67486 + Interview Questions in Secondary School in Physics

1.	Solve these Questions Please1. A force of 15 N is applied over a surface area of 0.6 m2. What is the pressure?2. Why do suit cases and school bags have broad straps?3. If the area of head of a man is 10cm X 10cm. How much weight of air would be carrying on his head?4. A rectangular box has weight 100 N when placed on a floor, the area of contact is found to be 5 m2.Find the pressure exerted on the floor?
Answer» 1) $pressure = \frac{15}{0.6 } \\ = 24.10 \: pascal$ 2) pressure is inversely proportional to area . Hence if there are broad straps in suit cases and school bags the pressure will be less on our solder and we can carry it WITHOUT pain. IF U SATISFIED WITH MY ANSWER PLEASE MAKE ME BRAINLIEST AND FOLLOW ME FOR MORE SUPPORT. SEARCH MY CHANNEL ON YOUTUBE WITH NAME STUDY GEAR . MY CHANNELS PROFILE IS SAME AS MY CURRENT BRAINLY PROFILE. AND SAY IN COMMENT BOX ABOUT MY NEXT VIDEO. THANKS.

Discussion

2.	A force of 12N acts on a mass of 1.5 kg at rest for 3s. Find the final v and the momentum of the body after 3s.
Answer» Force=ma=12N => a=12/1.5 => a=8m/s^2 v=u+at v=0+(8)(3). v=24m/s P=mv P=1.5 x 24 = 36 kg m/sec

Discussion

3.	2 parallel plate air capacitor have there plate areas 100&500cm square . If they have the same charge& the dist. Between the plates of the 1 capacitor 0.5 mm what is the distance between the plate of 2 capacitor
Answer» STEP - by - Step Explanation : since the TWO CAPACITORS have same charge and potential then their capacitance must be EQUAL. By Using above statement we can solve problem BASING this.

3.

2 parallel plate air capacitor have there plate areas 100&500cm square . If they have the same charge& the dist. Between the plates of the 1 capacitor 0.5 mm what is the distance between the plate of 2 capacitor

Answer»

STEP - by - Step Explanation :

since the TWO CAPACITORS have same charge and potential then their capacitance must be EQUAL.

By Using above statement we can solve problem BASING this.

Discussion

4.	A truck starts from rest and rolls down on a hill with a constant acceleration it travel a distance of 400m in 20 sec find its acceleration. Find the force acting on it if it's mass is 7 tonnes(1 tonne=1000kg)
Answer» Here U = 0 s = ut + 1/2 at² = 1/2 at² 400 = 1/2 a * 400 a = 2 m/s² F = ma = 7 * 1000 * 2 = 14000 N

4.

A truck starts from rest and rolls down on a hill with a constant acceleration it travel a distance of 400m in 20 sec find its acceleration. Find the force acting on it if it's mass is 7 tonnes(1 tonne=1000kg)

Answer»

Here U = 0

s = ut + 1/2 at² = 1/2 at²

400 = 1/2 a * 400

a = 2 m/s²

F = ma = 7 * 1000 * 2

= 14000 N

Discussion

5.	Calculate the number of electrons constituting one columb of charge
Answer» CHARGE on an electron (e) = -1.6×10^-19 C And given charge (Q) = 1 C Now, by the formula of Quantization Of Charge => q = ne n = q/e n = 1/(1.6×10^-19) n = 6.25 × 10^18......● So, the NUMBER of electrons (n) in 1 C of charge is 6.25 × 10^18 e-.

Discussion

6.	car racing car has uniform acceleration of 4 metre per second square what distance will it cover in 10 seconds after start
Answer» A=4, t=10, u=0 s=ut+1/2a(t)SQUARE s=1/2(4)(10)(10) s=2(100) s=200m

Discussion

7.	Why does earth not travel towards the moon if moon attract the earth
Answer» Earth does not travel towards the MOON if moon atreact the earth because mass of earth is very less as compared to earth . hope it HELPS please MARK as BRAINLIEST

Discussion

8.	State three effect of a force given suitable example
Answer» HEY!! Effects of force with examples are:- ✴It can make a stationary OBJECT move. ✔Example: Pushing a box at rest on the table brings the box in motion. ✴It can stop a moving object. ✔Example: CATCHING a moving ball and making it stop on your hand. ✴It can change the speed of a moving object. ✔Example: INCREASING the speed of a bicycle by exerting more force on the peddle. :D

8.

State three effect of a force given suitable example

Answer»

HEY!!

Effects of force with examples are:-

✴It can make a stationary OBJECT move.

