685 + Interview Questions in Physics in Class 6 Page 3 InterviewSolution

101.	The contituents present in the gases are responsible for acid rains are ____________ and _____________.
Answer» CARBON , SULPHUR and oxygen sulphur , NITROGEN and oxygen carbon , fluorene and chlorine chlorine , fluorrnr and oxygen Solution :`SO_(2)and NO_(2)`gases dissolvein RAIN water and result in acid rains.

Discussion

102.	Namethe component of air which extinguishes fire . Givereasons.
Answer» Solution :Carbon dioxide is used to extinguish fire `CO_(2)` is a NON- supporter of combustion and non - combustible GAS . Moreover , it is heavier than air and cuts off the contact between air and fire , and HENCE , it can be used to PUT off the fires.

Discussion

103.	Divyansh sat on a tree at a height of 2 metres . If he weighs 200 newtons , then what is the energy possessed by him in that situation.
Answer» ANSWER :400 J

Discussion

104.	Distinguish between skeleton and joint.
Answer» Solution :The rigid supporting FRAMEWORK of an organism which supports the soft tissue is known as SKELETON. The place or a point where two bones connect each other is called joint. The joint is the place of ARTICULATION which helps the BODY parts to provide MOVEMENT.

Discussion

105.	Classify the objects as opaque transparent and translucent : Fog, glass, wood, plastic box, smoke, water
Answer» SOLUTION :Transparent -GLASS and WATER. Opaque -wood and plastic box Translucent -fog and SMOKE

Discussion

106.	Define the gravitational untis of force and relate them.
Answer» Solution :GRAM force is equal to the force on a mass of one gram in a STANDARD GRAVITATIONAL field. Kilogram force is equal to the force on a mass of one kilogram in a standard gravitational field. 1 gf= 980 DYNE = `980xx10^-5N = 9.8xx10^-3N` 1gf=`10^-3 kgf`

Discussion

107.	A body is said to be in a state of motion if it changes its _____.
Answer» ANSWER :POSITION with RESPECT to TIME

Discussion

108.	Electric force exists between
Answer» TWO masses Two magnets Two electrons Two bodies Answer :C

Discussion

109.	Choose the incorrect one from the following.
Answer» ELECTRICAL FORCES can be attractive (or) repulsive in nature and are short range forces Gravitational forces are attractive in nature and they are LONG range forces Magnetic lines of force cannot exist with a single magnetic pole. The ENERGY of flowing water is used to produce necessary force which runs a generator to produce electric current Answer :A

Discussion

110.	Which animal has backbone and ribs interconnected with each other ?
Answer» Fish Snail Cockroach Snake Solution :SNAKES are ANIMALS that have backbone and ribs INTERCONNECTED with each other. Hence, the correct OPTION is (d).

Discussion

111.	If the slope of an inclined plane is steeper, the effort required to push a load through it is _____.
Answer» ANSWER :GREATER

Discussion

112.	For a single movable pulley, MA is _____.
Answer» ANSWER :A

Discussion

113.	A body is moved along the sides of a triangle ABC once in anticlockwise direction by applying different forces along different sides as represented in the figure . The total displacement of the body and work done by the forces are "______" and "_______" respectively.
Answer» 23 m , 26 J 15 m , 21 J 25 m , 32 J 0 m , 258 J ANSWER :D

Discussion

114.	Compete the following table.{:(,,"Arrival Time","Time"),("Train","Place","(24-hour clock)","(12-hour clock)"),("Charminar","Secunderabad",18:50,),("Express",,,),("Krishna","Tirupathi",6:30,),("Express",,,):}
Answer» SOLUTION :The TIME 18:50 is EXPRESSED as 18:50 in 24-hour CLOCK SYSTEM and it is expressed as 6:50 p.m. in 12-hour clock system. Time 6:30 is expressed as 6:30 in 24-hour clock system and it is expressed as 6:30 a.m. in 12-hour clock system.

Discussion

115.	Electrical energy ____ through an open circuit.
Answer» SOLUTION :Does not FLOW

Discussion

116.	Define volume.
Answer» SOLUTION :Space OCCUPIED by a BODY is called its volume.

Discussion

117.	The contact force acting on a dropped body is
Answer» Solution :ZERO (or) frictional FORCE DUE to AIR

Discussion

118.	Give scientific reasons.Bones of skull are immovable.
Answer» Solution :Bones of skull are made up of dibroid joints or fixed joints. These joints have no cavity and are CONNECTED to connective tissue. Skull bones are conneted by immoveble fibroid joind JOINS called sutrues, hence, they are immovable.

