67486 + Interview Questions in Secondary School in Physics

1.	Shate the effect of current
Answer» Hi!!! ☀The effects of current are - 1) Heating effect: When an electric current PASSES THROUCH a conductor, it produces heat energy in the conductor as a result of which the conductor brcomes hot/warm. 2) MAGNETIC effect: When an electric current passes through a conductor, it creates magnetic fields arount the conductor which can be comprehended by using magnetic lines of force or magnetic field lines. 3) Chemical effect: The passage of an electric current through a conducting liquid CAUSES chemical reactions. This is called chemical effect of currents. I HOPE IT MAY HELP!

Discussion

2.	Hlw mates☺☺✋✋✋✋✋✋✋♪♪♪♪♪♪♪♪Define ⭐✨Màgñîfîçàtíøñ✨⭐°°°°°°°′′′′′′′′′′′′′′′′′′′′′′′′′′′°°°°°°✋✋✋✋✋✋✋✋===================✌✌✌✌✌✌✌✌✌✌✌✌✌✌✌◾▪◾◼⬛◼◾▪◾◼⬛◼◾▪◾◼⬛◼◾▪◾
Answer» _______✨ HEY MATE ✨_______ =========== Answer :- =========== Generally , MAGNIFICATION is the increase (or decrease) in size of an image PRODUCED by an optical system COMPARED to the TRUE size. ✌️ I THINK IT HELPED YOU ✌️

Discussion

3.	which magnet will you use among permanent magnet and Electromagnet for industrial purpose? justify your answer?
Answer» ELECTROMAGNET because it can LIFT HEAVY OBJECT

Discussion

4.	a body is drop from the height of 122.5 m find the time taken by the body to reach the ground and the velocity of which it will hit the ground
Answer» HAPPY VALLEY and UNDERSTAND

Discussion

5.	Why we are not able to see the printed letter near the eyes
Answer» Because EYES do not have ENOUGH FOCUS LENGTH

Discussion

6.	a bullet fired into a fixed target loses half of its velocity in penetrating 15 cm how much further it will penetrate before coming to rest?
Answer» Here I am using 3 cm instead of 15 cm so that you can understand the method and try it yourself Let the initial velocity be v and constant retardation be a. Then (v/2)2= v2- 2A(3) or, 6a = 3v2/4 or, a = v2/8. Now, we the value of a in terms of initial velocity. Let the bullet covers a total distance of x . Then using the same acceleration we get: 02= v2- 2ax. v2= (2v2/8).(x) v2= (v2/4).(x) x = 4cm. So, the bullet covers a total a 4 CMS into the target or the bullet goes furthur by 1 cm.

Discussion

7.	A body of 1 kilograms is how to fall freely from a height of 25 m calculate its kinetic energy potential energy and Total energy at the instance it is at a height of 4 m from the Earth when gequal to 10 M per second square
Answer» GIVEN, u=40 m/s For maximum height,v=0 m/s Using relation, v2−u2=2gh0−402=2×(−10)×hh=80 cm1−Kinetic energy is equal to POTENTIAL energy at h'=h/2=80/2=40 cm2−Potential energy of body of mass 10kg is given byP.E=mgh=10×10×80=8000 J

Discussion

8.	Draw the electron dot structure of chlorine molecule
Answer» That's ELECTRON STRUCTURE of CHLORINE MOLECULE

Discussion

9.	How will you justify that friction is a necessary evil
Answer» FRICTION is the force that works against any action. say a BALL is moving on the ground, it is friction that work against the direction of the ball which helps it to roll farther. so it is a EVIL that work against our actions but its NECESSARY in order to complete them or Without friction we cannot set out the bodies in motion or stop the moving bodies. Thus friction is absolutely necessary for carrying day to day activities. On the other hand, it also wastes the time and ENERGY, brings about wear and tear and slows down the motion. Thus, we can say that friction is a necessary evil.

Discussion

10.	Which book is best for physics for 9 grade student dreaming fit qualifying Neet
Answer» If u WANT to qualify in NEET u NEED to buy NCRT if bio which is 1st step after that buy cingage which is vvvvvvvvvimp for neet I HOPE it will help you

Discussion

11.	The ratio of maximum radiation intensity to the average radiation intensity for antenna is referred to as:
Answer» INTENSITY of RADIATION

Discussion

12.	An electric fan rotates 100 times in one second. If the length of its wing from its axis of rotation is 0.5m. Then what would be the speed of the fan
Answer» Answer: 100pi Explanation: FREQUENCY = 100 times in one second f=1/t *speed(V)=2piradius 100=v/2pi(0.5)* SOEED (v) = 100pi m/s

12.

