67486 + Interview Questions in Secondary School in Physics

1.	Someone please send me class 9 science syllabusplease it's very uurgentcbse
Answer» I don't have it. so don't ASK me

Discussion

2.	A bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus. AND ANSWER IS 0.8seconds
Answer» are given that, the bus is moving with a Initial Velocity (U) = 30 km/hr and bus stops when brakes are applied THEREFORE, the Final Velocity (v) will be 0 m/s and distance (s) is given as 10 m. and we are asked to find the time TAKEN to stop the bus.To solve this QUESTION first we have to make the UNITS same. So, convert the initial velocity (u) from km/hr to m/s :So, we have converted the units to m/s and now we will find the acceleration (a) of the bus by using third kinematical equation of motion :Now, by using first kinematical equation of motion we can calculate the time taken by the bus :

Discussion

3.	What is Speed ?????????????
Answer» Speed can be thought of as the rate at which an object covers distance. ... Speed has the dimensions of distance divided by time. The SI unit of speed is the METRE per SECOND, but the most COMMON unit of speed in EVERYDAY usage is the kilometre per hour or, in the US and the UK, miles per hour.hope it's helpful to you ☺️

Discussion

4.	Express escape velocity in terms of g and R
Answer» ESCAPE VELOCITY =√2grhope it HELPS

Discussion

5.	A vector =2i-j+k,B vector=i-j find theta?
Answer» LET a=i^+j^+k^ and b=2i^−2j^+2k^ and ANGLE between them be θThen, cosθ=∣a∣∣b∣a⋅b=(1)2+(1)2+(1)2(2)2+(−2)2+(2)2(i^+j^+k^)⋅(2i^−2j^+2k^)=3122−2+2=62=31⇒θ=cos−1(31)

Discussion

6.	As as gemma cupes(i) In gymnosperm, sporangia are borne in sporophylls which are arranged spirally in a compact axisknown as
Answer» someone else's husband.Reason:2. President Duterte orders several government agencies to continueplacing dolomite sands in a small portion of Manila Bay during pandemic.Reason:3. MaeMae is in the verge of failing her exam in GENERAL Mathematics.While she is taking the exams, she received a small piece of PAPER from hisclassmate Ben. The piece of paper contains all the answers for the last portion ofthe exam.Reason:4. Molina is in-charge of the distribution of medicines in herbarangay. The local government of Imus usually provides for extra PACKAGES ofmedicines as a buffer stock or RESERVE in case of uncounted members of barangay.One day, Josielyn, a citizen from Calamba City, offers to buy the extra packages ofmedicine from Molina, because there is a shortage of medicines in Calamba.Molina, in TURN, sold the extra medicines to Josielyn.Reason:Explanation:plz mark me the brainliest

Discussion

7.	Give the reason why the horizontal components of the velocity of projectile remains the same at every point of its flight
Answer» Answer. Because there is no accelerating acting in the HORIZONTAL direction. ... VELOCITY only changes when an acceleration ACTS on the body.. The only acceleration acting is gravity,which is acting vertically downward.hope it HELPS YOUMARK as brainliest

Discussion

8.	a bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus.
Answer» INITIAL velocity = u = 30km/hourFinal velocity = v = 0m/sDistance Travelled = 10m━━━━━━━━━━━━━━━━Need to find:-Time taken to stop = ?━━━━━━━━━━━━━━━━Solution:- → u = 30km/hour→ u = 30 × 1000m/hour→ u = 30000 ÷ 3600 m / sec→ u = 50/6 m/sec━━━━━━━━━From 3rd equation of motion, SUBSTITUTE the VALUES,→→→→━━━━━━━━━We KNOW from 1st equation of motion:v = u + at→ →→→→→

Discussion

9.	The distance between pole and focus is1) pole2) focus3) focal length4) centre
Answer» 3) FOCAL lengthExplanation:The DISTANCE between POLE and FOCUS is ꜰᴏᴄᴀʟ ʟᴇɴɢʜᴛ

Discussion

10.	A body having light energy of its own feetनथिंग
Answer» HGG a HOME TEST PORTION of the correctydhdjjdjjxdjdjdjjdhxxjjxxjjxjjdjjdjj

Discussion

11.	two resistors of 5 ohms and 3 ohms respectively are connected in parallel wirh a 15 ohm resistor in series. A 6 Volt pd is applied across this circuit. find the current flowing through the 3 ohm resistor?
Answer» A resistance of 3 OHMS is connected in series with ANOTHER resistance of 5 ohms . A potential difference of 6 volts is applied ACROSS the combination.

Discussion

12.	The energy is neither created nor destroyed in a system , or is know asटिक द करेक्ट ऑप्शन
Answer» TION:आई डोंट अंडरस्टैंड योर क्वेश्चन

Discussion

13.	The gravitational force between two particles separated by a distance r varies as_____ A)1/rB) rC)r^2D)1/r^2
Answer» TION:A}. 1/rI HOPE it MAY HELP to you..

