67486 + Interview Questions in Secondary School in Physics

1.	Any product show energy =100 kcal what ths means
Answer» Hey!!! i am atharv here... first of all you NEED know what is calories ....... the energy REQUIRED by our body is KNOWN as calories so if an product show energy of 100 kcal means 100 calories of energy is in the product contain ..... if you understand then MARK me as BRAINLIEST answer thankyou

Discussion

2.	Disadvantages of biomass fuel
Answer» Polute. the ENVIRONMENT. do not more ENERGY produce. ball

Discussion

3.	A high frequency sound can be detected by
Answer» By USING ULTRA SONOGRAPHY we can DETECT

Discussion

4.	A force f acts on a particle whose positio.vector is r.what is torque about the origin
Answer» 0 Home » Forum » MECHANICS » Find the TORQUE of a force F(vector)... Find the torque of a force F(vector) =3i+j+5k at a point r(vector)=7i+3j+k a) 14i-38j+16k b) 4i+4j+6k c) -21i+4j+4k d) -14i+34j-16k 5 months ago Answers : (1) Dear Ishika Torque = r(vector) x F(vector) Torque = (7i +3j +k) x (3i + j +5k) Torque = 7k -35 j -9K +15 i + 3j -i Torque = 14 i -32 j -2k Options are WRONG according to the DATA in the question.

Discussion

5.	Angular velocity of the rigid link AB is constant 4 rad/sec clockwise
Answer» I can't UNDERSTAND the QUESTION so PLEASE UPDATE the question.

Discussion

6.	Angular 4 performance testingular 2 performance testing
Answer» SQUARE PLUS RECTANGLE 23R

Discussion

7.	In a compound microscope, the focal length of the objective and the eye lens are 2.5 cm and 5 cm respectively. An object is placed at 3.75 cm before the objective and image is formed at the least distance of distinct vision, then the distance between two lenses will be (i.e. length of the microscopic tube)A) 11.67 cm B) 12.67 cm C) 13.00 cm D) 12.00 cm
Answer» Given fe=3cm and fo=1.2cm uo=1.25cm ve=∞ From , 1/uo+1/vo=1/fo , we get 1/vo=1/1.2−1/1.25 vo=30cm MAGNIFICATION of microscope m=vo/uo(1+Dfe) m=30/1.25(1+253)≃200 .

Discussion

8.	Which is the brighteat star in the world?
Answer» SUN is the briggetest STAR in the WORLD

Discussion

9.	The distance between a convex lens and a plane mirror is 10 cm. The parallel rays incident on the convex lens after reflection from the mirror form image at the optical centre of the lens. Focal length of lens will beA) 10 cm B) 20 cm C) 30 cm D) Cannot be determined
Answer» I THINK the ANSWER will be the OPTION b 20 CM

Discussion

10.	Why lightning occurs first then thundering. ?
Answer» The reason because remember, light always travel faster thansound. Therefore, lightning shows up first then thunder occurs split SECONDS after. ... On the ground fire burst , loud crack , fire into the SKY as the SOUND WAVES have you CONFUSED.

Discussion

11.	What are bio mass fuels
Answer» BIOMASS fuels consist of organic MATTER that can be USED to generate ENERGY. The primary advantage of biomass fuels is that they are renewable sources of energy. They can consist of plant or animal matter or be recovered from municipal solid WASTE.

Discussion

12.	How is dynamics related to physics? answer urgently please!
Answer» Dynamics. Dynamics, branch of physical SCIENCE and subdivision of MECHANICS that is concerned with the motion of material objects in relation to the physical factors that affect them: FORCE, mass, momentum, energy. ... This law states that the force ACTING on a body is equal to the rate of change of the body's momentum.

Discussion

13.	A charge q is enclosed by a gaussian spherical surface of radius r
Answer» GIVEN that Q is ENCLOSED by SURFACE ELECTRIC field=ka/r.r

Discussion

14.	An astronaut in outer space will observe sky as
Answer» BLACK SEEN the OUTER SPACE to ASTRONAUTS

Discussion

15.	An earth station is situated in london needs to calculate the look at angle
Answer» What is the QUESTION? pls ASK clear question for better answers.