An electric fan rotates 100 times in one second. If the length of its wing from its axis of rotation is 0.5m. Then what would be the speed of the fan

Answer»

Answer:

100pi

Explanation:

FREQUENCY = 100 times in one second

f=1/t

speed(V)=2pi*radius

100=v/2pi*(0.5)

SOEED (v) = 100pi m/s

Discussion

13.	Why does flickering of light occur
Answer» Light flicker refers to rapid or quick and, repeated CHANGES in the BRIGHTNESS of light over time - light that appears to FLUTTER and be UNSTEADY. It is caused when the voltage supplied to a light source changes or when the power line voltage itself fluctuates.

Discussion

14.	How does flikering of light occurs
Answer» Light flicker refers to RAPID or quick and, repeated changes in the BRIGHTNESS of light over time - light that appears to flutter and be unsteady. It is caused when the voltage SUPPLIED to a light source changes or when the power line voltage itself FLUCTUATES.

Discussion

15.	In a head on elastic collision of a very heavy body moving at v with a light body at rest v of the heavy body after collision is approximately
Answer» When a heavy PARTICLE collides head-on and elastically with a MUCH lighter particle at REST, the velocity of the heavy particle REMAINS practically unchanged but the lighter particle moves with double the velocity of the heavier particle

Discussion

16.	Two blocks of masses m1 = 1 kg and m2 = 2 kg are connected by non-deformed light spring. They are lying on a rough horizontal surface. The coefficient of friction between the blocks and the surface is 0.4. What minimum constant force f has to be applied in horizontal direction to the block of mass m1 in order to shift the other block? (take g = 10 m/s2)
Answer» My APPROACH was to set the force on m2 = 0, so the spring force equals the friction force. Then I set the force on M1 = 0, so the force equals the spring force plus the friction force on m1. This gives the answer as F=k(m1+m2)g. However the correct solution is found by SETTING the WORK done by BLOCK 1 = 0, which gives k(m1+(m2)/2)g.

Discussion

17.	A wheel is rotating with average velocity of 3600rpm find angular velocity
Answer» V=rw v is linear VELOCITY and w is angular velocity we NEED radius of wheel to SOLVE...

Discussion

18.	Magnitude of acceleration of planet in orbit around sun is propotional to
Answer» Magnitude of acceleration of PLANET in orbit around SUN is propotional to its MASS

Discussion

19.	A body travels from rest with acceleration 8m/s^2.find its velocity when it has covered a distance of 100m
Answer» U = 0 A = 8 V =? S = 100 V = u + at $v {}^{2} = u {}^{2} + 2as$ $v {}^{2} = (0) {}^{2} + 2(8)(100)$ $v {}^{2} = 1600$ $v \: = 40$ $hence \: velocity \: would \: be \: 40mps$ Thanks

Discussion

20.	The ratio of circumferetial stress to the longitudinal stress in the walls of a cylindrical shell due to flowing liquid is
Answer» Hsvsigssijgveijavvspkbh

Discussion

21.	What is conclusion of transformation of energy
Answer» That it states that energy CHANGES it form to ANOTHER form energy is never created or DESTROYED

Discussion

22.	Disadvantage of a convex mirror when used as a car driving mirror
Answer» HELLO MATE This can CAUSE the viewer to ASSUME the car behind him might be FARTHER than it actually is. This is adisadvantage of using a convex mirror and it is due to the same reason that it is written on rear VIEW mirrors that - objects in the mirror are closer than they appear

Discussion

23.	Please solve it fastly
Answer» CURRENT will be 2 OHM

Discussion

24.	two balls of masses m and 2m moving in opposite direction collides head on elastically with velocity v and 2v . find their velocities after collision
Answer» Mass of 1st ball , $m_1$ = m mass of 2nd ball, $m_2$ = 2m initial velocity of 1st ball , $u_1$ = -v initial velocity of 2nd ball, $u_2$ = 2v use law of CONSERVATION of linear momentum, $m_1u_1+m_2u_2=m_1v_1+m_2v_2$ $-mv+4mv=m(v_1+2v_2)$ $3v=v_1+2v_2$ ......(1) use law of conservation of ENERGY, $\frac{1}{<klux>2</klux>}m_1u_1^2+\frac{1}{2}m_2u_2^2=\frac{1}{2}m_1v_1^2+\frac{1}{2}m_2v_2^2$ $mv^2+(2m)(2v)^2=m(v_1^2+2v_2^2)$ $9v^2=v_1^2+2v_2^2$ .....(2), from equations (1) and (2), $v_1=-v$ and $v_2=2v$

