13753 + Interview Questions in Physics QA in Physics Page 41 InterviewSolution

2001.	Block B has a mass m and is released from rest when it is on top of wedge A, which has a mass 3m. Determine thetension in cord CD needed to hold the wedge from moving while B is sliding down A. Neglect frictionD C(A) msin 20rng(B) sin 62(C) mgsin θ4mg(D) sin θSIIn
Answer»

Discussion

2002.	7. A dise of radius R is cut out from a larger uniform disc of radius 2R in such a way that the edge of thehole touches the edge of the disc. Locate the centre of mass of remaining part.
Answer» please post clear image

Discussion

2003.	A metallic ring of radius 2cm and cross sectionalarea 4cm2 is fitted into a wooden circular diseof radius 4cm. If the Young's modulus of thematerial of the ring is2 x 10' N/m2, the forcewith which the metal ring expands is:
Answer» r=2cm=210^-2m R=4cm=410^-2mA=4cm^2=410^-4m^2 Y=210^11N/m^2 F=AY(R-r)/r=410^-4210^11(210^-2)/2^10^-2F=810^7N

2003.

A metallic ring of radius 2cm and cross sectionalarea 4cm2 is fitted into a wooden circular diseof radius 4cm. If the Young's modulus of thematerial of the ring is2 x 10' N/m2, the forcewith which the metal ring expands is:

Answer»

r=2cm=2*10^-2m

R=4cm=4*10^-2mA=4cm^2=4*10^-4m^2

Y=2*10^11N/m^2

F=AY(R-r)/r=4*10^-4*2*10^11(2*10^-2)/2*^10^-2F=8*10^7N

Discussion

2004.	10 kg m)A uniform circular disc has a moment of inertia 0.05 kg m2 about anaxis perpendicular to the dise and passing through the centre. Whatis the moment of inertia about an axis touching its edge andperpendicular to its plane? (0.015 kgm)
Answer»

Discussion

2005.	A4. Five homogeneous bricks, each of length L, are arranged as shown infigure. Each brick is displaced with respect to the one in contact by U5. Findthe x-coordinate of the centre of mass relative to the origin O shown.A unfom dise of cadiu
Answer» Please post clear image

Discussion

2006.	8. A bulb marked 12 V, 24 W operates on a12 volt battery for 20 minutes. Calculate:(i) the current flowing through it, and(ii) the energy consumed
Answer» Given, V = 12 V , I = 2A ,t = 10 minR = V /I= 12/ 2= 6 ohmenergy supplied= I×I×R×t= 2×2 × 6× (10× 60)= 14400 J

Discussion

2007.	Graws a current of U-5 A. Find the line voltage.resistances 10, 292, 322 and 422 are connected in series with a battery of 12 volt as shown in figure(Ans. 50 VCalculate :(1) the current given by battery.(i) potential difference across the ends of each resistance.1122023.249212V
Answer»

Discussion

2008.	To the potentiometer wire of length L and 10 Ωresistance, a battery of emf 2.5 volts and aresistance R are connected in series. If apotential difference of 1 volt is balanced acrossL/2 length, the value of R in Ω will be14.(4) 1 (B) 1.5 (C) 2 (D) 2.5
Answer»

Discussion

2009.	Four capacitors are connected as shown in the figure.Ci=3uF, C2=C3=Cx=9uF(i) Determine the equivalent capacitance between A and B.(ii) If a 4 volt battery is connected between A and B, what will be the total chargestored?(iii) If the battery is connected between A and D, what will be the total charge stored?HE
Answer» (i)1/9+1/9+1/9=1/3eq btw A&B is 3+3=6uF(ii) total charge stored is 4×6=24uC(iii) 4×(9/4+9/2) =27uC

Discussion

2010.	Two condensers, one of capacity C and the other of capacity are connected to a V volt battery, as[AIPMT-2007, RPMT-2008)2shown.The work doen in charging fully both the condensers is(1)2cVса4(3) cV22(4) CV2(2)hame a narallel nlate condenser of plate separation d and plate area of cross-
Answer» here equivalent total capacitances is c+c/2 = 3c/2 and work done is = (1/2)(Ceq)V² = (1/2)3C/2v² = 3/4cv². your option is wrong work done by battery is cv^2 so 3/2 cv^2 is the correct answer

2010.