Discussion

16.	A charged particle having some mass is resting in equilibruim at a height h above the centre of a uniformly charged
Answer» DODGE SM ks if ADD all d EH fb mk da ac

Discussion

17.	A body of mass m is moving in a circle of radius r with angular velocity find expression for centripetal force acting on it using the method of dimensional analysis
Answer» Mv^2/2 is the ANSWER

Discussion

18.	An acceleration of a heavily loaded vehicle is given by the second order equation
Answer» Home / study / engineering / computer science / computer science questions and answers / an acceleration An acceleration of a heavily loaded vehicle is given by the second order equation (the independent variable m is squared): USING MATLAB ASWER THE FOLLOWING QUESTIONS A. Write a function that performs linear REGRESSION by linearising the saturation-growth rate (SGR) model. function [F, V] = LinRegrSGR(x, y, order) B. Use the function written in part A to estimate F and V using the data below. Then plot the RAW data as red squares and determine the a0, a1 and R2 values. [m] =[1.3 1.8 3 4.5 6 8 9] a =[0.07 0.13 0.22 0.275 0.335 0.35 0.36] C . Plot the fitted curve from m = 1 to 10 with a spacing of 0.1 with a blue dashed line. Place the legend in the north-west location

Discussion

19.	A moving coil instrument gives a full scale deflection of 20mA when potential difference across its terminal is 200mV. Calculate (i) the shunt resistance for measuring current up to 20A (ii) the series resistance for measuring voltage up to 400V.
Answer» You are DESCRIBING an OHM meter. Here is an example of how to do it. Just replace the values with your values and do the math. I SUGGEST you use a 1.5 volt BATTERY. You should Google this STUFF for yourself.

Discussion

20.	a man covers half of his journey at 6km/h and the remaining half at 3 km/h. the total journey time is 11 hrs. his average speed is
Answer» Average SPEED = 2xy/(x+y); = 263/(6+3); = 36/9 = 4 kmph.

Discussion

21.	A bulb of resistance 400 ohm is connected to 220 volt mains calculate the amount of current
Answer» R=400ohm v229v I=? I=v/R I = 220/400 I=11/20 A

Discussion

22.	Drive the formula for electrical power which is used only when current I and resistance R are known to us
Answer» Powder resistivity is an important PARAMETER at ELECTROSTATIC powder coating operations. For this REASON it is highly recommended to VERIFY the resistivity of powder paint and/or powder enamels regularly.

Discussion

23.	A body is moving in a circle with constant speed of 10 m/s . Circumference of the circle is 40 m . Calculate average speed and average velocity when it completes one circle
Answer» AVERAGE SPEED =total DIST covered/total time taken =40/10 =4 m/s hopefully HELPFUL..

Discussion

24.	Some examples of evaporation
Answer» Hii There!! Following are the examples of evaporation:- 1)Evaporation of water sprinkled on ground or roof top. 2)Wet clothes dry in SUN due to evaporation . 3)Hot tea GETS COOL over time due to evaporation . 4)Evaporation of water from earthen pots. Hope it helps Mark as brainliest

Discussion

25.	What are the advantages of semi conductors
Answer» SORRY i do not KNOW the ANSWER

Discussion

26.	A high flame speed is obtained in diesel engine when air fuel ratio is
Answer» When AIR fuel RATIO is about 10% which mixture then a iframe SPEED is obtained in diesel ENGINE

Discussion

27.	Define 1C of charge(Electricity)
Answer» The coulomb (symbolized C) is the STANDARD unit of electric charge. ❤The unit electric charge is the amount of charge CONTAINED in a single electron. ❤ THUS, 6.24 x 1018 ELECTRONS have 1 C of charge.....

Discussion

28.	Advantages of hybrid solar wind power generation system
Answer» HELLO this is your answer hope it HELPS

Discussion

29.	In the figure shown,angle of reflection is:
Answer» As we KNOW that angle of incidence is ALWAYS EQUAL to angle of reflection hence, 40°=40° therefore angle of reflection is 40° I.e. option 1)40°

Discussion

30.	The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and the image at a distance of 26 cm from the convex lens, calculate the new size of the image [IIT-JEE (Screening) 2003]A) 1.25 cm B) 2.5 cm C) 1.05 cm D) 2 cm
Answer» The ANSWER will be 1.05 CM

Discussion

31.	Adiabatic compression process in temp v/s volume
Answer» In the process of adiabatic compression and adiabatic expansion, there is no external HEAT, Q, get in or get out of the system. The relative change in VOLUME and pressure are the same, HOWEVER, in the expansion process, the internal energy decreaseand lower the temperature. In thecompression process, it's OPPOSITE.

