67486 + Interview Questions in Secondary School in Physics

1.	Why question mark look like this?
Answer» The SIX stars that FORM a backward QUESTION mark are more popularly KNOWN as the “Sickle” in the constellation of Leo, the Lion. $i \: hope \: this \: will \: help \: uhh \:$ ❄❄❄❄❄❄❄❄❄❄❄❄❄❄

Discussion

2.	A ball rolls off a table and hits the floor at 5m/s. what is the height of the table.....PLEASE FAST......
Answer» Dear Student, When a ball rolls off a table, the TIME it TAKES to hit the floor is a FUNCTION of the height of the table only and it does not depend on the SPEED. T = $\sqrt{2h \gamma g$

Discussion

3.	Indian scientist who was primarily responsible for setting of nuclear reactors in india.
Answer» Homi Jehangir BHABHA was an Indian nuclear scientist who was PRIMARILY responsible for setting up of nuclear reactors in India. He was also a professor of physics at Tata INSTITUTE of Fundamental Research. He was REWARDED with 'Padma Bhushan' by the government of India. Atomic energy establishment in Mumbai is NAMED after him.

3.

Indian scientist who was primarily responsible for setting of nuclear reactors in india.

Answer»

Homi Jehangir BHABHA was an Indian nuclear scientist who was PRIMARILY responsible for setting up of nuclear reactors in India. He was also a professor of physics at Tata INSTITUTE of Fundamental Research.

He was REWARDED with 'Padma Bhushan' by the government of India. Atomic energy establishment in Mumbai is NAMED after him.

Discussion

4.	Jason goes scuba diving in honduras, where the density of the water in the ocean is 1025 kg/m . Assuming the pressure of the air is 1.0 atm, what is the pressure when jason is 16.9 m below the surface? Give your answer in units of atm. Hint1: recall that 1 atm 101.3 kpa
Answer» <P>P= ATM(P)+ρgh P= 101300+ 1025×9.8×16.9 P= 101300+169760.5 P = 271060.5 Pa P = 271060.5/101300 P== 2.676 atm

4.

Jason goes scuba diving in honduras, where the density of the water in the ocean is 1025 kg/m . Assuming the pressure of the air is 1.0 atm, what is the pressure when jason is 16.9 m below the surface? Give your answer in units of atm. Hint1: recall that 1 atm 101.3 kpa

Answer»

<P>P= ATM(P)+ρgh

P= 101300+ 1025×9.8×16.9

P= 101300+169760.5

P = 271060.5 Pa

P = 271060.5/101300

P== 2.676 atm

Discussion

5.	A body is dropped from height of 120 m .after 2 sec gravity disappears . find total time taken by body to reach the ground.
Answer» s= 1/2gt² s=1/2102² s=20 m v= gt v = 10×2 v= 20 m/s when gravity disappears , the VELOCITY is constant for the REST of 100 m. v= s/t 20= 100/t t= 100/20 t= 5 sec. Total time = 5+2= 7 sec.

5.

A body is dropped from height of 120 m .after 2 sec gravity disappears . find total time taken by body to reach the ground.

Answer»

s= 1/2*g*t²

s=1/2*10*2²

s=20 m

v= gt

v = 10×2

v= 20 m/s

when gravity disappears , the VELOCITY is constant for the REST of 100 m.

v= s/t

20= 100/t

t= 100/20

t= 5 sec.

Total time = 5+2= 7 sec.

Discussion

6.	Pls answer it is urgent
Answer» If you STILL have any PROBLEMS ASK me...

Discussion

7.	How is surface tension related to surface energy
Answer» this means there is high density at the surface of a liquid .Contact angle measurement can be used to determine the surface ENERGY of the MATERIAL .The cohesive FORCES between the molecules are RESPONSIBLE for the PHENOMEN known as surface tension

Discussion

8.	The moon of a body is 20kg. What is its weight on earth?
Answer» TYPO its not MOON its MASS...

Discussion

9.	What is the diffnetion of time asat
Answer» ASAT - of or relating to a system to destroy SATELLITES in orbit; "antisatellite weapons this is UR ANSWER:☺️

