685 + Interview Questions in Physics in Class 6 Page 5 InterviewSolution

201.	Large deposits of magnetite were found in Asia Minor in a distric called ________
Answer» ANSWER :MAGNESIA

Discussion

202.	A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank.If the river is flowing at a speed of 3 kmph,and the width of the river is 2km, the time taken to cross the river is (in hours)
Answer» SOLUTION :The river flowing east is due to the diamagnetic SUBSTANCE of water. So, it ALWAYS turns perpendicular to the magnetic field of the EARTH's magnetic field. The above-mentioned reason is one of the FACTORS in which the direction of the flow of water depends.

Discussion

203.	What happens if the material used to makethe armature of an electric bell is charged to steel ?
Answer» There will not be any change in the ringing of the bell. Loudness of the bell ring gradually REDUCES. Loudness of the bell ring gradually increases. The hammer hits the gong for once and is likely to stop. Solution :The armature of an electrical bell is generally made of SOFT iron because in an electric bell the armature needs to hit the gong several times as long as the push type switch is in ON condition. This can be achieved if the armature is made of materialwhich has less magneti RETENTIVE PROPERTY ( i.e., the material BEHAVES likemagnet only when the currentpasses through the insulated wire which is wound around it ). Due to this temporary magnetism, the hammer hits the gong several times and this is how the bell rings in case of an electric bell. If the armature is made of steel, it exhibits permanent magnetism. Therefore, the hammer hits the gong one and remains in the same position. Hence, the correct option is (d).

Discussion

204.	Choose an example from the following where action and reaction pair exists
Answer» A book placed on a table. A person walking on the road. A 1 KG mass suspended to a SPRING balance. All the above Answer :D

Discussion

205.	What is the principle used in wheel and axle? Mention its applications.
Answer» Screw driver Tap Screw Door knobs Solution : To understand this imagine cutting a paper diagonally and mark the INCLINED edge with a SKETCH and roll it overa pencil. It looks like a THREADED screw. Similary ghat ROADS are made cuved along the height of the HILL. Hence ghat roads can be compared to inclined plane.

Discussion

206.	The gases which cause acid rain are ______ and _______.
Answer» SOLUTION :The GASES which CAUSE ACID rain are`(SO_(2))and (NO_(2))`.

Discussion

207.	Select the correct alternative from the given options .The fuel used in cement factories , steelmillsandglass factories is ________.
Answer» LPG Wood COAL CNG Solution :Coal is cement factories ,steel MILLS and GLASS factories.

Discussion

208.	Biceps, triceps, diaphragm, knee cap.
Answer» Solution :KNEE CAP: It is a bone, all OTHERS are MUSCLES.

Discussion

209.	Match the following. {:(,"Column A",,,"Column B"),((A),"Area/length","()",(a),"metre"^(-1)),((B),"Mass/volume","()",(b),"No unit"),((C),"Length/area","()",(c),"metre"),((D),"Length"^(2)"/area","()",(d),"kg m"^(-3)):}
Answer» ANSWER :A `RARR` C, B `rarr` d, C `rarr` a, D `rarr` b

Discussion

210.	Does a situation exist where two force act on abody without affecting it ? Explain with an example .
Answer» SOLUTION : Yes, it is POSSIBLE whent WO equal forces act in the opposite direction,i .e., NET force aeting on the body is ZERO

Discussion

211.	What are consequential forces ? Give any one examples .
Answer» Solution :The consequential force can be defined as a force which is called into play, when a force is applied on an object. Examples: ( a) When a CRICKET BALL is made to roll on the ground byapplying force, it stops after COVERING a certaindistance, although, no force is applied to stop it. It is because the force of fr iction which is called consequential force. ( b) When we STRETCH a SPRING or a rubber band by applying force, the consequential force of tension acts on it.

Discussion

212.	Angle of incidence means _____.
Answer» SOLUTION :Angle made by the INCIDENT RAY with the NORMAL

Discussion

213.	Select the correct alternative from the given options .The products of combustion of glucose are
Answer» WATER vapour , CARBON DIOXIDE Water vapor , hydrogen Hydrogen , carbon MONOXIDE Carbon monoxide , carbon dioxide Solution :The products of combustion of glucose are water vapour and carbon dioxide.