Discussion

32.	A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be [MNR 1990; IIT-JEE 1985]A) 25 B) 15 C) 30 D) 50
Answer» C is the ANSWER I THINK

Discussion

33.	How does the current flow in wire
Answer» Electric current (electricity) is a flowor MOVEMENT of electrical charge. The electricity that is conducted throughcopper WIRES in your HOME consists of moving electrons. The protons and neutrons of the copper atoms do not move. ... The WIRE is "full" of atoms and free electrons and the electrons move among the atoms.

Discussion

34.	Brake pads in the system of automobiles are used to :1.reduce friction 2.increase friction 3.keep friction unchanged on applying breaks 4.increase the motion of rim of wheel
Answer» Brake pads in the SYSTEM of AUTOMOBILES are OBVIOUSLY USED to reduce friction.

Discussion

35.	A current of 1 A is flowing on the sicde of an eqilateral triangle find magnetic feild
Answer» Please use RIGHT HAND THUMB RULE

Discussion

36.	A short linear object of length llies along the axis of a concave mirror of focal length f at a distance ufrom the pole of the mirror. The size of the image is approximately equal to [IIT-JEE 1988; BHU 2003; CPMT 2004]A) l{{\left( \frac{u-f}{f} \right)}^{1/2}} B) l{{\left( \frac{u-f}{f} \right)}^{2}} C) l{{\left( \frac{f}{u-f} \right)}^{1/2}} D) l{{\left( \frac{f}{u-f} \right)}^{2}}
Answer» FULL WIDTH at half maximum (FWHM) is an expression of the extent of function given by the difference between the two extreme values of the INDEPENDENT variable at which the ..?

Discussion

37.	Q A racing car has a uniform acceleration of 5 m/s. What distance will it cover in 20 so after starting from rest.
Answer» 100M woUlf be COVERED

Discussion

38.	How can i define motion
Answer» The CHANGE in position of object with RESPECT to TIME is CALLED motion

Discussion

39.	A concave mirror of focal length 100cmis used to obtain the image of the sun which subtends an angle of 30{}^\circ .The diameter of the image of the sun will beA) 1.74cm B) 0.87cm C) 0.435cm D) 100cm
Answer» So 0.87 CM is the ANSWER

Discussion

40.	In absorption spectrum of Na the missing wavelength (s) are [BCECE 2005]A) 589 nm B) 589.6 nm C) Both D) None of these
Answer» I THINK the ANSWER is A but i am not SURE

Discussion

41.	Choose kinetic energy theory assumption.
Answer» Assumption 1 Gases consist of LARGE numbers of tiny particles that are far APART relative to their size. Assumption 2 Collisions between gas particles and between particles and container walls are elastic collisions (there is no net loss of total kinetic energy). Assumption 3 Gas particles are continuous, RAPID, random motion. They therefore possess kinetic energy, which is energy of motion. Assumption 4 There are no forces of ATTRACTION between gas particles. Assumption 5 The temperature of a gas depends on the average kinetic energy of the particles of the gas.

Discussion

42.	Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation [CPMT 1983; AFMC 2005]A) Scattering B) Diffraction C) Interference D) Polarisation
Answer» For SCATTERING he was AWARDED NOBLE PRIZE

Discussion

43.	The sky would appear red instead of blue if [DCE 2004]A) Atmospheric particles scatter blue light more than red light B) Atmospheric particles scatter all colours equally C) Atmospheric particles scatter red light more than the blue light D) The sun was much hotter
Answer» ATMOSPHERE PARTICLES scatter red light more than BLUE light

Discussion

44.	Chandu lal in nizam state temple construction
Answer» PLEASE GIVE the clear QUESTION so anyone may ANSWER you!!!

Discussion

45.	A car moving with uniform acceleration covers 450m in a 5 second interval and covers 700m in the next 5 second interval. The acceleration of the car is *
Answer» U=450 v=700 v-u/s=700-450/5=50m/s^2

