTANT speed, EVEN in that case the weight will change. If gravitational field is constant but object is gaining speed, weight will also change (due to change in mass). PLEASE MARK MY ANSWER AS A BRAINLIEST ANSWER.

Discussion

29.	An old person is unable to see nearby object as well as distance objects what defect of vision is he suffering from
Answer» PRESBYOPIA HOPE it HELPS you

Discussion

30.	What is reduction reactionwhat is reduction reaction
Answer» When there is addition of HYDROGEN and loss of OXYGEN, it is said to be reduced. Example: ZnO + C = Zn +CO Here Zinc lost the oxygen atom therefore copper is reduced. I HOPE IT HELPS YOU! FOLLOW ME FOR ANY HELP!

Discussion

31.	You are given an iron strip. How wIll you convert it into a magnet?
Answer» By giving him electric energy. Surround wires around the iron strip. And on the switch to GENERATE electric current. Keep it some time. If this is useful to you so COMMENT me and not , so I am REALLY sorry. Thank You!

Discussion

32.	make a diagram to show how hypermetropia is corrected. the near point of a hypermetropic eye is 1 m.what is the power of the lens required to correct this defect .assume that the near point of the normal eye is 25 CM
Answer» ⭐⭐hey mate! To FIND the FOCAL LENGTH apply the formula F = (N.P)(D) / N.P -D Where , N.P = near point D = least distance 1/F = 1/v -1/u 1/F = 1/-100 - 2/-25 F =100/3 Power = 3/100 × 100 = 3D #phoenix

32.

make a diagram to show how hypermetropia is corrected. the near point of a hypermetropic eye is 1 m.what is the power of the lens required to correct this defect .assume that the near point of the normal eye is 25 CM

Answer»

⭐⭐hey mate!

To FIND the FOCAL LENGTH apply the formula

F = (N.P)(D) / N.P -D

Where ,

N.P = near point

D = least distance

1/F = 1/v -1/u

1/F = 1/-100 - 2/-25

F =100/3

Power = 3/100 × 100 = 3D

#phoenix

Discussion

33.	What is the blind spot of the eye?
Answer» The POINT on the retina where the OPTIC NERVE leaves the EYE is CALLED blindspot.

Discussion

34.	In the adjoining fig the two parallel wires pq and st are at 30cm apart. The currents flowing in the wires are according to fig. The force acting over a length of 5m of the
Answer» HEY , where is the FIGURE ?.

Discussion

35.	The maximum kinetic energy of a photoelectron is 3 electron volt what is its stopping potential
Answer» SINCE K.E max= eVo ......(1) And given, K.E max = 3eV.....(2) From (1) & (2) 3eV = eVo Vo = 3V Hence the stopping POTENTIAL Vo is 3V

35.

The maximum kinetic energy of a photoelectron is 3 electron volt what is its stopping potential

Answer»

SINCE K.E max= eVo ......(1)

And given,

K.E max = 3eV.....(2)

From (1) & (2)

3eV = eVo

Vo = 3V

Hence the stopping POTENTIAL Vo is 3V

Discussion

36.	Difference between periodic motion and uniform motion
Answer» One of the hardest things about composing tests is to make sure the questions are not ambiguous. For this question to be un-ambiguous, the teacher must have provided a definitive and complete definition of the characteristics each of the potential answers and expect the STUDENT to understand and apply them. As it is presented to US, the question is ambiguous to the extent that any answer except perpetual motion could be correct. It could be periodic in the sense that the hand returns to a given POSITION REPEATEDLY at EQUAL time intervals; it could be variable in that the acceleration experienced by any point on the hand changes constantly and it could be uniform in that the speed of any point on the hand stays the same at all times (as opposed to its velocity which changes constantly).

Discussion

37.	an earth satellite moves in a circular orbit with a speed of 6.2km/s. find the time of one revolution and its centripetal acceleration.
Answer» An EARTH satellite MOVES in a CIRCULAR orbit with an orbital speed of 6200 . FIND the time of one revolution of the satellite. in seconds Find the radial acceleration of the satellite in its orbit. in M/s2

Discussion

38.	The torque of a force F= -3i+j+5k acting at point 7i+3j+k is?
Answer» Hola User_________________ Here is Your ANSWER...!! __________________________ ⭐Actually welcome to the concept of Rotational dynamics... ⭐Basically we know that Torque is GIVEN as .. ⭐Tau = F × r ⭐so we GET as

Discussion

39.	white light is made to fall on one face of a glass prism. draw a ray diagram to show the nature of the emergent beam.
Answer» ‘Dispersion of Light’ is the splitting of white light when it passes through a glass prism into its constituent spectrum of colors (i.e. VIOLET, indigo, blue, green, YELLOW, orange and red). Dispersion literally means ‘DISTRIBUTION’ and that is what we can see in the picture below. At VARIOUS frequencies and various angles the white light splits into its constituent colors.