Discussion

119.	What is the purpose of oiling machinery ?
Answer» SOLUTION :To REDUCE friction between the WORKING parts of the machine OIL is USED.

Discussion

120.	Every magnet has both ________
Answer» ANSWER :NORTH and SOUTH POLES.

Discussion

121.	Find the acceleration of the car, if it changes its velocity from 20 m s^(-1) to 30 ms^(-1) in 5 seconds.
Answer» SOLUTION :`a=(v-u)/(t)` `a=(30-20)/(5)=2` `a=2 m s^(-2)`

Discussion

122.	Define length.
Answer» Solution :Extent of a body from ONE END to other end is CALLED length.

Discussion

123.	Birds have bones which are
Answer» Fish Snakes BIRDS Human beings Solution :Birds have hollow bones. HENCE, the CORRECT OPTION is ( C).

Discussion

124.	Regular oiling of parts increases their
Answer» Output work Efficiency Mechanical ADVANTAGE None of these Solution : OILING the MACHINERY reduces FRICTION and so there will be less energy LOST. Hence the ouput work also increases and so the efficiency of the machine increases.

Discussion

125.	A tailor purchased a scissors fo length 25 cm through online shopping. He sent a feedback to the manfacturer saying 'I cannot cut the Jeans cloth even if I apply my maximum force 83.3 N on it, so please modify it, so please modify it without changing its length so that I can cut the Jeans cloth at least with my maximum effort'. If you are the manufacturer, how can you modify the scissors as per the feed-back given by the tailor? Initially fulcrum is exactly midway between two ends of the scissors and the minimum force required to cut the jeans cloth is 500 N. The position of the load should always be at 7.5 cm from the free end of load arm.
Answer» Solution : (i) Before MODIFICATION: `MA=("Effort arm")/("Load arm")=(12.5)/(3)=2.5 cm` Required `E=(L)/(MA)=(500)/(2.5)=200 N` Required `E=(L)/(E)=(500)/(83.3)=6` (ii) After modification `MA=("Effort arm")/("Load arm")` `6=(x)/(17.5-x)` `implies` New effort arm =15 cm New load arm =17.5-15=2.5 cm Fulcrum should be shifted to 2.5 cm towards old load position.

Discussion

126.	Give reasons for the following.(a) Policemen regulatingtraffic often wear masks.(b) Whenwater is heated , bubbles are observed.
Answer» Solution :(a) Policemen wear MASKS in order to protect themselves from smoke and dust particles emitted by vehicles. (B)When water is heated , the air dissolved in it COMES out in the form of tiny BUBBLES.

Discussion

127.	1 N m^(-2)="________" "dyne " cm^(-2)
Answer» ANSWER :10

Discussion

128.	Fuels react with oxygen to form____________ and __________.
Answer» SOLUTION :FUELS react with oxygen to FORM`UNDERLINE( " CARBON dioxide")and underline("water vapour.")`

Discussion

129.	GasXsi the heaviest component of naturalair.(a) Identify X.(b)Mention the characteristic properties of X pertinent to combustion.
Answer» Solution :(a) X is carbon dioxide. (B) Carbon dioxide is neither combustable nor supporter of COMBUSTION.

Discussion

130.	Select the correct alternative from the given options .The evelope of air that surrounds the earth is called
Answer» ATMOSPHERE Lithosphere Hydrosphere Exosphere Solution :The envelope of air that surround the EARTH is called atmosphere.

Discussion

131.	What is magnetic compass ?
Answer» SOLUTION :Magnetic compass is a small box with glass cover. It consists of a MAGNETISED needle, which rotatesfreely and indicates north south direction when COMES to REST.

Discussion

132.	What is the physical quantity measured in cm^(2)?
Answer» ANSWER :AREA

Discussion

133.	Find the odd one out from the following .
Answer» ACCUMULATORS NICKEL CADMIUM cells Alkaline cells Lithium -ION cells Answer :C

Discussion

134.	Prefixes used for negative powers of 10 are called
Answer» Units Multiples Submultiples Standards. Answer :C

Discussion

135.	find the volume of solid sphere havingradius 2m?
Answer»

Discussion

136.	What is observed when glass and wood are placed in water in two containers? Give reason.
Answer» SOLUTION :Glass sinks in water and wood flats on water. Glass has a GREATER DENSITY than water. Wood has a LOT of pores which are filled with air and its APPARENT density is lesser than water.