Discussion

10.	Concept of rotating magnetic field in 3 phase induction motor
Answer» When the primary winding or the stator is connected to a 3 phase AC source, it establishes a rotating magnetic fieldwhich rotates at the synchronous speed. SECRETS Behind the Rotation: According to Faraday's law an emf induced in any circuit is DUE to the rate of change of magnetic flux linkage through the circuit. The three phase currents flow simultaneously through the windings and are displaced from each other by 120° electrical. Each alternating .phase current produces its own flux which is sinusoidal. So all three fluxes are sinusoidal and are separated from each other by 120°. If the phase sequence of the windings is R-Y-B, then mathematical equations for the instantaneous values of the three fluxes ΦR , ΦY ,ΦB can be written as, ΦR = Φmsin(ωt) ΦY = Φmsin(ωt - 120) ΦB = Φmsin(ωt - 240) As windings are identical and supply is balanced, the magnitude of each flux is Φm this is UR answer:☺️☺️

Discussion

11.	In which direction does a magnetic compass needle rest in space?
Answer» If you put a compass into outer SPACE, it WOULD still point to geographic north POLE. HOPE this helps and good luck! :)

Discussion

12.	Name the physical quantity represented by volt, amphere
Answer» Hey mate here is your ANSWER - CURRENT is the physical quantity REPRESENTED by volt , amphere. hope this HELPS you

Discussion

13.	A ball dropped from height travels 5 m in 6 sec find th speed
Answer» The ANSWER to the QUESTION is GIVE above...

Discussion

14.	In rotational equilibrium how to decide if torque is clockwise or anticlockwise
Answer» I HOOE You UNDERSTOOD...For further PROBLEMS KINDLY CONTACT me...

Discussion

15.	Number of modes of vibration per unit volume between 10000a and 10020a?
Answer» In old quantum theory max Planck derived the energy density of BLACK body radiation , for that purpose he calculated the no. Of modes in the CAVITY and those are actually standing waves ,different standing waves are different modes And if LENGTH is L and wavelength is λ then L=nλ/2 And from intuition I can say these no. Of modes will be finite and so in INTEGER number (If I say that number of modes is 5 , means there could be 5 different possible of modes or orientation of standing wave but ,There is no meaning of no. Of modes being 2.5 or 1.3 like these fractions ,they are only in inegers) But Planck calculated no. Of modes is 8πν^2/c^3 Now here I think" 8πν^2/c^3" is not an integer (as π is not integer) Then how can no. Of modes be fraction??

Discussion

16.	What is formula of thrust
Answer» T = m_dot X ∆V T - thrust m_dot - the mass FLOW rate that is ejected from the ENGINE ∆V - the change in VELOCITY of the mass flow ejected from the engine

Discussion

17.	What is the meaning of watt
Answer» The MEANING of WATT is in (unit) or a BOTU its mean (BOARD of TRADE unit

Discussion

18.	Can acceleration be negative
Answer» YES if V is SMALLER than U

Discussion

19.	Explain why a man jumping from a running train falls with his head towards the engine
Answer» The answer to the question is very simple when the MAN was in the train is Momentum was not zero WHEREAS his Momentum Was equal to his mass and VELOCITY of the train so when the man JUMPS out of the train his Momentum is not zero is Momentum has some value due to which he continues to move in the DIRECTION at which train is traveling

Discussion

20.	Explain the accelerometer sensor working.
Answer» There are MANY different ways to make an accelerometer! Some ACCELEROMETERS use the PIEZOELECTRIC effect - they contain microscopic CRYSTAL structures that get stressed by accelerative forces, which causes a voltage to be generated. Another way to do it is by sensing changes in CAPACITANCE.

Discussion

21.	If volume of a body is v , density d floats in a liquid of density rho with a part submerged. Calculate volume of a body submerged in the liquid in terms of total volume of the body ?
Answer» Two particles of mass 200 g each are placed at a SEPARATION of 10 cm. Assume that the only forces acting on them are DUE to their gravitational attraction. FIND the acceleration of each when they are allowed to move.