✔Example: Pushing a box at rest on the table brings the box in motion.

✴It can stop a moving object.

✔Example: CATCHING a moving ball and making it stop on your hand.

✴It can change the speed of a moving object.

✔Example: INCREASING the speed of a bicycle by exerting more force on the peddle.

:D

Discussion

9.	A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with a speed of15ms−1.15ms−1. The time taken by the stone to reach the ground is
Answer» Time taken by STONE to reach GROUND is $\sqrt{2h \div g}$ time taken is SQUARE root of (2*490\10) which is $7 \sqrt{2}$ hope answer will HELP u please FOLLOW me if u like my answer .

Discussion

10.	Give reason aluminum is used for making electrical wires
Answer» It is a good conductor of electricity(having low resistance) and less expensive n at DA same TIME very LIGHT in wight. HOPE it helps

Discussion

11.	Difference between concave and convex mirrors
Answer» CONCAVE mirror is inner HALLO surface is reflecting surface . and CONVEX mirror is OUTER Hallo surface is reflecting surface . I hope it helps you friend. PLEASE mark me as brainlist

Discussion

12.	1. define force is it necessary for the two bodies to be in direct contact for a force to exist between them explain with examples2. State three effects of a force give suitable examples3. two roads A and B of the same weight and equal length have different thickness a boy by playing with them on a beach health M vertically on the surface of sand as shown in the figure which one of the following will think less explain4. three holes A B and C are made in an Empty can at different levels one over the other as shown in the figure they are temporarily closed with an adhesive tape these the condition of filled with water what will you observe when the tap on all of them is pulled out justify your answer
Answer» Force is an INFLUENCE which tends to move a stationary BODY or STOP a MOVING body or which tends to CHANGE the shape and size of a body.

Discussion

13.	What are streamlined bodies
Answer» It is a SHAPE which reduce the FRICTION of air,water ACTING on a BODY .. I HOPE I HELPED YOU..

Discussion

14.	Convert 30 degree Celsius to degree Fahrenheit and 80 degree fahrenheit to degree Celsius
Answer» To convert temperatures in degrees CELSIUS toFahrenheit, MULTIPLY by 1.8 (or 9/5) and ADD 32.

Discussion

15.	Cu and al wires are usually used for electricity transmission
Answer» CU and aluminium wire is USED for electricity because: 1) they are CHEAPER . 2) they are good conductor of heat . 3) they are melleable and ductile . 4) they are best for WIRING

Discussion

16.	is it possible that the velocity of an object be in a direction other than the direction of acceleration? give example
Answer» ʜᴇʟʟᴏ ᴍᴀᴛᴇ! Yes, its possible that velovity if an OBJECT has different direction as compared to acceleration. For example : Assume that you are driving a CAR with velocity of 50 m/s. SUDDENLY you apply breaks due to RED signal. Assume car decelerates with 5 m/s². In this case direction of velocity was forward while acceleration direction was towards backward. Similarly when you throw BALL upwards then same thing happens. Hope you helps

Discussion

17.	what is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulomb of charge from one terminal of battery to other?
Answer» W = V*Q V = W/q = 250/20 = 12.5 VOLTS

Discussion

18.	Curie is the unit of
Answer» Its UNIT of RADIOACTIVITY... ANS

Discussion

19.	When we put our ear on a railway line,we can hear the sound of approaching train even when the train is far off?
Answer» Since metals have high density so it is OBVIOUS that the sound of TRAIN coming will be heard FAR before than we will hear from the other source ie. AIR. Speed of sound DEPENDS upon the density of source it is travelling from..

Discussion

20.	The screen where the image is formed by the eye lens is named as what?
Answer» Answer: RETINA Explanation: The screen where the image is formed by the eye lens is named RETINA . Retina translates that image into ELECTRICAL NEURAL impulses to the brain to create visual PERCEPTION The primary light-sensing cells in the retina are the photo-receptor cells, which are of two types: rods and CONES. Rods function mainly in DIM light and provide black-and-white vision. Cones function in well-lit conditions and are responsible for the perception of color, as well as high-acuity vision used for tasks such as reading

20.

The screen where the image is formed by the eye lens is named as what?

Answer»

Answer:

RETINA

Explanation:

The screen where the image is formed by the eye lens is named RETINA .

Retina translates that image into ELECTRICAL NEURAL impulses to the brain to create visual PERCEPTION

The primary light-sensing cells in the retina are the photo-receptor cells, which are of two types: rods and CONES.

Rods function mainly in DIM light and provide black-and-white vision.

