685 + Interview Questions in Physics in Class 6 Page 8 InterviewSolution

351.	What is meant by lateral inversion ?
Answer» SOLUTION :The right side of the object appears to be the left side of its IMAGE and vice-versa and this phenomenon is called LATERAL inversion.

Discussion

352.	What is lateral inversion ?
Answer» SOLUTION :LATERAL INVERSION: The apparent reversal of the left and RIGHT of the IMAGE compared with the object.

Discussion

353.	The current supplied to our home is ______.
Answer» Alternating CURRENTS (AC) DIRECT CURRENT (DC) AC and DC Only DC Answer :A

Discussion

354.	Which of these is not a unit of force?
Answer» KILOGRAM force Newton Gram weight None of these Answer :D

Discussion

355.	According to the Law of Conservation of Energy , as energy changes from one form to another form , the total energy of that system
Answer» KEEPS INCREASING Keeps decreasing Increases for some time then REMAINS constant . NONE of these Answer :D

Discussion

356.	Common salt can be separated from the sea water by the method of ___
Answer» SOLUTION :Common SALT can be separated from the sea WATER by the METHOD of evaporation.

Discussion

357.	Choose the incorrect one from the following .
Answer» Periscope forms a REAL image for a real object. Periscope form a virtual image for a real object Object distance equals to image distance for a plane MIRROR Both (B) and (C) SOLUTION :Periscope forms virtual image of virtual object

Discussion

358.	Femur, humerus, tibia, fibula.
Answer» SOLUTION :HUMERUS: It is the BONE present in hand, all OTHERS are present in leg.

Discussion

359.	What is the difference between magnetic and non-magnetic material ? Give examples.
Answer» Solution :The materials which get ATTRACTED towards a magnet are magnetic materials. For example - IRON, cobalt ATC. Material which are not attracted towardsa magnet are non- magnetic materials. For example-plastic,GLASS , ETC.

Discussion

360.	You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture.
Answer» Solution :Oil being immiscible and LESS dense than water will FLOAT on top, so it can be easily REMOVED by scooping it out from water. Sand will SINK at the bottom, Salt will dissovle in water, so filter this solution thereby separating the sand PARTICLES then let the water evaporate to reclain the salt.

Discussion

361.	A plane mirror forms _____ image.
Answer» ANSWER :A VIRTUAL

Discussion

362.	CFL stands for
Answer» Commonfluorescent LIGHT COMPACT FLUORESCENT light Compact fluoresecent lamp Common fluorescent lamp Answer :C

Discussion

363.	Pressure is directly proportional to
Answer» FORCE Thrust Area Velocity Solution :Pressure increases with increase in FORECE , therefore pressure directiy proportinal to the force ACTIONG on UNIT area.

Discussion

364.	Different sized pearls are separated by jewellers by the process of ______ .
Answer» Solution :Different SIZED PEARLS are SEPARATED by sieving method.

Discussion

365.	"_______" sources of energy can be replenished with the passage of time .
Answer» ANSWER :RENEWABLE

Discussion

366.	A boy playing in sand with a magnet notices some dust or particles attracted to magnet. What does this imply ?
Answer» Solution :Those PARTICLES which are attracted to the magnet are SMALL pieces or POWDER iron or any othermagnetic substance. This happens when a magnet ATTRACTS MAGNETIC substance.

Discussion

367.	The active component of air is __________.
Answer» Solution :The ACTIVE COMPONENT of air is `UNDERLINE( "OXYGEN").`

Discussion

368.	v0_newFlow
Answer» Solution : `L_(H)=L_(V)=L` `L_(H)=1,L_(V)=1+0.51=1.51` `h_(H)=h_(V)=H` `(L)/(E)=(l)/(h)` `E=(Lxxh)/(l)` `(E_(H))/(E_(V))=(L_(H))/(L_(V))XX(h_(H))/(h_(V))xx(l_(V))/(l_(H))` `=(L)/(L)xx(h)/(h)xx(1.5l)/(l)` `:.(E_(H))/(E_(V))=(3)/(2)`