Discussion

22.	A body is moving with uniform acceleration . Its velocity after 5 seconds is 25 m/s . Calculate the distance it will cover in 10th second
Answer» at t=5 sec INITIAL velocity u = 25m/s at t=8 sec final velocity v =34m/s the time INTERVAL for which the car travelled = 8-5 = t = 3 sec therefore the constant acceleration a is given by a= (v-u)/t a=(34-25)/3 a=3m/s^2 therefore initial velocity at t=0 u1=v-at u1=34-3(8) u1=10m/s the distance it will cover in the tenth SECONDS is equal to (the distance covered after 9 SECS) - ( the distance covered after 10 secs) we use the formula s=ut+1/2 at^2 therfore distance covered after 9 secs = 10(9) + 1/2(3)(9)^2=211.5m similarly distance covered after 10 sec = 10(10) + 1/2(3)(10)^2=250m therefore distance covered in the tenth second=250-211.5=38.5m

22.

A body is moving with uniform acceleration . Its velocity after 5 seconds is 25 m/s . Calculate the distance it will cover in 10th second

Answer»

at t=5 sec INITIAL velocity u = 25m/s

at t=8 sec final velocity v =34m/s

the time INTERVAL for which the car travelled = 8-5 = t = 3 sec

therefore the constant acceleration a is given by

a= (v-u)/t

a=(34-25)/3

a=3m/s^2

therefore initial velocity at t=0

u1=v-at

u1=34-3(8)

u1=10m/s

the distance it will cover in the tenth SECONDS is equal to

(the distance covered after 9 SECS) - ( the distance covered after 10 secs)

we use the formula s=ut+1/2 at^2

therfore distance covered after 9 secs = 10(9) + 1/2(3)(9)^2=211.5m

similarly distance covered after 10 sec = 10(10) + 1/2(3)(10)^2=250m

therefore distance covered in the tenth second=250-211.5=38.5m

Discussion

23.	At what height `h' from the earth surface, acceleration due to gravity becomes half as that of acceleration due to gravity on the surface of earth.
Answer» Jskwkjenb2b. . but then some be. and if you are wondering how you doing with yourself, or the contents of the SPELL Quest exam. . . but I have to study all 20 E the KITCHEN with her

Discussion

24.	Give some example of frictional force
Answer» EXAMPLES of frictional force are:- RUBBING both HANDS together to create heat. A sled sliding across snow or ice. Skis sliding against snow. A coaster sliding against a table. A WASHING machine pushed along a floor. hope it's HELP you...

Discussion

25.	Give example of friction force
Answer» HI friend, friction can be in different forms. ex;tyres HEAT up due to friction between their rubber and the road. ex2;door MAKES CREAKING sound due to friction in its hinges. -please mark this answer as brainliest if it helped you!

Discussion

26.	Give example of frictional force
Answer» Specific examples of SLIDING FRICTION including. Rubbing both hands together to create heat. A SLED sliding across snow or ICE. A person sliding down a slide is an example of sliding friction. Skis sliding against snow. These are the example of frictional FORCE

Discussion

27.	Difference of 1°C equals the difference of 274k in kelvin scale true or false
Answer» False difference of 1 °C=diff 1 K on KELVIN SCALE.

Discussion

28.	Define lateral inversion
Answer» The effect PRODUCED by a MIRROR in REVERSING IMAGES from left to RIGHT

Discussion

29.	What do you mean by eutectic point?
Answer» HOPE HELPFUL PLEASE MARK me

Discussion

30.	What is the conversion factor between SI and CGS unit of work?
Answer» its SIMPLE its ALWAYS 100

Discussion

31.	What do we need for a sound to propagate???
Answer» We NEED a MEDIUM for SOUND to PROPAGATE

Discussion

32.	A force of 7n acts on a body for 1minute, what is the charge in momentum
Answer» ⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑ ▬▬▬▬▬▬▬▬▬▬▬▬☟ ➧ Change in momentum ➾ force × time ➾ 7 N × 60s ➾ 420 NS ...✔ _________ Thanks...✊

Discussion

33.	Give some example of applied force
Answer» EX:- all objects EXERT gravitational forces. ex:- Opposing force including drag due to INTERACTION with an air mass and the force due to friction between two objects. ex:- Holding an object. ex:- Rolling an BALL.