Discussion

25.	From which organ sysem is made?
Answer» Group of cells MAKE a TISSUE. Group of tissue MAKES an ORGAN. Group of organ makes organ SYSTEM.

Discussion

26.	How Wii you make pure water a good conductor of electricity?
Answer» ADD a very small amount of dilute sulphuric ACID (H2SO4)

26.

How Wii you make pure water a good conductor of electricity?

Answer»

ADD a very small amount of dilute sulphuric ACID

(H2SO4)

Discussion

27.	Scientists who is responsible for nuclear reactor in india
Answer» Hey MATE! your ANSWER is. .. HOMI JAHANGIR BHABHA

Discussion

28.	Speed of a car is 25 m per second how long will it take to cover the distance of 90 km
Answer» $v = s \div t$ 25=90/t t=90/25 t=3.6 SECOND

Discussion

29.	What physical quantity is measured in decibels
Answer» Amplitude means loudness which is also measured in db decibels EXAMPLE --) SOUND of 80 db is very high which comes from factories and INDUSTRIES.

Discussion

30.	What are the major weaknesses of our country.
Answer» WEAKNESS OF OUR COUNTRY IS ● LONG GESTATION PERIOD IT TAKES FROM POLICY TO IMPLEMENTATION LEVELS AND THAT CAUSE COST ESCALATION AND ONCE EXECUTED MIGHT NOT GIVE THE RESULT AS IT WAS ANTICIPATED. ● 'CHALTA HAI ' ATTITUDE OF PEOPLE WHO SHOULD TAKE THE INITIATIVE IN THE BEUROCRATIC LEVEL AND POLITICAL LEVEL... ● STILL THERE ARE PEOPLE WHO ARE READY TO GIVE A MILLION WORTH IF BENEFIT TO A PRIVATE PARTY FOR ONE OR FEW THOUSANDS.. ● THERE ARE PEOPLE WHO DON'T HAVE MONEY FOR BEGGARS FOR THEM WHO DIDN'T EAT FOODS FOR LAST FEW WEEKS BUT THEY HAD MONEY FOR GIRLFRIEND BOYFRIEND OR GOING IN 5 STAR HOTEL. .. HOPE IT HELPS U MARK AS BRAINLIEST

Discussion

31.	From a rifle of mass 4kg ,a bullet of mass 50gram is fired with an initial velocity of 35 m/s .Calculate the initial recoil velocity of the rifle .
Answer» SINCE, no external force acts on the RIFLE, the change in MOMENTUM will be zero so, momentum of rifle = momentum of bullet 4 x V = 0.050 x 35 V = 0.44 m/s HOPE THIS HELPS YOU ;-)

Discussion

32.	Please ans my question.
Answer» ANSWER is B $kinetic \: <klux>ENERGY</klux> = 0.5 \times m \times {v}^{2}$ KE= 0.50.42100^2=2100 THERMAL ENERGY = 2100/4.2=500

Discussion

33.	Hot water gets cooled faster ........1 inside the house in winter 2 in the open in winter 3 in the open in summer 4 inside the house in summer
Answer» 2 in the OPEN WINTER

Discussion

34.	The frequency of a source of sound is 250 Hz . How many times does it vibrate in a minute?
Answer» It VIBRATES 15000 TIMES in 1 MINUTE

Discussion

35.	Reflection obtained from a smooth surface is called a select one:a. Both a and bb. Regular reflectionc. Noned. Irregular reflection
Answer» REGULAR REFLECTION. B

Discussion

36.	What is electric dipole moment and write its si unit in hindi answer?
Answer» विद्युत द्विध्रुव वह निकाय है जिसमें दो परिमाण में बराबर परन्तु विपरीत प्रकार (FIRST is POSITIVE and SECOND is NEGATIVE या first is Negative and second is positive ) के बिंदु आवेश एक दुसरे से अल्प दूरी पर स्थित होते है\| si unit- Coulomb metre (CM)