Cones function in well-lit conditions and are responsible for the perception of color, as well as high-acuity vision used for tasks such as reading

Discussion

21.	The magnification produced by a mirror is +1/3 . Then the mirror is a _______i) concave mirrorii) convex mirroriii) plane mirror
Answer» (II) CONVEX mirror becoz MAGNIFICATION is LESS than ONE and +ve

Discussion

22.	What is the major fuel used in thermal power plants?
Answer» Answer: 1 . Coal 2. Petrol 3. Nuclear 4. Natural Gas Explanation: A THERMAL power station is a power station in which heat ENERGY is converted to electric power. Turbine is steam Driven WATER is heated to generate Steam. Fuel is REQUIRED to Heat Water . Different MAJOR Fuels Used are : 1 . Coal 2. Petrol 3. Nuclear 4. Natural Gas

22.

What is the major fuel used in thermal power plants?

Answer»

Answer:

1 . Coal

2. Petrol

3. Nuclear

4. Natural Gas

Explanation:

A THERMAL power station is a power station in which heat ENERGY is converted to electric power.

Turbine is steam Driven

WATER is heated to generate Steam.

Fuel is REQUIRED to Heat Water .

Different MAJOR Fuels Used are :

1 . Coal

2. Petrol

3. Nuclear

4. Natural Gas

Discussion

23.	If a particle moves through a distance 8 metre due east and 6 meters north then magnitude of displacement is
Answer» DISPLACEMENT = √64+√36 m = √100 m =10 m

Discussion

24.	Slop of speed - time graph determine _____________.
Answer» SLOPE of speed and TIME GRAPH represents acceleration .

Discussion

25.	What is average speed?
Answer» AVERAGE SPEED is a RATE of POSITION changes . average speed = DISTANCE / time

Discussion

26.	How A.U related to light year
Answer» Hey mate here is your answer Simple ARITHMETIC CALCULATION yields the answer that 1 light-year = 63240 AU to a good approximation. hope it help MARK as brainliest

Discussion

27.	To design the body of an aircraft, aluminium alloys are used. Give reasons.
Answer» Answer: Light in Weight , Strong & RESISTANCE to corrosion are MAIN properties which make USE of aluminum alloys to make the body of an aircraft Explanation: aluminum alloys are Light Weight & Strong. Aluminum alloy does not corrode Easily . Aluminum allow keep its strength at HIGHER temperature as well Light in Weight , Strong & Resistance to corrosion are main properties which make use of aluminum alloys to make the body of an aircraft

27.

To design the body of an aircraft, aluminium alloys are used. Give reasons.

Answer»

Answer:

Light in Weight , Strong & RESISTANCE to corrosion are MAIN properties which make USE of aluminum alloys to make the body of an aircraft

Explanation:

aluminum alloys are Light Weight & Strong.

Aluminum alloy does not corrode Easily .

Aluminum allow keep its strength at HIGHER temperature as well

Light in Weight , Strong & Resistance to corrosion are main properties which make use of aluminum alloys to make the body of an aircraft

Discussion

28.	Collect information about the advantages of CNG and LPG and prepare a report on it
Answer» CNG iscompressed natural gas obtained by compressing natural gas that's present above the crude oil under petroleum and gas deposits. It is often USED as a fuel for vehicles. LPG is a fuel used for cooking food. It doesn't release harmful gases. LPG is filled in cylinders under pressure so that the gas remains in LIQUID state. The cylinders have a valve which regulate the pressure. When the valve is OPENED, the pressure inside the cylinder DECREASES and the liquid CHANGES to gas which we use to cook food

Discussion

29.	What does electric circuit mean?
Answer» The FLOW of CURRENT in a CIRCUIT is CALLED ELECTRIC circuit

Discussion

30.	Why do car wheels often slips on an icy roads?
Answer» Because their is very LITTLE FRICTION on ice SURFACE DUE to which car slipps

Discussion

31.	A stone is released form the top of the tour of height 19.6 calculate its final velocity just its touching before the ground
Answer» I THINK it will HELP you

Discussion

32.	Plzzz answer the full page quick
Answer» PIC not CLEAR TRY again

Discussion

33.	Convert 1N into dyne
Answer» 1 newton = 10^ 5 dyne hope you UNDERSTAND. PLZ mark me as BRAINLIEST.

Discussion

34.	Prove E = mc^2. (Th of relativity)
Answer» HEYA PLZ MARK the BRAINLIEST plz FOLLOW me dfgh

Discussion

35.	how would the pressure (exerted by a force on an area) change if -thrust is doubled keeping the area contact
Answer» LET PRESSURE be p and. new pressure be. p' thrust be. F Now P=F/A P'=2F/A. (new PRESSURE = 2×thrust/ area) P'=2P. (new PRESSURE= 2×pressure) THEREFORE PRESSURE WILL ALSO BE DOUBLED