Two condensers, one of capacity C and the other of capacity are connected to a V volt battery, as[AIPMT-2007, RPMT-2008)2shown.The work doen in charging fully both the condensers is(1)2cVса4(3) cV22(4) CV2(2)hame a narallel nlate condenser of plate separation d and plate area of cross-

Answer»

here equivalent total capacitances is c+c/2 = 3c/2

and work done is = (1/2)(Ceq)V² = (1/2)*3C/2*v² = 3/4cv².

your option is wrong

work done by battery is cv^2 so 3/2 cv^2 is the correct answer

Discussion

2011.	Qn.14. If a 12 volt battery is connected to the arrangement of resistances given below, calculatea) The total resistance in the circuitb) The total current in the circuitc) The P.d across the 25 ohm resistance.10325.2
Answer» a.4b.12vc.?I do not know the number c

Discussion

2012.	Three capacitors of value 6, 3 and 9 uF are joiaccording to the circuit and then the combination isconnected with a battery of 10 volt. The potentialdifference across the third capacitor plates will bened6uF(1) 4 v(3) 6 V(2) 5 V(4) 2 V
Answer» Ceq of parallel capacitor is = 6+3 = 9μF so Ceq of circuit = 9*9/(9+9) = 9/2μF now Q = CV = 45C so, PD across 9μF = Q/C = 45/9 = 5V option 2

2012.

Three capacitors of value 6, 3 and 9 uF are joiaccording to the circuit and then the combination isconnected with a battery of 10 volt. The potentialdifference across the third capacitor plates will bened6uF(1) 4 v(3) 6 V(2) 5 V(4) 2 V

Answer»

Ceq of parallel capacitor is = 6+3 = 9μF so Ceq of circuit = 9*9/(9+9) = 9/2μF

now Q = CV = 45C

so, PD across 9μF = Q/C = 45/9 = 5V

option 2

Discussion

2013.	The resistance of an electric wire of an alloy is 102.If the thickness of wire is 0.001 m and length is 1 m,find its resistivity.[Ans. 7.85 x 10-42 m)
Answer» Given:Resistance(R)=10Ω, length(L)=1m, Diameter=0.001m, Radius (Diameter/2)=0.005m. The area of the cross section of the wire is π r^2 Or, A = 3.14 x (0.005)^2 m^2 Or, A = 0.0000785 m^2. We know that, ρ= (RA)/L. Therefore, ρ= (10Ω0.0000785)sqm / 1m. ρ=10Ω*0.0000785. ρ=0.000785Ωm. Therefore, the resistance is 0.000785Ωm.

2013.

The resistance of an electric wire of an alloy is 102.If the thickness of wire is 0.001 m and length is 1 m,find its resistivity.[Ans. 7.85 x 10-42 m)

Answer»

Given:Resistance(R)=10Ω, length(L)=1m, Diameter=0.001m, Radius (Diameter/2)=0.005m.

The area of the cross section of the wire is

π r^2 Or, A = 3.14 x (0.005)^2 m^2 Or,

A = 0.0000785 m^2.

We know that, ρ= (R*A)/L.

Therefore,

ρ= (10Ω*0.0000785)sqm / 1m.

ρ=10Ω*0.0000785. ρ=0.000785Ωm.

Therefore, the resistance is 0.000785Ωm.

Discussion

2014.	2.Electric charge is uniformly distributed along a long straightwire of radius Imm. The charge per cm length of thewire is Q coulomb. Another cylindrical surface of radius50 cm and length lm symmetrically encloses the wire asshown in the figure. The total electric flux passing throughthe cylindrical surface is:1000(1)(2) 1000EO100() 1000+(3) 20050cm1000(neo)(FEO)
Answer» solution : charge enclosed inside the cylinderical surface is , = linear charge density of wire × length of cylinder = Q coulomb/cm × 100cm = 100Q Coulombs now, from Gauss theorem, electric flux through cylindrical surface = charge enclosed/permittivity of medium 100 coulomb is wrtot answer Option (2) is correct answer the answer could be option 4

2014.