Discussion

37.	A) what term can we use to describe this state of stress? B). What is the mean normal stress ? C). What is the maximum shear stress ?
Answer» A normal STRESS is a stress that OCCURS when a member is loaded by an axial force. The value of the normal force for any prismatic section is simply the force divided by the cross sectional AREA. A normal stress will occur when a member is placed in tension or compression. The maximum shear stress is themaximum concentrated shear force in a small area. It is very CRITICAL for a structural engineer to locate and evaluate the maximum shear stress in a member in order to design the member in such a way to resist it.

Discussion

38.	The rate at which fluid flows through a closed pipe can be determined by
Answer» SINCE VOLUME of FLUID = Area of CROSSECTION of the pipe * SPEED * time U can derive for speed Speed = volume /(speed * time ) Hope this helps

Discussion

39.	Derive angle of friction.
Answer» The coefficient of FRICTION between any two surfaces in contact is DEFINED as the RATIO of the force of limiting friction and normal reaction between them. u= F / R Angle with the resultant of force of limiting friction F and normal reaction R makes with the DIRECTION of normal reaction R is angle of reaction.

39.

Derive angle of friction.

Answer»

The coefficient of FRICTION between any two surfaces in contact is DEFINED as the RATIO of the force of limiting friction and normal reaction between them.

u= F / R

Angle with the resultant of force of limiting friction F and normal reaction R makes with the DIRECTION of normal reaction R is angle of reaction.

Discussion

40.	If you create a vehicle which can travel faster than the speed of light. Can we time travel by using the vehicle what is the color of the sun.
Answer» Yes , something like that some studies say that if you spin AROUND the solar system at the speed of light or more than that and than you will return to earth than you will be just 5 YEARS old than you were but your friends of your age would be 65 years at that TIME ..HOPE it helped you MATE mark me brainiest

Discussion

41.	What isa. Heightb.The lowest total resistance that can be secured by combination?
Answer» The LOWEST TOTAL RESISTANCE that can be SECURED by COMBINATION

Discussion

42.	What is the very hard metal ?
Answer» Titanium vibranium in MARVEL

Discussion

43.	42H z and 84Hz answer 21hz
Answer» 84-42=42÷2= 21hz.answer

Discussion

44.	Is the mechanical advantage more if the fulcrum is near the effort or the load?
Answer» The EFFORT is only less than the load if the load is closer to the fulcrum. The lever then ACTS as a force magnifier and the mechanical ADVANTAGE is greater than ONE. If the effort is closer to the fulcrum, then the effort is larger than the load and the mechanical advantage is less than one.

Discussion

45.	If two waves are in phase and have same amplitude then resultant wave has
Answer» 8yru4chdjndhfhfjdjfhfhdkedhfhfhfufj

45.

If two waves are in phase and have same amplitude then resultant wave has

Answer»

8yru4chdjndhfhfjdjfhfhdkedhfhfhfufj

Discussion

46.	A particle has a velocity 5t i + 20-8t2 the locus of the motion of the particle is
Answer» ..........................

Discussion

47.	If the weight of the girl is66N in the earth surface what will be the weight on the Moon surface
Answer» The WEIGHT on an OBJECT on moon is 1/6 TIMES the weight of it on EARTH so the ANSWER is 11 N plz give me tnks

Discussion

48.	An object 3cm hight is placed at it distance of 10cm in fornt of convcaving mirror of focal length 20 cm .Find the position natural and size of the image format
Answer» O=3cm u=(-10)cm Since, it is a concave mirror. Therefore, f=(-20)cm $\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\ \frac{ - 1}{20} = \frac{1}{v} + \frac{ - 1}{10} \\ after \: solving \: this \: \\ v = 20cm.$ I/O = v/u I/(-10)=20/(-10) I=20cm. Nature:- VIRTUAL and erect. Hope this will help you. If you like my answer Please mark it as BRAINLIEST And Be my FOLLOWER if possible.

Discussion

49.	It is difficult to burn a heap of green leaves but not a heap of dry leaves . explain why???
Answer» hii Green leaves CONTAIN moisture and as a result, the ignition temperature of green leaves is MUCH higher than that of dry leaves. Due to this, it is difficult to burn a heap of green leaves but dry leaves CATCH FIRE easily. thanku..