Discussion

214.	The composition of air in terms of percentage of its varous components is given.(a)Identify X and Y.(b)Mention any two uses of X and Y .(c ) identify the gases present in Z.
Answer» Solution :(a)X is nitrogen ANDY is oxygen. (b)(i)Nitrogen DILUTES the activity of oxygen. (ii) Nitrogen is essential for the growth of plants. (iii) Oxygen is essential for respiration. (iv) Oxygen support COMBUSTION. (c )Z CONTAINS CARBON dioxide , argon , helium , water vapour.

Discussion

215.	Find the area ofa table of length 1.5 mand breadth 20 cm.
Answer» ANSWER :`3000 "CM"^2` or 0.3 `m^2`

Discussion

216.	Whatis meant by magnetizing a material and how does this happen ?
Answer» Solution :A magnetic substance CONSISTS of MANY dipoles oriented in different DIRECTIONS. These dipoles, while getting magnetized, slowly orientin the direction of the magnetic FIELD APPLIED and this process is called magnetization.

Discussion

217.	A wires used in electrical circuits should be covered with _____ .
Answer» CONDUCTING material Insulating material Metal Semi-conductor Answer :B

Discussion

218.	Explain how it is possible to separate gold from river sand.
Answer» Solution :Separation of GOLD from river sand can be carried out by ALLOWING the sand to a SWIFT stream of water. Sand particles being heavier and corse settle down while the fine LIGHTER gold particles float.

Discussion

219.	Define physical quantity and give any two examples.
Answer» Solution :QUANTITY which can be MEASURED is called PHYSICAL quantity. Example: TIME, speed.

Discussion

220.	Assertion:A plane mirror can form a real and inverted image. Reason : A virtual image is always formed behing the plane mirror.
Answer» A and R are true and R is the correct explanation of A. A and R are true but R is not the correct explanation of A. A is FALSE and R is true. A is true and R is false Solution :A is INCORRECT and R is correct. Hence, the correct OPTION is (c)

Discussion

221.	In which of the circuits given below above does the bulbs glow brighter ? (Assume that all bulbs and cells are identical )
Answer» CIRCUIT 'a' Circuit'b' Circuit 'c' Circuit 'd' Solution :Circuit A HENCE, the CORRECT OPTION is (a)

Discussion

222.	Identify the most abundant class of elements.
Answer» METALS Non-metals Metalloids Inert gases Solution :Metals are the most abundant class of ELEMENTS HENCE, the CORRECT option is (a).

Discussion

223.	Rechargeable cell/cells among them is/are _____.
Answer» DRY cell Secondary cell Primary cell Both (a) and (C) ANSWER :B

Discussion

224.	The direction of motion of a tree appears to be "______" ' when a passenger observes it from a moving train .
Answer» SOLUTION :OPPOSITE to the DIRECTION of TRAIN

Discussion

225.	Why do earthworms come out of soil in rainy season?
Answer» Solution :Earthworms live INSIDE the SOIL and get OXYGEN required for respiration respiration from the AIR trapped in the gaps between the soil particles . Inrainy season , all the spaces in soil get filled by rainwater . Hence , the rarthworms COME out of the soil to get air for respiration.

Discussion

226.	{:("Across",\|,"Down"),(1."Pulley whose axis of rotation is not fixed (2 Words)",\|,1."Greater the _____ the smaler the effort required to overcome a certain load. (2 Words)"),(4."This is a second-order lever used for a fruit cutter",\|,2."Inclined plane wound around"),(7."Greater the number of pullcys, _____ is the force needed to lift heavy loads".,\|,3."Block and tackle means more number of ____"),(10."Scissors are an example of ____ (3 Words)",\|,"5. This simple machine changes the direction of applied force"),(,\|,6."This simple machine changes the direction of applied force"),(,\|,8."Leading edege shape of a speed boat"),(,\|,9."Tap works on the principle of_____):}
Answer» Solution :`{:("Across",\|,"Down"),(1."Movable pulley",\|,1."MECHANICAL advantage"),(4."Mango cutter",\|,2."SCREW"),(7."Lesser",\|,3."Pulleys"),(10."First order lever",\|,5."Pulley"),(,\|,6."Crowbar"),(,\|,8."Wedge"),(,\|,9."Screw"):}`

Discussion

227.	Skeleton : Supports :: …………… : Connects
Answer» Solution :SKELETON : UPPER arm :: FEMUR : Thigh

Discussion

228.	Which of the following acts on a body from a very .far distance?
Answer» ELECTRIC force Magnetic force Gravitational force Frictional force Answer :A:B:C

Discussion

229.	What is meant by boiling point?
Answer» Solution :Boiling POINT is the TEMPERATURE at which a liquid starts changing into its GASEOUS state.