Discussion

369.	{:("Across",\|,"Down"),("5. Material that is used for making temporary magnets",\|,"1. Man-made magnets"),("6. Freely suspended bar magnet takes rest in north-south direction due to",\|,"2. One of the method of magnetization"),("8. Town in which magnetism is discovered",\|,"3. Imaginary line perpendicular to magnetic axis andpassing through its centre"),("10. Magnet that retain magnetism for long time",\|,"4. Distance between two poles of a bar magnet"),(,\|,"7. These poles attract each other"),(,\|,"9. The point at which maximum magnetic property is concentrated"):}
Answer» Answer :`{:("ACROSS",\|,"Down"),("5. Soft Iron ",\|,"1. Artificial magnets"),("6. Directive property",\|,"2. Single touch"),("8. Manesia",\|,"3. Manetic equator"),("10. Permanent",\|,"4. EFFECTIVE length"),(,\|,"7. Unlike "),(,\|,"9. Pole"):}`

Discussion

370.	Draw the ray diagram of a plane mirror that shows the image formation by an extended real object.
Answer» SOLUTION :

Discussion

371.	One unit means ________
Answer» 10 Wh 1 kWh 10 W 10 MWh Answer :B

Discussion

372.	In _____ system there are seven fundamental quantities.
Answer» ANSWER :SI

Discussion

373.	_______ is a transparent heterogeneous medium.
Answer» ANSWER :AIR

Discussion

374.	Which among the following is a soft solid and has high melting point?
Answer» DIAMOND Sodium Chlorine Sulphur Solution :Sodium is a metal, and hence has HIGH melting point. But, it is a soft SOLID UNLIKE other METALS which are hard.

Discussion

375.	Knee joint is the ball and socket joint.
Answer» SOLUTION :FALSE: KNEE JOINT is HINGE joint.

Discussion

376.	A cockroach is flying towards a plane mirror in perpendicular direction with a velocity of 4 mm s^(1) . Find the speed of its image in the mirror and also find out the angle of incidence , angle of reflection and angle of deviation.
Answer» Solution :`V_(C)=4 "MM" s^(-1)` Speed of the image of COCKROACH is equal to the spped of cockroach. Image speed =4` mm s^(1)` As its is approcahing the MIRROR perpendicularly , its angle of incidence=angle of reflection =ZERO Angle of deviation `=180-2i` `""=180-0` `""=180^(@)`

Discussion

377.	Match the following.{:(,"Column A",,,"Column B"),((A),"Kelvin","()",(a),"Hotness"),((B),"Time","()",(b),"Temperature"),((C),"Temperature","()",(c),"Second"):}
Answer» SOLUTION :A `RARR` B, B `rarr` C, C `rarr` a

Discussion

378.	What conclustions can be draw based on thefollowing diagrams ?
Answer» Solution :(a) Air occupies space . (B)ONE FIFTH of air contains oxygen , oxygen supporst BURING. (c ) Air contains water vapour.

Discussion

379.	Clear water, Fog, Clear plastic, Air
Answer» SOLUTION : TRANSPARENT MATERIALS

Discussion

380.	Define displacement.
Answer» SOLUTION :The shortest DISTANCE between the initial and final positions of a BODY is CALLED displacement.

Discussion

381.	Identify the conversion associated with decrease in intermolecular forces of attraction.
Answer» Steam-Water Water-Ice Dry ice-Carbon DIOXIDE None of these Solution :Dry ice is solid carbondioxide. It sublimes to GASEOUS state. This CONVERSION is ASSOCIATED with decrease in intermolecular forces of attraction. Hence, the CORRECT option is (c).

Discussion

382.	What is the SI unit of the ratio of mass to area?
Answer» SOLUTION :`("MASS")/("AREA")=(KG)/(m^(2))=kg m^(-2)`

Discussion

383.	A crowbar is of 150 cm length. Its fulcrum is at a distance of 50 cm from the load. Find out the mechanical advantage.
Answer» Solution :LOAD ARM =50 cm EFFORT arm 150-50cm =100 cm MA= LENGTH of effort arm/length of load arm `:.MA=100//50=2`

Discussion

384.	Mega is used for a factor of _____.
Answer» ANSWER :`10^(6)`

Discussion

385.	Two solid cylinders A and B of the same mass are rolling on a give surface .If radius of B is double than of A, then compare the rolling friction acting for them.
Answer» Solution :As radius of B is GREATER than that of A , its AREA is also graater than of A. So, rolling friction is also more for CYLINDER B.