2.Electric charge is uniformly distributed along a long straightwire of radius Imm. The charge per cm length of thewire is Q coulomb. Another cylindrical surface of radius50 cm and length lm symmetrically encloses the wire asshown in the figure. The total electric flux passing throughthe cylindrical surface is:1000(1)(2) 1000EO100() 1000+(3) 20050cm1000(neo)(FEO)

Answer»

solution : charge enclosed inside the cylinderical surface is , = linear charge density of wire × length of cylinder

= Q coulomb/cm × 100cm = 100Q Coulombs

now, from Gauss theorem,

electric flux through cylindrical surface = charge enclosed/permittivity of medium

100 coulomb is wrtot answer

Option (2) is correct answer

the answer could be option 4

Discussion

2015.	3. An electric current of 15 A flows in a wire of area ofcross-section 10-5 m2. Calculate drift velocity ofelectrons if the number of electrons per m3 of the wireof electric conduction is 8.4 x 1028. Given that chargeon electron is 1.6 x 10-19 C. Ans. 1.116 x 10-4 ms-1]
Answer»

Discussion

2016.	17 IfA's salary is 40% more than B's by what percent is B's salary less than A's salary?2. 23%b. 285c. 28 100d. 30%31
Answer»

Discussion

2017.	ayer ?13.002The ozone layer is mainly damaged by
Answer» It is mainly damaged by CFCcloroflorocarbon.Pollution as well CFC AND ClOROFLOROCARBAN

2017.

ayer ?13.002The ozone layer is mainly damaged by

Answer»

It is mainly damaged by CFCcloroflorocarbon.Pollution as well

CFC AND ClOROFLOROCARBAN

Discussion

2018.	A 9 gresistance is cut into three equal parts and connected in parallel. Find the equivalentresistance of the combination.
Answer» If you find this solution helpful, Please like it.

Discussion

2019.	Two material bars A and B of equal area of cross-section, are connected in series to a DCsupply. A is made of usual resistance wire and B of an n-type semiconductor(a) In which bar is drift speed of free electrons greater?(b) Ifthe same constant current continues to flow for a long time, how will the voltagedrop across A and B be affected?Justify each answer.
Answer» a) In bar B drift speed is higher. Since, I=neAV For semiconductor n is lower b). With increase in resistance in A potential difference increases and in bar B with increase in resistance potential difference decreases. Like my answer if you find it useful!

2019.

Two material bars A and B of equal area of cross-section, are connected in series to a DCsupply. A is made of usual resistance wire and B of an n-type semiconductor(a) In which bar is drift speed of free electrons greater?(b) Ifthe same constant current continues to flow for a long time, how will the voltagedrop across A and B be affected?Justify each answer.

Answer»

a) In bar B drift speed is higher.

Since, I=neAV

For semiconductor n is lower

b). With increase in resistance in A potential difference increases and in bar B with increase in resistance potential difference decreases.

Like my answer if you find it useful!

Discussion

2020.	D. SHORT-ANSWER QUESTIONS1. Distinguish between kharif and rabi crops, giving two examples of eachon production, in sequential order.
Answer»

Discussion

2021.	during the change of satel4 Suggest a method to liquelyatmospheric gases
Answer» By increasing pressure

Discussion

2022.	3Suggest two reasons why cooking pots are made of metal, not plastic.
Answer» It is because metals conduct heat very quickly. This is the only reason. To do cooking in less time metals are used. Aluminium is often used as cooking utensils as the coefficient of thermal expansion is very high as well as it conducts more heat. And it's very old custom of using metals as cooking utensils the ancient Indus Valley civilization people used bronze metal as utensils which is an alloy of copper and tin. Because bronze is corrosion resistant. Earthen pots were used in medieval times other than metals which used to give good taste to food cooked in pots. But pots takes so much time to conduct heat and cooking in Earthen pots takes more time and so as time passed the use of Earthen pots lessened and use of metals filled the space. 2 reason not only 1 1. Aluminum, copper and many more metal are good conductor of heat which allow the metals to be used as utensils. 2. Secondly, some the metals like aluminum are cheap and durable. 3. Utensils of different shapes can be obtained easily due to their property of deformation without losing toughness.

2022.

3Suggest two reasons why cooking pots are made of metal, not plastic.

Answer»

It is because metals conduct heat very quickly. This is the only reason. To do cooking in less time metals are used. Aluminium is often used as cooking utensils as the coefficient of thermal expansion is very high as well as it conducts more heat. And it's very old custom of using metals as cooking utensils the ancient Indus Valley civilization people used bronze metal as utensils which is an alloy of copper and tin. Because bronze is corrosion resistant. Earthen pots were used in medieval times other than metals which used to give good taste to food cooked in pots. But pots takes so much time to conduct heat and cooking in Earthen pots takes more time and so as time passed the use of Earthen pots lessened and use of metals filled the space.