Discussion

40.	Can anyone send me p.s model paper of AP
Answer» Hamare PAS to NAHI yei AAP apps DOWNLOAD kariyai

Discussion

41.	What do you mean by zero error in the spring balance ???
Answer» The zero error in a SPRING balance can be found by suspending it freely. Hold the spring balance in your hand and do not PLACE any weights on it. Note, where the POINTER points. If it is zero, then there is no zero error. If the pointer is slightly down (say 1) then zero error is -1. So, whatever weight you measure, subtract 1 from it to get the exact result. Now, the range of the spring balance is the MAXIMUM weight that it can measure. So, if the spring balance has maximum reading as 100, then the range of the spring balance is 0-100 kg. The least count is found by dividing the range of the scale with the total number of divisions on the scale. If the total number of divisions on the scale is 100, then the least count is 100/100 = 1 kg. So, the least weight difference that a spring balance can measure is 1 kg.

41.

What do you mean by zero error in the spring balance ???

Answer»

The zero error in a SPRING balance can be found by suspending it freely.

Hold the spring balance in your hand and do not PLACE any weights on it.

Note, where the POINTER points.

If it is zero, then there is no zero error.

If the pointer is slightly down (say 1) then zero error is -1. So, whatever weight you measure, subtract 1 from it to get the exact result.

Now, the range of the spring balance is the MAXIMUM weight that it can measure. So, if the spring balance has maximum reading as 100, then the range of the spring balance is 0-100 kg.

The least count is found by dividing the range of the scale with the total number of divisions on the scale.

If the total number of divisions on the scale is 100, then the least count is 100/100 = 1 kg.

So, the least weight difference that a spring balance can measure is 1 kg.

Discussion

42.	a man whose mass is 50 kg climbs up 30 steps of the stairs in 30 seconds if each step is 20cm high calculate the power used in climbing the stairs.
Answer» Mass, m = 50Kg height, h = 30 × 20 = 600cm = 6m acceleration due to GRAVITY, g = 9.8m/s² time TAKEN, t = 30s power used = ? work DONE, W = m×g×h = 50 × 9.8 × 6 = 2940J. Power = Work Done/Time taken = 2940/30 Power = 98Watt

Discussion

43.	the temperature at which the reading on the Kelvin scale will be double of that on the fahrenheit scale and the centigrade scale are what is the answer for this question
Answer» I too have the same QUESTION FRIEND

Discussion

44.	A body of mass 1kg is projected vertically up with K. E equal to 196J .the height at which it's total K. E is converted to Its P. E is(g=9.8)
Answer» Given mass = 1 kg K.E. = 196 J We know K.E. = P.E. So, P.E. = 196 J g = 9.8 ms^-2 P.E. = MGH = 1 × 9.8 × H = 9.8h J or, 9.8h = 196 or, h = 196/9.8 m or, h = 20m. So, K.E. will convert to P.E. at a height of 20m. Please MARK my answer as BRAINLIEST answer. Please.... Thank You.

44.

A body of mass 1kg is projected vertically up with K. E equal to 196J .the height at which it's total K. E is converted to Its P. E is(g=9.8)

Answer»

Given mass = 1 kg

K.E. = 196 J

We know K.E. = P.E.

So, P.E. = 196 J

g = 9.8 ms^-2

P.E. = MGH

= 1 × 9.8 × H

= 9.8h J

or, 9.8h = 196

or, h = 196/9.8 m

or, h = 20m.

So, K.E. will convert to P.E. at a height of 20m.

Please MARK my answer as BRAINLIEST answer.

Please....

Thank You.

Discussion

45.	What is the Planck's temperature??
Answer» Heya!! mate^_^ your answer is - - - $Planck'sTemperature$ it is unit of TEMPERATURE in the SYSTEM of natural units known as planck unit.it serve as the defining unit of planck temperature scale.. hope it helps ^_^ be brainly

Discussion

46.	How do we produce sound
Answer» MOUTH !!$$&%#$%&&$%&

Discussion

47.	What are closed and open circuits?
Answer» CLOSED circuit the current will FOLLOW as the key PLUG in and the BULB will glow. open circuit the current will not flow and the bulb will ñot glow . vise VERSA to closed circuit...