Discussion

386.	An object 'X' of volume 200 cm^(3) and another object Y of volume 250 cm^(3) are taken. If their area is the same, then determine the ratio of their heights.
Answer» Solution :They both have EQUAL AREA. Volume = Area `xx` HEIGHT `(h_(x))/(h_("y")) = (V_(x))/(V_("y"))= (200)/(250) = (4)/(5)`

Discussion

387.	Define the following terms. (a) Magnetic poles (b) Magnetic North Pole ( c) Magnetic South Pole (d) Magnetic axis ( e) Length of a bar magnet (f) Effective length of a bar magnet (g) Magnetic equator
Answer» Solution :(i) Magnetic poles: The end points of a magnet where most of its magnetic power is concentrated are CALLED pole of a magnet . (ii) Magnetic NORTH Pole : The point N at the end of the FREELY suspended bar magnet which points towards the geographic North Pole is called magneticNorth Pole. (iii) Magnetic South Pole : The piontS at the end of the freely suspendedbar magnet which points towards the geographic South Pole is called magnetic South pole. (iv) Magnetic AXIS : An imaginary line PASSING through the magnetic North Pole and South Pole of a bar magnet is called magnetic axis. (v) Length of a bar magnet : Total distance from the North Pole to the centre of a magnet or the South Pole to the centre of a magnet is called length of a magnet. (vi) Effective length: The shortest lenght between teh magnetic North Pole and the magnetic South Pole of a magnet is called effective length of the magnet.ltrbgt (vii) Magnetic equator: An imaginary line passing through the centre of the magnet and perpendicular to the magnetic axis is called mangetic equator.

Discussion

388.	The mountaineers carry oxygen gas cylinders with them while climbing high mountains . Give reasons.
Answer» SOLUTION :With the increase in height , the percentage of oxygen decreases . HENCE , BREATHING BECOMES DIFFICULT and to facilitate breathing mountaineers carry oxygen gas cylinders with them.

Discussion

389.	Find the ratio of the load arm to that of the effort arm of a second-order lever if its mechanical advantage is 5.
Answer» SOLUTION : `MA=("EFFORT ARM")/("Load arm")=1` `:.("Load arm")/("Effort arm")=(1)/(5)`

Discussion

390.	Define rest and motion.
Answer» Solution : body is said to be at resti F it does not change its position with respect to its IMMEDIATE fixed SUR- roundings with the PASSAGE of time.A body is said to be in MOTION ifit changes its posi- tion with respect to immediate fixed surroundings with the passage of time

Discussion

391.	Anode means ______.
Answer» POSITIVE electrode Negative electrode Cathode Electrolyte Answer :A

Discussion

392.	The filament of an electric bulb is made of tungsten.
Answer» ANSWER :TUNGSTEN

Discussion

393.	Fill in balanks.The products of combustion of fossilfuels are ___________ and __________.
Answer» SOLUTION : The PRODUCTS of combustion of fossilfuels are`underline( " CARBON dioxide")and underline("water vapour.")`

Discussion

394.	When an empty spray pump is taken and air is blown on a clean mirror , the mirror remains clean. If we gently blow out air form lungus on the same mirror , the mirrormisty . Give reason.
Answer» SOLUTION :Exhaled AIR contains greater amount of water vapour than the normal air . Whenthisair comes in contact with surface of the mirror , it condenses to form tiny water DROPLETS and GIVES the appearanceof mist . As a result , the mirror surface turns MISTY

Discussion

395.	If the effort arm of a lever is twice of its load arm, it is a ____.
Answer» First-ORDER lever Second-order lever Third-order lever 1 or 2 Solution : In case of III order always THELOAD arm will be greater then the EFFORT arm.