Discussion

34.	Due to high specific heat of water land is heated more quickly than water true or false
Answer» $\huge{\red{Heya:mate}}$ $\huge{\blue{Answer}}$ ⤵⤵ $\huge{\green{<klux>WATER</klux>}}$ ▶ $\text{[math]}$ ▶▶Due to HIGH specific HEAT of water LAND is heated more quickly than water▶▶ ⭐ This statement is true✔✔

Discussion

35.	Example of applied force
Answer» PULLING ,PUSHING RAISING of FLOOR

Discussion

36.	At 4°C water has maximum density true or false
Answer» It is true at 4degree celcius WATER has MAXIMUM density. because at this temprature TWO opposite forces are in balance explanation. the NORMAL density of water is 1.0g cm3inverse at o DEGREE celcous. hope it helps.

Discussion

37.	How length of coductor effect the strength of force?
Answer» The magnitude of MAGNETIC force also depends on the LENGTH of the WIRE(conductor) in the magnetic FIELD.the LONGER the wire in the magnetic field, larger the force of the wire.

Discussion

38.	A motorcyclist starts from point A with a uniform speed 30 km per hour to reach the point B. A motorcyclist starts with a speed of 20km per hour. What is average speed of motor cycle?
Answer» And.will 70 of SPEED

Discussion

39.	Plzzzz plzzz ans... what is the ratio of volume of atom to the volume of nucleus?
Answer» The VOLUME of an ATOM is about 15 ORDERS of magnitude LARGER than the volume of a nucleus.

Discussion

40.	Which isotope is used for treatment of goiter
Answer» An ISOTOPE of Iodine known as Io-131 is USED for the treatment of GOITRE. Hope this ANSWER helps you mate. Please mark me as the BRAINLIEST one. Thank you.

Discussion

41.	What is the boiling point of water in 76 cm pressure
Answer» BOILING point of WATER is 100 DEGREES CELSIUS mark it as brain list answer

Discussion

42.	If the critical angle for a total internal reflection from a medium to vaccinate is 60°.Then velocity of light in a medium is
Answer» It depend on their REFRACTIVE index from which medium the LIGHT is pass if its pass in the on medium the VELOCITY of light does not CHANGE

Discussion

43.	A person having miopic eyes uses a concave lens of 50 cm. Find its power?
Answer» To FIND the power of the lens, ALWAYS convert focal length into METERS. As the focal length of concave lens is negative, we can use the formula: Power (P) = 1/focal length in meters(f) =-1/0.5 =-2 dioptre Hope I helped you. GREAT DAY ahead!

Discussion

44.	the period of the moon around the earth is 28 days and the radius of its orbit is 410 to the power of 5 km, if G =6.6710 to the power of -11.Find the mass of the earth?
Answer» The period of the moon is calculated from this equation: $T=\frac{2\pi <klux>R</klux>}{v}.$ Where r is the radius of the orbit and v is the velocity. Since the moon moves in a circular motion, therefore, the centripetal force is: $F_c=\frac{mv^2}{r}$ . In this EXAMPLE, the gravitational force of the Earth acts as the centripetal force. therefore, $F_g=F_c$ . Therefore, $\frac{Gm_mm_e}{r^2}=\frac{m_mv^2}{r}$ . Where $m_m$ is the mass of the moon and $m_e$ is the mass of earth. $\frac{Gm_mm_e}{r^2}=\frac{m_mv^2}{r}$ $\frac{Gm_e}{r}=v^2\\ v=\sqrt{\frac{Gm_e}{r}}$ . Substitute by $v$ in the period equation: $T=\frac{2\pi r}{\sqrt{\frac{Gm_e}{r} } }\\T=2\pi \sqrt{\frac{r^3}{Gm_e} }$ . The required is $m_e$ . But first, we NEED to convert the period from DAYS to seconds. *Therefore, T = 28 days24 hours* 60 MINUTES60 seconds = 2419200 seconds.* Therefore, $2419200=2\pi \sqrt{\frac{(410^510^3)^3}{6.6710^{-11}m_e} }\\385027.6=\sqrt{\frac{9.5910^{35}}{m_e}} \\(385027.6)^2=\frac{9.5910^{35}}{m_e}$ $m_e=\frac{9.5910^{35}}{(385027.6)^2}=6.410^{24}\:kg$ Therefore,

44.

the period of the moon around the earth is 28 days and the radius of its orbit is 410 to the power of 5 km, if G =6.6710 to the power of -11.Find the mass of the earth?