Discussion

48.	State the purpose of kwh metre
Answer» It is used to CHECK the POWER CONSUMED by your house,BUILDING or department

Discussion

49.	What is retardation?
Answer» Hey. Restardation:-Retardation is the act or result of delaying; the EXTENT to which ANYTHING is retarded or delayed; that which RETARDS or delays. Hope this helps you dear. PLEASE mark it as brainliest.

Discussion

50.	What is working of periscope
Answer» ❗️❗️heyya❗️❗️ ⚫️ 〰️⚫️〰️⚫️〰️⚫️ here is ur answer(｡ŏ﹏ŏ) A periscope works on the LAWS of Reflection which states that the light from the object falls on ONE MIRROR at a 45oangle from the object and is reflected. This reflected light then falls on another mirror and is again reflected until it reaches the human eye. (๑´•.̫ • `๑) HOPE it helps..☺️ #gunnu⭐️

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Define potential energy and give an example

Relative velocity of two moving objects in opposite direction

Give the behaviour of wire under increasing the load or stress strain curveusing the above graph

Write balanced equations for the reaction of Sodium Potassium and calcium in cold water

a particle of mass m moving with speed v towards east strike another particle of same mass moving with same speed towards north .after striking 2 particles fuse together .with what speed this new particle of mass 2 m will move in North East direction .

Describe three different ways to produce in the induced current in a coil of wire

Explain why object moving in fluids must have special shape.

Define one pascal ?????????

What is the speed of sound in Dry air and Moist air??

A metallic wire coil is stationary in a non uniform magnetic field. What is the emf. Induced in the coil?

Why is it not possible to isolate the poles if a magnet?

What is meant by "perigee" ?

Totally how many sub atomic particles are present in atom

Name the device used to measure Refractive Index of a material

Which of the electromagnetic waves has shorter wave length than those of visible light?

Which one of the two an ammeter or milliammeter has a higher resistance and why?

Which of the two circuits has the greater oscillation frequency

What type of energy is derived from heated groundwater....Ans?

Tr is trajectory of the particle under the central force.At a position p, the force isdirected along op. O is the center of the force taken as the origin . In time delta t the particle moves from p to p;

What is the effect of temperature on conductivity of semiconductor?

How many elements are possible for 1 st periodic table if azimuthal quantum number can have integral values from 0,1,2 (n i)

A solid body of constant density is obtained by revolving the cardiod r = a(1 + cos theta ) about the initial line. Find its m.I. About a straight line through the pole and perpendicular to the initial line.

a machine exerts average force of 900N to push a body through a distance of 10m in 30s. calculate the work done and the power of the machine

if the mass of a planet is 8 times the mass of the earth and its radius is twice the radius of the earth what will be the escape velocity for the planet

two identical spheres of radii 10cm each are placed in between two rigid walls as shown the spacing between the walls is 36cm the find the force of contact between the spheres if the weight of each sphere is W

What kind of lenses form an inverted and magnified image of the object

A ballet dancer is rotatig at angular velocity w on smooth horizontal floor his body close to his axis of rotation by which his radius of gyration decreases by 1/4 of his initial radius of gyrationhis final angular velocity is

If a person moves from Chennai to Madurai his weight decreases or increases

An old person is unable to see nearby object as well as distance objects what defect of vision is he suffering from

What is reduction reactionwhat is reduction reaction

You are given an iron strip. How wIll you convert it into a magnet?

make a diagram to show how hypermetropia is corrected. the near point of a hypermetropic eye is 1 m.what is the power of the lens required to correct this defect .assume that the near point of the normal eye is 25 CM

What is the blind spot of the eye?

In the adjoining fig the two parallel wires pq and st are at 30cm apart. The currents flowing in the wires are according to fig. The force acting over a length of 5m of the

The maximum kinetic energy of a photoelectron is 3 electron volt what is its stopping potential

Difference between periodic motion and uniform motion

an earth satellite moves in a circular orbit with a speed of 6.2km/s. find the time of one revolution and its centripetal acceleration.

The torque of a force F= -3i+j+5k acting at point 7i+3j+k is?

white light is made to fall on one face of a glass prism. draw a ray diagram to show the nature of the emergent beam.

Can anyone send me p.s model paper of AP

What do you mean by zero error in the spring balance ???

a man whose mass is 50 kg climbs up 30 steps of the stairs in 30 seconds if each step is 20cm high calculate the power used in climbing the stairs.

the temperature at which the reading on the Kelvin scale will be double of that on the fahrenheit scale and the centigrade scale are what is the answer for this question

A body of mass 1kg is projected vertically up with K. E equal to 196J .the height at which it's total K. E is converted to Its P. E is(g=9.8)

What is the Planck's temperature??

How do we produce sound

What are closed and open circuits?

State the purpose of kwh metre

What is retardation?

What is working of periscope