Discussion

396.	Arrange the following components in a circuit diagram such that the bulb glows. (a) Cell 1(b) Cell B(c) Bulb(d) Switch
Answer» SOLUTION :

Discussion

397.	One atm ="________".
Answer» ANSWER :`10^5 PA`

Discussion

398.	What are fundamental and derived units? Give some examples.
Answer» Solution :Units of fundamental QUANTITIES are called fundamental units. EXAMPLE: GRAM, metre

Discussion

399.	The size of image obtained by pinhole camera depends on______ of camera.
Answer» ANSWER :SIZE of the HOLE

Discussion

400.	2 decades are equal to _____ years.
Answer» ANSWER :20

Discussion

Explore topic-wise InterviewSolutions in .

What is meant by lateral inversion ?

What is lateral inversion ?

The current supplied to our home is ______.

Which of these is not a unit of force?

According to the Law of Conservation of Energy , as energy changes from one form to another form , the total energy of that system

Common salt can be separated from the sea water by the method of ___

Choose the incorrect one from the following .

Femur, humerus, tibia, fibula.

What is the difference between magnetic and non-magnetic material ? Give examples.

You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture.

A plane mirror forms _____ image.

CFL stands for

Pressure is directly proportional to

Different sized pearls are separated by jewellers by the process of ______ .

"_______" sources of energy can be replenished with the passage of time .

A boy playing in sand with a magnet notices some dust or particles attracted to magnet. What does this imply ?

The active component of air is __________.

v0_newFlow

Draw the ray diagram of a plane mirror that shows the image formation by an extended real object.

One unit means ________

In _____ system there are seven fundamental quantities.

_______ is a transparent heterogeneous medium.

Which among the following is a soft solid and has high melting point?

Knee joint is the ball and socket joint.

A cockroach is flying towards a plane mirror in perpendicular direction with a velocity of 4 mm s^(1) . Find the speed of its image in the mirror and also find out the angle of incidence , angle of reflection and angle of deviation.

Match the following.{:(,"Column A",,,"Column B"),((A),"Kelvin","()",(a),"Hotness"),((B),"Time","()",(b),"Temperature"),((C),"Temperature","()",(c),"Second"):}

What conclustions can be draw based on thefollowing diagrams ?

Clear water, Fog, Clear plastic, Air

Define displacement.

Identify the conversion associated with decrease in intermolecular forces of attraction.

What is the SI unit of the ratio of mass to area?

A crowbar is of 150 cm length. Its fulcrum is at a distance of 50 cm from the load. Find out the mechanical advantage.

Mega is used for a factor of _____.

Two solid cylinders A and B of the same mass are rolling on a give surface .If radius of B is double than of A, then compare the rolling friction acting for them.

An object 'X' of volume 200 cm^(3) and another object Y of volume 250 cm^(3) are taken. If their area is the same, then determine the ratio of their heights.

Define the following terms. (a) Magnetic poles (b) Magnetic North Pole ( c) Magnetic South Pole (d) Magnetic axis ( e) Length of a bar magnet (f) Effective length of a bar magnet (g) Magnetic equator

The mountaineers carry oxygen gas cylinders with them while climbing high mountains . Give reasons.

Find the ratio of the load arm to that of the effort arm of a second-order lever if its mechanical advantage is 5.

Define rest and motion.

Anode means ______.

The filament of an electric bulb is made of tungsten.

Fill in balanks.The products of combustion of fossilfuels are ___________ and __________.

When an empty spray pump is taken and air is blown on a clean mirror , the mirror remains clean. If we gently blow out air form lungus on the same mirror , the mirrormisty . Give reason.

If the effort arm of a lever is twice of its load arm, it is a ____.

Arrange the following components in a circuit diagram such that the bulb glows. (a) Cell 1(b) Cell B(c) Bulb(d) Switch

One atm ="________".

What are fundamental and derived units? Give some examples.

The size of image obtained by pinhole camera depends on______ of camera.

2 decades are equal to _____ years.

Fill in balanks.The products of combustion of fossilfuels are _ and .