2 reason not only 1

1. Aluminum, copper and many more metal are good conductor of heat which allow the metals to be used as utensils.

2. Secondly, some the metals like aluminum are cheap and durable.

3. Utensils of different shapes can be obtained easily due to their property of deformation without losing toughness.

Discussion

2023.	2 1) In NPN transistor, 1010electrons enters in emitter region in10?6 sec. If 2% electrons are lost inbase region then collector currentand current amplification factor (b)respectively are
Answer»

Discussion

2024.	LÄ°E\|Explofn.the-Construction-Ondru)orkinOld
Answer»

Discussion

2025.	ess 1 kg is dropped from 20 m height on ground and it rebounds to height 5 mof dhange in momentum during its collision with the ground. (Take g 10 m/s
Answer»

Discussion

2026.	on a lona meibspeeos sidh Saspect to beltwhill beapeed ve tonere opee stomea velo ciess onthe tme taleem by 1-e fome ta tonto fо-
Answer»

Discussion

2027.	ample 10.7 Relative density of silver is10.8. The density of water is 10 kg mWhat is the density of silver in SI unit?-3
Answer» Relative density is the ratio of the density of a substance to the density of water. It is also known as specific gravity. Here, in this case Relative density = Density of silver/Density of water 10.8 = density of silver/10³ kgm³ Density of silver = 10.8 × 10³ kgm³ or 10800 kgm³

2027.

ample 10.7 Relative density of silver is10.8. The density of water is 10 kg mWhat is the density of silver in SI unit?-3

Answer»

Relative density is the ratio of the density of a substance to the density of water. It is also known as specific gravity.

Here, in this case

Relative density = Density of silver/Density of water

10.8 = density of silver/10³ kgm³

Density of silver = 10.8 × 10³ kgm³ or 10800 kgm³

Discussion

2028.	A car is priced at $7200. The car dealer allows a customepay a oneHow much extra4. Aurd deposit and 12 payments odoes it cost the customer?
Answer» sir app kon aur app ko ye ans pata kasi calte hai

Discussion

2029.	07, A radar sends a signal to an aeroplane at a distane45 km away with a speed of 3 x 10 m s1. Afterhow long is the signal received back from theaeroplane?
Answer» thanks bro thank you

2029.

07, A radar sends a signal to an aeroplane at a distane45 km away with a speed of 3 x 10 m s1. Afterhow long is the signal received back from theaeroplane?

Answer»

thanks bro

thank you

Discussion

2030.	07)What is the correct relation between Îą and Î˛.
Answer» A transistors current gain is given the Greek symbol ofBeta, (β). As the emitter current for a common emitter configuration is defined as Ie = Ic + Ib, theratioof Ic/Ie is calledAlpha, given the Greek symbol ofα. Note: that the value ofAlphawill always be less than unity.alpha=Ic/Ie= beta/1+betabeta =Ic/Ib=alpha/1-alpha

Discussion

2031.	Three balls of masses m,, m, and m, are lying in straight line. The firstball is moved with a certain velocity so that is strikes the second balldirectly and itself comes to rest. The second ball collides with the thirdand is itself comes to rest. If 'e' be the coefficient of restitution for eachball, then choose the correct relation1) m.m, = m2) )m,m, = 2 m3) m,m = 5 m4) mm = 4 m
Answer» 1 is the correct answee option 1,is the right answer of question m1m3=m2^2 is the right answer option 1 is the correct answer. First is correct answer

2031.

Three balls of masses m,, m, and m, are lying in straight line. The firstball is moved with a certain velocity so that is strikes the second balldirectly and itself comes to rest. The second ball collides with the thirdand is itself comes to rest. If 'e' be the coefficient of restitution for eachball, then choose the correct relation1) m.m, = m2) )m,m, = 2 m3) m,m = 5 m4) mm = 4 m

Answer»

1 is the correct answee

option 1,is the right answer of question

m1m3=m2^2 is the right answer

option 1 is the correct answer.