Discussion

36.	What is a system of units? Briefly describe different types of systems of units.
Answer» System of units is a system which COMPRISE of units for different physical quantities accepted by all Different types of systems of units are 1. Cgs I.e centimetre gram SECOND 2. Mks I.e METRE kilogram second 3. FPS ie foot pound second

Discussion

37.	Why does the nose of a mountaineer bleed at high altitudes
Answer» As the altitude increases the atmospheric pressure decrease. And the air becomes thinner and there will be very less oxygen at HIGH altitude. So DUE to which the blood vessels present inside our their nose BURSTS and startsbleeding.

Discussion

38.	A particle projected from ground moves at an angle 45 degrees at horizontal one second after projection and speed is minimum two seconds after the projection. The angle of projection of particle is
Answer» HEY mate !!! It DEPENDS on what value you use for g. I'll use g=-10m/s² (with the convetion upwards is positive, negative is DOWNWARDS). But you might be expected to use -9.8m/s² or -9.81m/s²; of course, the method is the same. Also we must assume air resistance is negligible. ___________________________ The speed is minimum at the highest point. This is because at the highest point, the VERTICAL component of velocity = 0 and the horizontal component of velocity is constant during the flight. If the initial vertical component of velocity is uy, during the first 2s the vertical component of velocity drops from uy to 0. Using the standard equation 'V = u+at' for the vertical motion: 0 = uy + at 0 = uy + (-10)2 uy = 20m/s _________________ After 1s: vy = uy + at vy = 20 + (-10)1 vy = 10m/s After 1s, the direction is 45° to the horizontal so the x and y components of velocity (vx, vy) are equal. So vx = vy = 10m/s. vx is constant throughout the flight. The initial angle of launch, θ, is given by: tanθ = uy/vx = 20/10 = 2 θ = tan⁻¹(2) = 63°

Discussion

39.	Speed of a car is 108km/h express this speed in kilometre/minute
Answer» Given that..... SPEED of CAR in km/h = 108 km/h => Speed of car in km/min = 108/60 => 1.8 km/min HOPE IT HELPS ☺

Discussion

40.	What is the formula of permittivity of vacuum?
Answer» The permittivity of FREE SPACE (a VACUUM) is a physical constant EQUAL to approximately 8.85 x 10-12 farad PER meter (F/m). It is symbolized o.

Discussion

41.	Two bodies of same masses are placed at height h and 2h.Campare their gravitational potential energy.
Answer» Hiii dear ______ ______________________ GOOD evening _________________________________ here is your answer_________ Potential energy = mgh Ratio of potential ENERGIES of A and B = mgh/(2mgh) = 1/2 = 0.5

Discussion

42.	What precautions should be taken to avoid the overloading of a dosmetic electric current
Answer» Do not PLUG more ELECTRONIC's on ONE SWITCH

Discussion

43.	a particle starts from rest with uniform acceleration a. its velocity after n seconds is v. the displacement of the particle in the last two seconds is???
Answer» S=ut+1/2at^2 (as U= 0 ) s=1/2a2^2 s=2a it's best ANSWER. please MARK it as brainlist hope it helps u don't forget to thank me.

Discussion

44.	Describe an experiment to determine the density of liquid?
Answer» Take liquid in MEASURING beaker and WEIGH them we know that density is mass PER unit volume now CALCULATE density make ME BRAINLIEST IF U LIKE

Discussion

45.	What is the nature of force in "A Book is lying on the table"
Answer» FORCE is acting on 90 degree angle and HENCE force BECOMES is ZERO

Discussion

46.	A train is moving at a uniform speed of 75 km/hour.how far will it travel in 20 minutes
Answer» 75×1/3=25 KM.........

Discussion

47.	What is displacement in physics xoncise physics?
Answer» ^_^ Physics is the act of MATCHING a computer program output to a natural SYSTEM, so that aspects of the PHYSICAL system are matched by the computer program... Any predictive program works, but the fundamental physics is ambitious, in that it wishes to be able to match a computer program to any conceivable situation,..so that it can reproduce the RESULTS of the situation as best possible... #Keep SMILING!..

47.

What is displacement in physics xoncise physics?

Answer»

^_^

Physics is the act of MATCHING a computer program output to a natural SYSTEM, so that aspects of the PHYSICAL system are matched by the computer program...