Discussion

46.	White light is passed through a prism ........... colour shows minimum deviation [Orissa PMT 2004]A) Red B) Violet C) Yellow D) Green
Answer» OPTION a is CORRECT i.e. RED

Discussion

47.	Plz a nswer this question it is urgent plzzz Q2 b) part plzz it's my test tomorrow.
Answer» Use the formula MAN every time don't look for help from OTHERS SOMETIMES try yourself

Discussion

48.	Absorbance in higher wavelength indicates what
Answer» If you have read the page about how an absorption spectrometer works, you will know that it passes a whole series of wavelengths of light through a solution of a substance (the sample cell) and also through an identical container (the reference cell) which only has solvent in it.For each wavelength of light passing through the spectrometer, the intensity of the light passing through the reference cell is measured. This is usually REFERRED to as Io - that's I for Intensity. The intensity of the light passing through the sample cell is also measured for that wavelength - given the symbol, I. If I is less than Io, then obviously the sample has absorbed some of the light. A simple bit of maths is then DONE in the computer to convert this into something called the ABSORBANCE of the sample - given the symbol, A. For reasons to do with the form of the Beer-Lambert Law (below), the relationship between A (the absorbance) and the two intensities is given by: On most of the diagrams you will come across, the absorbance ranges from 0 to 1, but it can go higher than that. An absorbance of 0 at some wavelength means that no light of that particular wavelength has been absorbed. The intensities of the sample and reference beam are both the same, so the ratio Io/I is 1. LOG10 of 1 is zero. An absorbance of 1 happens when 90% of the light at that wavelength has been absorbed - which means that the intensity is 10% of what it would otherwise be.

48.

Absorbance in higher wavelength indicates what

Answer»

If you have read the page about how an absorption spectrometer works, you will know that it passes a whole series of wavelengths of light through a solution of a substance (the sample cell) and also through an identical container (the reference cell) which only has solvent in it.For each wavelength of light passing through the spectrometer, the intensity of the light passing through the reference cell is measured. This is usually REFERRED to as Io - that's I for Intensity.

The intensity of the light passing through the sample cell is also measured for that wavelength - given the symbol, I.

If I is less than Io, then obviously the sample has absorbed some of the light. A simple bit of maths is then DONE in the computer to convert this into something called the ABSORBANCE of the sample - given the symbol, A.

For reasons to do with the form of the Beer-Lambert Law (below), the relationship between A (the absorbance) and the two intensities is given by:

On most of the diagrams you will come across, the absorbance ranges from 0 to 1, but it can go higher than that.

An absorbance of 0 at some wavelength means that no light of that particular wavelength has been absorbed. The intensities of the sample and reference beam are both the same, so the ratio Io/I is 1. LOG10 of 1 is zero.

An absorbance of 1 happens when 90% of the light at that wavelength has been absorbed - which means that the intensity is 10% of what it would otherwise be.

Discussion

49.	In the given figure, what is the angle of prism [Orissa JEE 2003]A) A B) B C) C D) D
Answer» BRO where is FIGURE???

Discussion

50.	Absorption spectra of water at microwave frequencies
Answer» Water absorbs over a wide range of electromagnetic radiation with rotational transitions and intermolecular vibrations responsible for absorption in the microwave (~1 mm - 10 cm wavelength) and far-infrared (~10 µm - 1 mm), INTRAMOLECULAR vibrational transitions in the infrared (~1 µ- 10 µ) and electronic transitions occurring in the ultraviolet region (< 200 nm). The water absorption spectrum is very complex. Water's vapor spectroscopy (including microwave [3176]) has been reported [348a] and RECENTLY reviewed [348b]. The water molecule may vibrate in a number of ways. In the gas state, the vibrations [607] involve combinations of symmetric stretch (v1), asymmetric stretch (v3) and bending (v2) of the covalent bonds with absorption intensity (H216O) v1;v2;v3 = 0.07;1.47;1.00 [8]. As shown right, there is significant isotope effects with the frequencies in H2O are higher than those in D2O and T2O; the ratios between H2O, D2O, and T2O being approximately the square root of the D:H or T:H atomic mass ratios. The stretch vibrations of HDO refer to the single bond vibrations, not the combined movements of both bonds. Gas phase rotations [1701] are complex and are combined with these vibrations. The LOWEST ortho-para transitions are given elsewhere.