49.

It is difficult to burn a heap of green leaves but not a heap of dry leaves . explain why???

Answer»

hii

Green leaves CONTAIN moisture and as a result, the ignition temperature of green leaves is MUCH higher than that of dry leaves. Due to this, it is difficult to burn a heap of green leaves but dry leaves CATCH FIRE easily.

thanku..

Discussion

50.	A sphere of mass m and radius r is moved over a slab having vertical dimension r/3 by applying force F at the sphere's periphery. Then what will be the minimum force required?
Answer» I don't KNOW it is only because I have not taught. Btw in which CLASS R U

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Shate the effect of current

which magnet will you use among permanent magnet and Electromagnet for industrial purpose? justify your answer?

a body is drop from the height of 122.5 m find the time taken by the body to reach the ground and the velocity of which it will hit the ground

Why we are not able to see the printed letter near the eyes

a bullet fired into a fixed target loses half of its velocity in penetrating 15 cm how much further it will penetrate before coming to rest?

A body of 1 kilograms is how to fall freely from a height of 25 m calculate its kinetic energy potential energy and Total energy at the instance it is at a height of 4 m from the Earth when gequal to 10 M per second square

Draw the electron dot structure of chlorine molecule

How will you justify that friction is a necessary evil

Which book is best for physics for 9 grade student dreaming fit qualifying Neet

The ratio of maximum radiation intensity to the average radiation intensity for antenna is referred to as:

An electric fan rotates 100 times in one second. If the length of its wing from its axis of rotation is 0.5m. Then what would be the speed of the fan

Why does flickering of light occur

How does flikering of light occurs

In a head on elastic collision of a very heavy body moving at v with a light body at rest v of the heavy body after collision is approximately

A wheel is rotating with average velocity of 3600rpm find angular velocity

Magnitude of acceleration of planet in orbit around sun is propotional to

A body travels from rest with acceleration 8m/s^2.find its velocity when it has covered a distance of 100m

The ratio of circumferetial stress to the longitudinal stress in the walls of a cylindrical shell due to flowing liquid is

What is conclusion of transformation of energy

Disadvantage of a convex mirror when used as a car driving mirror

Please solve it fastly

two balls of masses m and 2m moving in opposite direction collides head on elastically with velocity v and 2v . find their velocities after collision

From which organ sysem is made?

How Wii you make pure water a good conductor of electricity?

Scientists who is responsible for nuclear reactor in india

Speed of a car is 25 m per second how long will it take to cover the distance of 90 km

What physical quantity is measured in decibels

What are the major weaknesses of our country.

From a rifle of mass 4kg ,a bullet of mass 50gram is fired with an initial velocity of 35 m/s .Calculate the initial recoil velocity of the rifle .

Please ans my question.

Hot water gets cooled faster ........1 inside the house in winter 2 in the open in winter 3 in the open in summer 4 inside the house in summer

The frequency of a source of sound is 250 Hz . How many times does it vibrate in a minute?

Reflection obtained from a smooth surface is called a select one:a. Both a and bb. Regular reflectionc. Noned. Irregular reflection

What is electric dipole moment and write its si unit in hindi answer?

A) what term can we use to describe this state of stress? B). What is the mean normal stress ? C). What is the maximum shear stress ?

The rate at which fluid flows through a closed pipe can be determined by

Derive angle of friction.

If you create a vehicle which can travel faster than the speed of light. Can we time travel by using the vehicle what is the color of the sun.

What isa. Heightb.The lowest total resistance that can be secured by combination?

What is the very hard metal ?

42H z and 84Hz answer 21hz

Is the mechanical advantage more if the fulcrum is near the effort or the load?

If two waves are in phase and have same amplitude then resultant wave has

8yru4chdjndhfhfjdjfhfhdkedhfhfhfufj

A particle has a velocity 5t i + 20-8t2 the locus of the motion of the particle is

If the weight of the girl is66N in the earth surface what will be the weight on the Moon surface

An object 3cm hight is placed at it distance of 10cm in fornt of convcaving mirror of focal length 20 cm .Find the position natural and size of the image format

It is difficult to burn a heap of green leaves but not a heap of dry leaves . explain why???

A sphere of mass m and radius r is moved over a slab having vertical dimension r/3 by applying force F at the sphere's periphery. Then what will be the minimum force required?