Answer»

The period of the moon is calculated from this equation: $T=\frac{2\pi <klux>R</klux>}{v}.$ Where r is the radius of the orbit and v is the velocity.

Since the moon moves in a circular motion, therefore, the centripetal force is: $F_c=\frac{mv^2}{r}$ .

In this EXAMPLE, the gravitational force of the Earth acts as the centripetal force. therefore, $F_g=F_c$ .

Therefore, $\frac{G*m_mm_e}{r^2}=\frac{m_mv^2}{r}$ . Where $m_m$ is the mass of the moon and $m_e$ is the mass of earth.

$\frac{G*m_mm_e}{r^2}=\frac{m_mv^2}{r}$

$\frac{Gm_e}{r}=v^2\\ v=\sqrt{\frac{Gm_e}{r}}$ .

Substitute by $v$ in the period equation:

$T=\frac{2\pi r}{\sqrt{\frac{Gm_e}{r} } }\\T=2\pi \sqrt{\frac{r^3}{Gm_e} }$ .

The required is $m_e$ . But first, we NEED to convert the period from DAYS to seconds.

Therefore, T = 28 days*24 hours* 60 MINUTES*60 seconds = 2419200 seconds.

Therefore, $2419200=2\pi \sqrt{\frac{(4*10^5*10^3)^3}{6.67*10^{-11}*m_e} }\\385027.6=\sqrt{\frac{9.59*10^{35}}{m_e}} \\(385027.6)^2=\frac{9.59*10^{35}}{m_e}$

$m_e=\frac{9.59*10^{35}}{(385027.6)^2}=6.4*10^{24}\:kg$ Therefore,

Discussion

45.	A piece of wire of resistance r is cut into 5 equal parts these parts are then connected in parallel its
Answer» ⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑ ▬▬▬▬▬▬▬▬▬▬▬▬☟ ➧ Resistance of a PIECE of wire is PROPORTIONAL to its length. A piece of wire has a resistance R. The wire is CUT into five equal parts. ➧ Therefore, resistance of each part ➾ R/5 ➧ All the five parts are connected in parallel. ∴equivalent resistance (R') is given as 1 / R' ➾ 5 / R + 5 / R + 5 / R + 5 / R + 5 ➾ 5 + 5 + 5 + 5 + 5 / R ➾ 1 / R' = 25 / R ➾ R / R' = 25 ...✔ _________ Thanks...✊

Discussion

46.	If two positive point charges q are placed on the x- axis , one at x=a and other at x=-a then electric field is max. At y=
Answer» Rohit FOCUSED the image of a candle flame on a white SCREEN USING a convex lens is noted down the position of the candle screen and lens as under position of candle is EQUAL to 26 CM

Discussion

47.	What is the boiling point of water at 76 cm
Answer» 76 cm of MERCURY is equal to ATMOSPHERIC pressure. So the boiling POINT of WATER will be 100 degree Celsius

Discussion

48.	The normal melting point of ice is
Answer» 0 DEGREE C or 273K i hope this HELPS you

Discussion

49.	a 50 micro farad capacitor is charged to 3000v. The energy stored in capacitor is sent through victim during pulse of duration 2ms.the power of pulse is?
Answer» <P>The definition of "Capacitance" is the ratio of CHANGE in electric charge to the change in electric potential. THEREFORE, C = Q/V. Which means that the electric charge, Q = C.V = $5010^{-6}<klux>3000</klux>=0.15$ Coulomb. Energy stored in the capacitor can be explained as the work done. Since the definition of "Voltage" is the energy stored per unit charge, therefore, *E = Q.V = 0.153000 = 450 J.** Power is the energy per unit time. Therefore, P = E/t = $\frac{450}{2*10^-3}=225KWatt$

49.

a 50 micro farad capacitor is charged to 3000v. The energy stored in capacitor is sent through victim during pulse of duration 2ms.the power of pulse is?

Answer»

<P>The definition of "Capacitance" is the ratio of CHANGE in electric charge to the change in electric potential.