Any predictive program works, but the fundamental physics is ambitious, in that it wishes to be able to match a computer program to any conceivable situation,..so that it can reproduce the RESULTS of the situation as best possible...

#Keep SMILING!..

Discussion

48.	How to prevent slippery in rope or hands while playing tug - of - war
Answer» How to prevent slippery in rope or hands while PLAYING TUG - of - war MAKE sure you APPLY the sand that makes your hand rough

Discussion

49.	Motion of a vehicle in heavy traffic is uniform or non uniform?
Answer» HEY BUDDY...!!! HERE'S THE ANSWER... ______________________ ⏺️ Motion of a vehicle in heavy traffic is NON uniform ... because in heavy traffic we have to KEEP our SPEED as per the traffic . And speed is not inform it keep changing... HOPE HELPED.. GOOD NIGHT.. :-)

Discussion

50.	Is concave mirror converging or diverging
Answer» CONCAVE MIRROR is CONVERSING

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A force of 12N acts on a mass of 1.5 kg at rest for 3s. Find the final v and the momentum of the body after 3s.

2 parallel plate air capacitor have there plate areas 100&500cm square . If they have the same charge& the dist. Between the plates of the 1 capacitor 0.5 mm what is the distance between the plate of 2 capacitor

A truck starts from rest and rolls down on a hill with a constant acceleration it travel a distance of 400m in 20 sec find its acceleration. Find the force acting on it if it's mass is 7 tonnes(1 tonne=1000kg)

Calculate the number of electrons constituting one columb of charge

car racing car has uniform acceleration of 4 metre per second square what distance will it cover in 10 seconds after start

Why does earth not travel towards the moon if moon attract the earth

State three effect of a force given suitable example

A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with a speed of15ms−1.15ms−1. The time taken by the stone to reach the ground is

Give reason aluminum is used for making electrical wires

Difference between concave and convex mirrors

What are streamlined bodies

Convert 30 degree Celsius to degree Fahrenheit and 80 degree fahrenheit to degree Celsius

Cu and al wires are usually used for electricity transmission

is it possible that the velocity of an object be in a direction other than the direction of acceleration? give example

what is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulomb of charge from one terminal of battery to other?

Curie is the unit of

When we put our ear on a railway line,we can hear the sound of approaching train even when the train is far off?

The screen where the image is formed by the eye lens is named as what?

The magnification produced by a mirror is +1/3 . Then the mirror is a _______i) concave mirrorii) convex mirroriii) plane mirror

What is the major fuel used in thermal power plants?

If a particle moves through a distance 8 metre due east and 6 meters north then magnitude of displacement is

Slop of speed - time graph determine _____________.

What is average speed?

How A.U related to light year

To design the body of an aircraft, aluminium alloys are used. Give reasons.

Collect information about the advantages of CNG and LPG and prepare a report on it

What does electric circuit mean?

Why do car wheels often slips on an icy roads?

A stone is released form the top of the tour of height 19.6 calculate its final velocity just its touching before the ground

Plzzz answer the full page quick

Convert 1N into dyne

Prove E = mc^2. (Th of relativity)

how would the pressure (exerted by a force on an area) change if -thrust is doubled keeping the area contact

What is a system of units? Briefly describe different types of systems of units.

Why does the nose of a mountaineer bleed at high altitudes

A particle projected from ground moves at an angle 45 degrees at horizontal one second after projection and speed is minimum two seconds after the projection. The angle of projection of particle is

Speed of a car is 108km/h express this speed in kilometre/minute

What is the formula of permittivity of vacuum?

Two bodies of same masses are placed at height h and 2h.Campare their gravitational potential energy.

What precautions should be taken to avoid the overloading of a dosmetic electric current

a particle starts from rest with uniform acceleration a. its velocity after n seconds is v. the displacement of the particle in the last two seconds is???

Describe an experiment to determine the density of liquid?

What is the nature of force in "A Book is lying on the table"

A train is moving at a uniform speed of 75 km/hour.how far will it travel in 20 minutes

What is displacement in physics xoncise physics?

^_^

Physics is the act of MATCHING a computer program output to a natural SYSTEM, so that aspects of the PHYSICAL system are matched by the computer program...

Any predictive program works, but the fundamental physics is ambitious, in that it wishes to be able to match a computer program to any conceivable situation,..so that it can reproduce the RESULTS of the situation as best possible...

#Keep SMILING!..

How to prevent slippery in rope or hands while playing tug - of - war

Motion of a vehicle in heavy traffic is uniform or non uniform?

Is concave mirror converging or diverging