First is correct answer

Discussion

2032.	Multiple Choice Questions with one correct answer. A correct answer carries 4 marks. A wronganswer carries a penalty of 1 mark.1· Three mdsses are stacked vertically up between 2 smooth surfaces. Find the acceleration of the system,45 x 418010 ms1 kg2 kg3 kg70 N(a) 1.67 ims(b) 2.16 ins(c) 3.5 ms-2(d) 4.2 ms
Answer»

Discussion

2033.	Question number 22 to 25 carries one mark each.22) Which of the following is not a green house gas?a)Methanec) Carbon Monoxideb)Carbon dioxided) Ammonia
Answer» carbon monoxide is not a green house gas

Discussion

2034.	106. Write the truth of AND gate.
Answer»

Discussion

2035.	Q.3 What is mean by thin prism?
Answer» A prism whose angle is less than 10° is called a thin prism

Discussion

2036.	13. Fig 3.35 shows a brick of weight 2 kgf anddimensions 20 cm x 10 cm x 5 cm placed inthree different positions on the ground. Find thepressure exerted by the brick in each case.
Answer» p=500 pls give me my best p= 500 pls give me my best 500 the correct answer of the given question

2036.

13. Fig 3.35 shows a brick of weight 2 kgf anddimensions 20 cm x 10 cm x 5 cm placed inthree different positions on the ground. Find thepressure exerted by the brick in each case.

Answer»

p=500 pls give me my best

p= 500 pls give me my best

500 the correct answer of the given question

Discussion

2037.	In an electromagnetic field, the amplitude of magnetic field is 3 x 10^-10 T. If the frequency of the waves is 10^12 Hzthen the amplitude of the associated electric field will be(1) 9 10^2 V/m(2) 3 10^2 V/m(3) 3 10^10 VIm(4)9 Vim
Answer»

Discussion

2038.	If the linfind its kinetic energy? If the kinetic energy of a particleis known can you find its linear momentum?ear momentum of a particle is known, can you2. Colhout the oentre of mass of a uniform
Answer»

Discussion

2039.	heirspeedsareTwo cars of masses m, and m2 are moving in circdes of radi r, and r2, respectively. Tsuch that they make complete cirdles in the same time t The ratio of their centripetal acceleration isAIEEE 2012 4/120,-1]m1 11m2 r2(2) m1 m2(3) r r2
Answer» pls post clear answer

Discussion

2040.	6. Mulltiply 4,/12 by 27 and write the answer in thesimplest form.
Answer» 4√12√27=4√232333=4233=89=72

Discussion

2041.	In the arrangment of resistances shown below, theeffective resistance between points A and B is0052100 15010Ω10Ω20Ω30Ω
Answer»

Discussion

2042.	\left. \begin{array} { l l } { 100 m / s ^ { 2 } } & { ( 3 ) } & { 16.25 m / s ^ { 2 } } \\ { 50 m / s ^ { 2 } } & { ( 4 ) } & { 6.25 m / s ^ { 2 } } \end{array} \right.
Answer»

Discussion

2043.	\frac { R _ { 1 } } { R _ { 2 } } = \frac { 1 + 3.94 \times 10 ^ { - 3 } \times 27.5 } { 1 + 3.94 \times 10 ^ { - 3 } \times 100 }
Answer»

Discussion

2044.	Keeping the velocity of projection constant, the angleof projection is increased from 0 to 90°, then thehorizontal range of the projectile30.(1) goes on increasing upto 90°(2) increases upto 45° and decreases afterwards(3) decreases upto 90(4) decreases upto 45° and increases afterwards.
Answer» the horizontal range depends is proportional to sin2θ , where θ is the projection angle. Thus for θ =45 degrees the horizontal range is maximum as sin90 degrees =1

Discussion

2045.	An ammeter of resistance 0.80 Ω can measure current upto 1.0 A.(i) What must be the value of shunt resistance to enable the ammeter to measure current upto 5.0 A?(ii) What is the combined resistance of the ammeter and the shunt?
Answer»

Discussion

2046.	Choose the correct answer1, Position of a particle is given by g. A(2i+5ti+412)m. Acceleration of particle is tgiven by(1) 5įm㎡81 m/s(2)(4) 4
Answer»

Discussion

2047.	09. Why our shoe sole is grooved?*
Answer» shoe sole is grooved because if our shoe's will not grooved then we will slip due to no friction.

Discussion

2048.	18. The figure shows the field lines of a positive point charge. What will be the sigpotential energy difference of a small negative charge between the points Q and P? Justanswer.aÂŤĐ
Answer» Negative; As the charge is displaced against the force exerted by the field.