THEREFORE, C = Q/V. Which means that the electric charge, Q = C.V = $50*10^{-6}*<klux>3000</klux>=0.15$ Coulomb.

Energy stored in the capacitor can be explained as the work done. Since the definition of "Voltage" is the energy stored per unit charge, therefore, E = Q.V = 0.15*3000 = 450 J.

Power is the energy per unit time. Therefore, P = E/t = $\frac{450}{2*10^-3}=225KWatt$

Discussion

50.	What is electromagnet? ( very bad in physics)
Answer» An electromagnet is a temporary MAGNET which is MADE by WINDING a coil around a bar of soft iron. It shows all the property of magnet. But it's Strength and POLE can be CHANGED.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why question mark look like this?

A ball rolls off a table and hits the floor at 5m/s. what is the height of the table.....PLEASE FAST......

Indian scientist who was primarily responsible for setting of nuclear reactors in india.

Jason goes scuba diving in honduras, where the density of the water in the ocean is 1025 kg/m . Assuming the pressure of the air is 1.0 atm, what is the pressure when jason is 16.9 m below the surface? Give your answer in units of atm. Hint1: recall that 1 atm 101.3 kpa

A body is dropped from height of 120 m .after 2 sec gravity disappears . find total time taken by body to reach the ground.

Pls answer it is urgent

How is surface tension related to surface energy

The moon of a body is 20kg. What is its weight on earth?

What is the diffnetion of time asat

Concept of rotating magnetic field in 3 phase induction motor

In which direction does a magnetic compass needle rest in space?

Name the physical quantity represented by volt, amphere

A ball dropped from height travels 5 m in 6 sec find th speed

In rotational equilibrium how to decide if torque is clockwise or anticlockwise

Number of modes of vibration per unit volume between 10000a and 10020a?

What is formula of thrust

What is the meaning of watt

Can acceleration be negative

Explain why a man jumping from a running train falls with his head towards the engine

Explain the accelerometer sensor working.

If volume of a body is v , density d floats in a liquid of density rho with a part submerged. Calculate volume of a body submerged in the liquid in terms of total volume of the body ?

A body is moving with uniform acceleration . Its velocity after 5 seconds is 25 m/s . Calculate the distance it will cover in 10th second

At what height `h' from the earth surface, acceleration due to gravity becomes half as that of acceleration due to gravity on the surface of earth.

Give some example of frictional force

Give example of friction force

Give example of frictional force

Difference of 1°C equals the difference of 274k in kelvin scale true or false

Define lateral inversion

What do you mean by eutectic point?

What is the conversion factor between SI and CGS unit of work?

What do we need for a sound to propagate???

A force of 7n acts on a body for 1minute, what is the charge in momentum

Give some example of applied force

Due to high specific heat of water land is heated more quickly than water true or false

Example of applied force

At 4°C water has maximum density true or false

How length of coductor effect the strength of force?

A motorcyclist starts from point A with a uniform speed 30 km per hour to reach the point B. A motorcyclist starts with a speed of 20km per hour. What is average speed of motor cycle?

Plzzzz plzzz ans... what is the ratio of volume of atom to the volume of nucleus?

Which isotope is used for treatment of goiter

What is the boiling point of water in 76 cm pressure

If the critical angle for a total internal reflection from a medium to vaccinate is 60°.Then velocity of light in a medium is

A person having miopic eyes uses a concave lens of 50 cm. Find its power?

the period of the moon around the earth is 28 days and the radius of its orbit is 4*10 to the power of 5 km, if G =6.67*10 to the power of -11.Find the mass of the earth?

A piece of wire of resistance r is cut into 5 equal parts these parts are then connected in parallel its

If two positive point charges q are placed on the x- axis , one at x=a and other at x=-a then electric field is max. At y=

What is the boiling point of water at 76 cm

The normal melting point of ice is

a 50 micro farad capacitor is charged to 3000v. The energy stored in capacitor is sent through victim during pulse of duration 2ms.the power of pulse is?

What is electromagnet? ( very bad in physics)

the period of the moon around the earth is 28 days and the radius of its orbit is 410 to the power of 5 km, if G =6.6710 to the power of -11.Find the mass of the earth?