50.

Absorption spectra of water at microwave frequencies

Answer» Water absorbs over a wide range of electromagnetic radiation with rotational transitions and intermolecular vibrations responsible for absorption in the microwave (~1 mm - 10 cm wavelength) and far-infrared (~10 µm - 1 mm), INTRAMOLECULAR vibrational transitions in the infrared (~1 µ- 10 µ) and electronic transitions occurring in the ultraviolet region (< 200 nm).

The water absorption spectrum is very complex. Water's vapor spectroscopy (including microwave [3176]) has been reported [348a] and RECENTLY reviewed [348b]. The water molecule may vibrate in a number of ways. In the gas state, the vibrations [607] involve combinations of symmetric stretch (v1), asymmetric stretch (v3) and bending (v2) of the covalent bonds with absorption intensity (H216O) v1;v2;v3 = 0.07;1.47;1.00 [8]. As shown right, there is significant isotope effects with the frequencies in H2O are higher than those in D2O and T2O; the ratios between H2O, D2O, and T2O being approximately the square root of the D:H or T:H atomic mass ratios. The stretch vibrations of HDO refer to the single bond vibrations, not the combined movements of both bonds. Gas phase rotations [1701] are complex and are combined with these vibrations. The LOWEST ortho-para transitions are given elsewhere.

Discussion

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Any product show energy =100 kcal what ths means

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Why lightning occurs first then thundering. ?

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A moving coil instrument gives a full scale deflection of 20mA when potential difference across its terminal is 200mV. Calculate (i) the shunt resistance for measuring current up to 20A (ii) the series resistance for measuring voltage up to 400V.

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A bulb of resistance 400 ohm is connected to 220 volt mains calculate the amount of current

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A body is moving in a circle with constant speed of 10 m/s . Circumference of the circle is 40 m . Calculate average speed and average velocity when it completes one circle

Some examples of evaporation

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Define 1C of charge(Electricity)

Advantages of hybrid solar wind power generation system

In the figure shown,angle of reflection is:

Adiabatic compression process in temp v/s volume

A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be [MNR 1990; IIT-JEE 1985]A) 25 B) 15 C) 30 D) 50

How does the current flow in wire

Brake pads in the system of automobiles are used to :1.reduce friction 2.increase friction 3.keep friction unchanged on applying breaks 4.increase the motion of rim of wheel

A current of 1 A is flowing on the sicde of an eqilateral triangle find magnetic feild

Q A racing car has a uniform acceleration of 5 m/s. What distance will it cover in 20 so after starting from rest.

How can i define motion

A concave mirror of focal length 100cmis used to obtain the image of the sun which subtends an angle of 30{}^\circ .The diameter of the image of the sun will beA) 1.74cm B) 0.87cm C) 0.435cm D) 100cm

In absorption spectrum of Na the missing wavelength (s) are [BCECE 2005]A) 589 nm B) 589.6 nm C) Both D) None of these

Choose kinetic energy theory assumption.

Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation [CPMT 1983; AFMC 2005]A) Scattering B) Diffraction C) Interference D) Polarisation

The sky would appear red instead of blue if [DCE 2004]A) Atmospheric particles scatter blue light more than red light B) Atmospheric particles scatter all colours equally C) Atmospheric particles scatter red light more than the blue light D) The sun was much hotter

Chandu lal in nizam state temple construction

A car moving with uniform acceleration covers 450m in a 5 second interval and covers 700m in the next 5 second interval. The acceleration of the car is *

White light is passed through a prism ........... colour shows minimum deviation [Orissa PMT 2004]A) Red B) Violet C) Yellow D) Green

Plz a nswer this question it is urgent plzzz Q2 b) part plzz it's my test tomorrow.

Absorbance in higher wavelength indicates what

In the given figure, what is the angle of prism [Orissa JEE 2003]A) A B) B C) C D) D

Absorption spectra of water at microwave frequencies