Discussion

2049.	What is an ideal gas? Why the real gases do shows deviation from ideal behavior? Show these deviations graphically
Answer» It is a theoretical gas composed of many randomly moving point particles whose only interactions are perfectly elastic collisions.

Discussion

2050.	Figure shows a plot of the transverse displacements ofthe particles of a string at t-0 through which a travellingwave is passing in the positive x-direction. The wavespeed is 20 cm/s. Find (a) the amplitude,(b) thewavelength, (c) the wave number and (d) the frequencyof the wave
Answer»

Discussion

Explore topic-wise InterviewSolutions in .

Block B has a mass m and is released from rest when it is on top of wedge A, which has a mass 3m. Determine thetension in cord CD needed to hold the wedge from moving while B is sliding down A. Neglect frictionD C(A) msin 20rng(B) sin 62(C) mgsin θ4mg(D) sin θSIIn

7. A dise of radius R is cut out from a larger uniform disc of radius 2R in such a way that the edge of thehole touches the edge of the disc. Locate the centre of mass of remaining part.

A metallic ring of radius 2cm and cross sectionalarea 4cm2 is fitted into a wooden circular diseof radius 4cm. If the Young's modulus of thematerial of the ring is2 x 10' N/m2, the forcewith which the metal ring expands is:

10 kg m)A uniform circular disc has a moment of inertia 0.05 kg m2 about anaxis perpendicular to the dise and passing through the centre. Whatis the moment of inertia about an axis touching its edge andperpendicular to its plane? (0.015 kgm)

A4. Five homogeneous bricks, each of length L, are arranged as shown infigure. Each brick is displaced with respect to the one in contact by U5. Findthe x-coordinate of the centre of mass relative to the origin O shown.A unfom dise of cadiu

8. A bulb marked 12 V, 24 W operates on a12 volt battery for 20 minutes. Calculate:(i) the current flowing through it, and(ii) the energy consumed

Graws a current of U-5 A. Find the line voltage.resistances 10, 292, 322 and 422 are connected in series with a battery of 12 volt as shown in figure(Ans. 50 VCalculate :(1) the current given by battery.(i) potential difference across the ends of each resistance.1122023.249212V

To the potentiometer wire of length L and 10 Ωresistance, a battery of emf 2.5 volts and aresistance R are connected in series. If apotential difference of 1 volt is balanced acrossL/2 length, the value of R in Ω will be14.(4) 1 (B) 1.5 (C) 2 (D) 2.5

Two condensers, one of capacity C and the other of capacity are connected to a V volt battery, as[AIPMT-2007, RPMT-2008)2shown.The work doen in charging fully both the condensers is(1)2cVса4(3) cV22(4) CV2(2)hame a narallel nlate condenser of plate separation d and plate area of cross-

Qn.14. If a 12 volt battery is connected to the arrangement of resistances given below, calculatea) The total resistance in the circuitb) The total current in the circuitc) The P.d across the 25 ohm resistance.10325.2

Three capacitors of value 6, 3 and 9 uF are joiaccording to the circuit and then the combination isconnected with a battery of 10 volt. The potentialdifference across the third capacitor plates will bened6uF(1) 4 v(3) 6 V(2) 5 V(4) 2 V

The resistance of an electric wire of an alloy is 102.If the thickness of wire is 0.001 m and length is 1 m,find its resistivity.[Ans. 7.85 x 10-42 m)

3. An electric current of 15 A flows in a wire of area ofcross-section 10-5 m2. Calculate drift velocity ofelectrons if the number of electrons per m3 of the wireof electric conduction is 8.4 x 1028. Given that chargeon electron is 1.6 x 10-19 C. Ans. 1.116 x 10-4 ms-1]

17 IfA's salary is 40% more than B's by what percent is B's salary less than A's salary?2. 23%b. 285c. 28 100d. 30%31

ayer ?13.002The ozone layer is mainly damaged by

A 9 gresistance is cut into three equal parts and connected in parallel. Find the equivalentresistance of the combination.

D. SHORT-ANSWER QUESTIONS1. Distinguish between kharif and rabi crops, giving two examples of eachon production, in sequential order.

during the change of satel4 Suggest a method to liquelyatmospheric gases

3Suggest two reasons why cooking pots are made of metal, not plastic.