Discussion

230.	Static friction is a "______ " force.
Answer» ANSWER :Self-adjusting

Discussion

231.	An ice cube floats on water. What conclusion can you draw on the basis of this observation?
Answer» Solution :Through ICE is the shloid FORM of water, it has LESSER density than water which is its liquid form . As a RESULT ,ice floats on water.

Discussion

232.	How can you say that speed and velocity are different even through their units are the same?
Answer» SOLUTION :VELOCITY has DIRECTION but SPEED doesnot have any direction, THEREFORE, they are different from each other.

Discussion

233.	Find the mechanical advantage of the below figure:
Answer» SOLUTION : `MA=(L)/(E)=(2E)/(E)=2`

Discussion

234.	Although, mechanical advantage is less than 1 for class-three levers, we still use them. Give reason.
Answer» Solution :Although, mechanical advantage is less than 1 for calss-three levers, we STILL use them because the distance moved by the effort. For example, when a BALL is HIT with a BAT, the ball ends up GOING faster than the speed with which the bat was swung. Therefore, class-three levers are called speed multipliers.

Discussion

235.	Define mechanical advantage.
Answer» Solution : The ability of a simple MACHINE to multiply the EFFORT applied on it is called its MECHANICAL ADVANTAGE.

Discussion

236.	Give the characteristics of image formed by a plane mirror.
Answer» Solution :CHARACTERISTICS of an image FORMED by a plane mirror : (i) Image formed is virtual and ERECT in nature. (ii) Object distance always equals to the image distance . (iii) For a real object, the image formed is virtual and vice VERSA. (iv) Image shows LATERAL inversion.

Discussion

237.	Match the following.{:("Column A",,"Column B",),("(A)Nitrogen",(),"(a) soft drink",),("(B) Oxygen ",(),"(b)Growth of plants",),("(C ) Carbon dioxide",(),"(c)Snow , fog , mist",),("(D) Argon",(),"(d) Combustion",),("(E)Water vapour",(),"(e)Electric bulbs",):}
Answer» SOLUTION :`(A)to(B),(B)to(d), ( C) to(a),(b), (D)to(E),(E)to(c ),(b)`

Discussion

238.	Mention the effect of electric current with which the following electrical appliances works. Electric bell, Iron (box) , Hair dyer and Bulb
Answer» Electric bell-Magnetic EFFECT, Iron box-Heating effect, HAIR dyer-Heating effect, BULB-Heating effect. Electric bell-magnetic effect, Iron box-Heating effect, Hair dryer-Heating effect, Bulb -lighting effect Electric bulb-Magnetic effect, Iron box-magnetic, Hair dryer-Heating effect, Bulb -heating effect Electric bell-Heating ,Iron box-Heating effect, hair dryer -Heating effect, Bulb-Heating effect. Solution :Hence , the correct OPTION is (a)

Discussion

239.	If A, B and C are the units of time, length and speed, then find the relationship between them.
Answer» Solution :SPEED = `("Length")/("Time")` `C = (B)/(A)` or B = CA

Discussion

240.	Distinguish between elements and compounds.
Answer» SOLUTION :

Discussion

241.	The thermometer used to measure the minimum and maximum temperatures of a day is called _____ thermometer.
Answer» ANSWER :SIX's MAXIMUM and MINIMUM

Discussion

242.	Laws of reflection are applicable for _______.
Answer» ANSWER :All KIND of REFLECTING SURFACES

Discussion

243.	The place where two bones meet is called………..
Answer» ANSWER :JOINT

Discussion

244.	Match the following.
Answer» SOLUTION :(A) `rarr` (B) `rarr` (V), (C) `rarr` (D) `RAR` (Vi),(E) `rarr` (iii), (F) `rarr` (II).

Discussion

245.	If a body does not change its position, it must be in a state of ____.
Answer» ANSWER :REST

Discussion

246.	Name the following symbols :
Answer» SOLUTION :(a) Electromagnet (B) Switch(c) Cell (d) BATTERY(e) Button CELLS (f) Wind mills

Discussion

247.	Is vapour and gas same? Why?
Answer» Solution :A GAS has one defined state at ROOM temperature WHEREAS a vapour is a substance that is in gaseous as well as liquid state at room temperature.