Discussion

137.	In which among the follwowing situations evaporation causes cooling is not exploited?
Answer» We SWEAT to cool bodies OCCURRENCE of snowfall Stretching out of tongues by DOGS during summer Usage of earthen pots. Solution :The occurrence of snow FALL involves the conversion of water VAPOUR into tiny ice crystal. Hence, the correct option is (b)

Discussion

138.	The mass of mercury is 13.6 grams. Find its value in microgram.
Answer» Solution :`m_(Hg) = 13.6 g` `=13.6 xx 10^(6) mug` `=136 xx 10^(5) mug`

Discussion

139.	________ is an example for a cold source of light.
Answer» ANSWER :MOON

Discussion

140.	The electrical componenet/components used in a circuit to offer variable resistance is/are _____.
Answer» RESISTANCE box Rheostat Resistance Both (a) and (B) ANSWER :D

Discussion

141.	Which of the following is an example of wedge?
Answer» AXE Needle Knife All of the above Answer :D

Discussion

142.	An iron cylindar of base area 7 cm^2 and mass 10 kg is melted and reshaped into a into a rod of area of cross section 1cm^2.Calculate the increase in the pressure exerted on a plane surface when both the cylinder and the rod are madeto stand vertically on a plane surface (g= 10m^(-2))
Answer» `100 xx 10^4` pa `10 xx 10^4`Pa `14.28 xx 10^4 Pa` `85.72 xx 10^4 Pa` Solution :GIVE , MASS of cylinder , `m_c = 10kg` Base area of the cylinder , `A_c = 7 cm^2 = 7xx(10^-2)^2 = 7xx10^-4m^2` Pressure due to cylinder . `P_c = F_c/A_c = (m_cg)/A_c = (10xx10)/(7xx10^-4) = 14.28xx10^4 Pa` Mass of the rod , `m_r = 10 kg` Base area of the rod , `A_r =1cm^2 = 1xx(10^-2)^2 = 10^-4m^2` Pressure due to rod `P_r = F_r/A_r = (m_rg)/A_r = (10xx10)/10^-4 = 100xx10^4 Pa` Pressure due to `P_r-P_r=(100-14.28) xx 10^4)` Pa Hence the CORRECT OPTION is (d)

Discussion

143.	Ramp, Wheelbarrow, Winding road, Wooden planks
Answer» SOLUTION :EXAMPLES of INCLINED PLANE

Discussion

144.	An imaginary line bisecting the length of bar magnet is called _____
Answer» Magnetic axis Magnetic EQUATOR Effective length of MAGNET Length of magnet ANSWER :A

Discussion

145.	Why are ships ,aeroplanes and sports cars strem lined in shape ?
Answer» Solution :To reduce FRICTION due to AIR SHIPS, AEROPLANES and sports CARS are streamlined.

Discussion

146.	How will you show that air is essential forburning ?
Answer» Solution :If you invert a GLASS tumbler over a burning CANDLE, you will NOTICE that the candle extinguishes after sometime . Thisis because the oxygen that supports burning is CUT off when it is covered by the tumbler , and hence the candle stops burning.

Discussion

147.	Identify whether the following sentences are true or false. Also rewrite the false sentences by making suitable corrections. (a) The constituents of a compound can be separated by physical means. (b) Boron is a metal (c) Xenon is an inert gas. (d) Atom is the smallest unit of a compound. (e) Aluminium is the most abundant non-metal in the earth's crust.
Answer» Solution :(a) False. The constituetns of a compound can be separarted by chemical means. (b) Boron is a metalloid. (C) TRUE (d) Molecule is the smallest unit of a compound. (e) ALUMINIUM is the most abundant METAL in the earth's crust.

Discussion

148.	What is the efficiency of a machine, given mechanical advantage is 2 and velocity ratio is 4?
Answer» SOLUTION :The EFFICIENCY of a simple machine is ALWAYS LESS than 100%.