2 1) In NPN transistor, 1010electrons enters in emitter region in10?6 sec. If 2% electrons are lost inbase region then collector currentand current amplification factor (b)respectively are

LÄ°E|Explofn.the-Construction-Ondru)orkinOld

ess 1 kg is dropped from 20 m height on ground and it rebounds to height 5 mof dhange in momentum during its collision with the ground. (Take g 10 m/s

on a lona meibspeeos sidh Saspect to beltwhill beapeed ve tonere opee stomea velo ciess onthe tme taleem by 1-e fome ta tonto fо-

ample 10.7 Relative density of silver is10.8. The density of water is 10 kg mWhat is the density of silver in SI unit?-3

A car is priced at $7200. The car dealer allows a customepay a oneHow much extra4. Aurd deposit and 12 payments odoes it cost the customer?

07, A radar sends a signal to an aeroplane at a distane45 km away with a speed of 3 x 10 m s1. Afterhow long is the signal received back from theaeroplane?

07)What is the correct relation between Îą and Î˛.

Question number 22 to 25 carries one mark each.22) Which of the following is not a green house gas?a)Methanec) Carbon Monoxideb)Carbon dioxided) Ammonia

106. Write the truth of AND gate.

Q.3 What is mean by thin prism?

13. Fig 3.35 shows a brick of weight 2 kgf anddimensions 20 cm x 10 cm x 5 cm placed inthree different positions on the ground. Find thepressure exerted by the brick in each case.

In an electromagnetic field, the amplitude of magnetic field is 3 x 10^-10 T. If the frequency of the waves is 10^12 Hzthen the amplitude of the associated electric field will be(1) 9 10^2 V/m(2) 3 10^2 V/m(3) 3 10^10 VIm(4)9 Vim

If the linfind its kinetic energy? If the kinetic energy of a particleis known can you find its linear momentum?ear momentum of a particle is known, can you2. Colhout the oentre of mass of a uniform

heirspeedsareTwo cars of masses m, and m2 are moving in circdes of radi r, and r2, respectively. Tsuch that they make complete cirdles in the same time t The ratio of their centripetal acceleration isAIEEE 2012 4/120,-1]m1 11m2 r2(2) m1 m2(3) r r2

6. Mulltiply 4,/12 by 27 and write the answer in thesimplest form.

In the arrangment of resistances shown below, theeffective resistance between points A and B is0052100 15010Ω10Ω20Ω30Ω

\left. \begin{array} { l l } { 100 m / s ^ { 2 } } &amp; { ( 3 ) } &amp; { 16.25 m / s ^ { 2 } } \\ { 50 m / s ^ { 2 } } &amp; { ( 4 ) } &amp; { 6.25 m / s ^ { 2 } } \end{array} \right.

\frac { R _ { 1 } } { R _ { 2 } } = \frac { 1 + 3.94 \times 10 ^ { - 3 } \times 27.5 } { 1 + 3.94 \times 10 ^ { - 3 } \times 100 }

Keeping the velocity of projection constant, the angleof projection is increased from 0 to 90°, then thehorizontal range of the projectile30.(1) goes on increasing upto 90°(2) increases upto 45° and decreases afterwards(3) decreases upto 90(4) decreases upto 45° and increases afterwards.

An ammeter of resistance 0.80 Ω can measure current upto 1.0 A.(i) What must be the value of shunt resistance to enable the ammeter to measure current upto 5.0 A?(ii) What is the combined resistance of the ammeter and the shunt?

Choose the correct answer1, Position of a particle is given by g. A(2i+5ti+412)m. Acceleration of particle is tgiven by(1) 5įm㎡81 m/s(2)(4) 4

09. Why our shoe sole is grooved?*

18. The figure shows the field lines of a positive point charge. What will be the sigpotential energy difference of a small negative charge between the points Q and P? Justanswer.aÂŤĐ

What is an ideal gas? Why the real gases do shows deviation from ideal behavior? Show these deviations graphically

Figure shows a plot of the transverse displacements ofthe particles of a string at t-0 through which a travellingwave is passing in the positive x-direction. The wavespeed is 20 cm/s. Find (a) the amplitude,(b) thewavelength, (c) the wave number and (d) the frequencyof the wave

\left. \begin{array} { l l } { 100 m / s ^ { 2 } } & { ( 3 ) } & { 16.25 m / s ^ { 2 } } \\ { 50 m / s ^ { 2 } } & { ( 4 ) } & { 6.25 m / s ^ { 2 } } \end{array} \right.