Discussion

248.	Prove that 'Aircontains dustand smoke' .
Answer» Solution :Close all the doors and windown with curtains PULLED down to MAKE the DARK . Now open the DOOR or awindow facing the sun , just a LITTLE, in such a way that it window facingthe sun , just a little, in such a way that it allows sunlight to enther the room only through a slit . we seesome tinyshining particles moving in the beam of sunlight .Thisshows that air also contains dust particles.

Discussion

249.	Give example of substances which undergo sublimation.
Answer» Solution :Camphor, maphthalene, AMMONIUM CHLORIDE, IODINE, and DRY ice are some substances which undergo sublimation.

Discussion

250.	Find the unit of ratio of mass to area.
Answer» SOLUTION :`("MASS")/("AREA") = (KG)/(m^(2)) = kg m^(-2)`

Discussion

Explore topic-wise InterviewSolutions in .

Large deposits of magnetite were found in Asia Minor in a distric called ________

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank.If the river is flowing at a speed of 3 kmph,and the width of the river is 2km, the time taken to cross the river is (in hours)

What happens if the material used to makethe armature of an electric bell is charged to steel ?

Choose an example from the following where action and reaction pair exists

What is the principle used in wheel and axle? Mention its applications.

The gases which cause acid rain are ______ and _______.

Select the correct alternative from the given options .The fuel used in cement factories , steelmillsandglass factories is ________.

Biceps, triceps, diaphragm, knee cap.

Match the following. {:(,"Column A",,,"Column B"),((A),"Area/length","()",(a),"metre"^(-1)),((B),"Mass/volume","()",(b),"No unit"),((C),"Length/area","()",(c),"metre"),((D),"Length"^(2)"/area","()",(d),"kg m"^(-3)):}

Does a situation exist where two force act on abody without affecting it ? Explain with an example .

What are consequential forces ? Give any one examples .

Angle of incidence means _____.

Select the correct alternative from the given options .The products of combustion of glucose are

The composition of air in terms of percentage of its varous components is given.(a)Identify X and Y.(b)Mention any two uses of X and Y .(c ) identify the gases present in Z.

Find the area ofa table of length 1.5 mand breadth 20 cm.

Whatis meant by magnetizing a material and how does this happen ?

A wires used in electrical circuits should be covered with _____ .

Explain how it is possible to separate gold from river sand.

Define physical quantity and give any two examples.

Assertion:A plane mirror can form a real and inverted image. Reason : A virtual image is always formed behing the plane mirror.

In which of the circuits given below above does the bulbs glow brighter ? (Assume that all bulbs and cells are identical )

Identify the most abundant class of elements.

Rechargeable cell/cells among them is/are _____.

The direction of motion of a tree appears to be "______" ' when a passenger observes it from a moving train .

Why do earthworms come out of soil in rainy season?

Skeleton : Supports :: …………… : Connects

Which of the following acts on a body from a very .far distance?

What is meant by boiling point?

Static friction is a "______ " force.

An ice cube floats on water. What conclusion can you draw on the basis of this observation?

How can you say that speed and velocity are different even through their units are the same?

Find the mechanical advantage of the below figure:

Although, mechanical advantage is less than 1 for class-three levers, we still use them. Give reason.

Define mechanical advantage.

Give the characteristics of image formed by a plane mirror.

Match the following.{:("Column A",,"Column B",),("(A)Nitrogen",(),"(a) soft drink",),("(B) Oxygen ",(),"(b)Growth of plants",),("(C ) Carbon dioxide",(),"(c)Snow , fog , mist",),("(D) Argon",(),"(d) Combustion",),("(E)Water vapour",(),"(e)Electric bulbs",):}

Mention the effect of electric current with which the following electrical appliances works. Electric bell, Iron (box) , Hair dyer and Bulb

If A, B and C are the units of time, length and speed, then find the relationship between them.

Distinguish between elements and compounds.

The thermometer used to measure the minimum and maximum temperatures of a day is called _____ thermometer.

Laws of reflection are applicable for _______.

The place where two bones meet is called………..

Match the following.

If a body does not change its position, it must be in a state of ____.

Name the following symbols :

Is vapour and gas same? Why?

Prove that 'Aircontains dustand smoke' .

Give example of substances which undergo sublimation.

Find the unit of ratio of mass to area.

The gases which cause acid rain are and _.