Discussion

149.	Conventional current flows from a ______ to ______ terminal of battery in a closed circuit.
Answer» POSITIVE to NEGATIVE negative to positive positive to positive negative to negative ANSWER :B

Discussion

150.	{:("Across",,"Down"),("3. Adjustment to habitat",,"1. Plants living in water"),("6. Plant which lives in desert ",,"2. Animals active during night"),("7. Gas released during photosynthesis",,"4. Interaction between biotic and abiotic community"),("8. Organisms which feed on dead animals",,"5. Period between birth and death"),("10. External agent to cause change",,"9. Primary source of energy"):}
Answer» Answer :`{:("Across",,"Down"),("3. Adaptation",,"1. Hydrophytes"),("6. CACTUS",,"2.Nocturnal"),("7. Oxygen ",," 4. Ecosystem "),("8. SCAVENGERS",,"5.Lifespan"),("10. Stimulus",,"9. Sun"):}`

Discussion

Explore topic-wise InterviewSolutions in .

The contituents present in the gases are responsible for acid rains are ____________ and _____________.

Namethe component of air which extinguishes fire . Givereasons.

Divyansh sat on a tree at a height of 2 metres . If he weighs 200 newtons , then what is the energy possessed by him in that situation.

Distinguish between skeleton and joint.

Classify the objects as opaque transparent and translucent : Fog, glass, wood, plastic box, smoke, water

Define the gravitational untis of force and relate them.

A body is said to be in a state of motion if it changes its _____.

Electric force exists between

Choose the incorrect one from the following.

Which animal has backbone and ribs interconnected with each other ?

If the slope of an inclined plane is steeper, the effort required to push a load through it is _____.

For a single movable pulley, MA is _____.

A body is moved along the sides of a triangle ABC once in anticlockwise direction by applying different forces along different sides as represented in the figure . The total displacement of the body and work done by the forces are "______" and "_______" respectively.

Compete the following table.{:(,,"Arrival Time","Time"),("Train","Place","(24-hour clock)","(12-hour clock)"),("Charminar","Secunderabad",18:50,),("Express",,,),("Krishna","Tirupathi",6:30,),("Express",,,):}

Electrical energy ____ through an open circuit.

Define volume.

The contact force acting on a dropped body is

Give scientific reasons.Bones of skull are immovable.

What is the purpose of oiling machinery ?

Every magnet has both ________

Find the acceleration of the car, if it changes its velocity from 20 m s^(-1) to 30 ms^(-1) in 5 seconds.

Define length.

Birds have bones which are

Regular oiling of parts increases their

Give reasons for the following.(a) Policemen regulatingtraffic often wear masks.(b) Whenwater is heated , bubbles are observed.

1 N m^(-2)="________" "dyne " cm^(-2)

Fuels react with oxygen to form____________ and __________.

GasXsi the heaviest component of naturalair.(a) Identify X.(b)Mention the characteristic properties of X pertinent to combustion.

Select the correct alternative from the given options .The evelope of air that surrounds the earth is called

What is magnetic compass ?

What is the physical quantity measured in cm^(2)?

Find the odd one out from the following .

Prefixes used for negative powers of 10 are called

find the volume of solid sphere havingradius 2m?

What is observed when glass and wood are placed in water in two containers? Give reason.

In which among the follwowing situations evaporation causes cooling is not exploited?

The mass of mercury is 13.6 grams. Find its value in microgram.

________ is an example for a cold source of light.

The electrical componenet/components used in a circuit to offer variable resistance is/are _____.

Which of the following is an example of wedge?

An iron cylindar of base area 7 cm^2 and mass 10 kg is melted and reshaped into a into a rod of area of cross section 1cm^2.Calculate the increase in the pressure exerted on a plane surface when both the cylinder and the rod are madeto stand vertically on a plane surface (g= 10m^(-2))

Ramp, Wheelbarrow, Winding road, Wooden planks

An imaginary line bisecting the length of bar magnet is called _____

Why are ships ,aeroplanes and sports cars strem lined in shape ?

How will you show that air is essential forburning ?

What is the efficiency of a machine, given mechanical advantage is 2 and velocity ratio is 4?

Conventional current flows from a ______ to ______ terminal of battery in a closed circuit.

The contituents present in the gases are responsible for acid rains are and _.

A body is moved along the sides of a triangle ABC once in anticlockwise direction by applying different forces along different sides as represented in the figure . The total displacement of the body and work done by the forces are "" and "_" respectively.

Fuels react with oxygen to form__ and .

Conventional current flows from a to terminal of battery in a closed circuit.