Discussion

14.	We know that, for sound, speed = wavelength × frequency=> frequency = speed/wavelength=> SI unit of frequency = SI unit of speed/SI unit of wavelength = (m/s)÷ m = s.So, SI unit of frequency = second = s.But, we know that SI unit of frequency = Hertz.What is the correct SI unit of frequency then?Is it second, or Hertz?
Answer» TRY try until you succeed OK once you tryhope it's helpful to you MARK me as brainliest all the BEST try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best try try until you succeed ok once you tryhope it's helpful to you Mark me as brainliest all the best

Discussion

15.	9. The unit of entropy is:a) JKb)Kc)Ilthyd)
Answer» C sjjsjekkekekekkekekekekkek

Discussion

16.	Measurement of internal resistance of a cell in potentiometer? answer in ddetaildon't spam
Answer» Potentiometer is a device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and POTENTIAL difference ACROSS a resistor. It consists of a long wire of uniform cross SECTIONAL area and of 10 m in length.The wires are joined in series by using THICK copper STRIPS. Hope it helps ✨❤️

Discussion

17.	Explain suitability of different basalts for tunneling?
Answer» basalt lava has a low VISCOSITY due to its RELATIVELY low silica content (between 45% and 52%), resulting in rapidly moving lava flows that can spread over great areas before cooling and solidifying.[11] Flood basalts are thick sequences of many such flows that can COVER hundreds of thousands of square kilometers and constitute the most voluminous of all volcanic formations.[1

Discussion

18.	D) TiI, T₂8. Working cycle of a typical petrol engineconsists of:a) Two strokesb) Four strokesc) Six strokesd) Eight strokesThe unit of entrony is.
Answer» basalt lava has a low viscosity due to its RELATIVELY low silica content (between 45% and 52%), resulting in rapidly moving lava flows that can spread over great areas before cooling and solidifying.[11] FLOOD basalts are thick sequences of many such flows that can cover hundreds of thousands of SQUARE kilometers and constitute the most voluminous of all volcanic FORMATIONS.[1

Discussion

19.	Which of the following rays are not electromagnetic wavesSelect one:a. Gamma raysb. Heat raysO c. Beta raysd. X rays
Answer» HEAT RAYS MAYBE the ANSWER to the above QUESTION

Discussion

20.	27. The efficiency of a Carnot engine betwe HTR at T, and LTR at T2 is given by:a) 1T1 -T.b) T-TITTTI-TTd)Ti-T2.T
Answer» not engine-η(efficiency)=1− T H T L T H = high TEMPERATURE (sources)T L = low temperature(SINK)For same efficiency, ratio of temperature should REMAIN same.Option (A)2T 1 and2T 2 2T 2 2T 1 = T 2 T 1

Discussion

21.	planet P has an orbital radius that is twice that of planets you both revolving around the star if the mass of planetP is also twice that of planetQ you then find the ratio of the force of gravitation between planet p and the star and planetq and the star
Answer» isi BICH ye SOCH rahi isi ISPAT isi UDI II ii

Discussion

22.	The Potwar Plateau is in _______ range. A) HimachalB) HimadriC) ShiwalikD) Lower Himalayas
Answer» SALT rangeExplanation:HOPE it will HELP

Discussion

23.	C) Both d) None of theseThe efficiency of diesel engine is about:a) 50% to 60%b) 25% to 30%c) 35% to 40%d) 40% to 50%. The efficiency of petrol engine is about:o
Answer» 35% to 40%PLEASE MARK me brainlaist

Discussion

24.	5.14) જો સ્વાધ્યાય 5.13 ના ગજિયા ચુંબકને 180° જેટલો ઘુમાવવામાં આવે તો હવે નવા તટસ્થ બિંદુઓ ક્યાં (કેટલા
Answer» I cannot UNDERSTAND this LANGUAGE Explanation:Please MARK me as BRAINLIST please

Discussion

25.	Two small pillars,each of cross se
Answer» what I can't UNDERSTAND can you PLEASE SEND

Discussion

26.	1. Carnot cycle is:a) Reversibleb) Irreversiblec) Bothd) None of these
Answer» NONE of THESEPLEASE MARK me brainlaist

Discussion

27.	7. The centre of sphere to which a spherical mirror is a part is called 1) centre of curvature2) pole3) Focus4) focal length
Answer» Centre of CURVATURE.The centre is called the centre of curvature of the spherical mirror. CENTER of curvature can ALSO be DEFINED as the POINT in the centre of the sphere from which the mirror was sliced. It is represented by the letter C.

Discussion

28.	If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V at point ( 1,-1,1) .If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V a point ( 1,-1,1) .
Answer»

Discussion

29.	8. What produces NIC D 9. Name A,B,C,D,E and F in the following diagram showingchange in its stateIncrease heat anddecrease pressureEABGASSOLIDLIQUIDСDFDecrease heat andincrease pressureSCIENCE
Answer» Interconversion of three states of matter: Any state of matter can be converted into other states with the HELP of TEMPERATURE or pressure. (A) Solid to Liquid→ Fusion(B)Liquid to Gas→Vaporisation(C)Gas to liquid→Condensation(D)Liquid to Solid →Solidification(E) Solid to Gas→Sublimation(F)Gas to Solid →Sublimation

Discussion

30.	The internal resistance of the milliammeter must be very low for Select one:a. High sensitivityb. High accuracyc. Maximum voltage drop across the meterd. Minimum effect on the current in the circuit
Answer» A HIGH VALUE of internal resistance will VARY the CURRENT considerably in a MILLI-ammeter as the current is in milli range. So the internal resistance of a milli-ammeter must be very low.

Discussion

31.	Flow much charge flows through a wire in 10 minutes of the current
Answer» CHARGE,Q = ? = 1500 C. Hence,1500 C of charge FLOWS through a wire in 10 minutes if the CURRENT PASSING through

Discussion

32.	calculate the angle between two vector p=3i^-j^+4k^ and q=i^+j^-6k^.also find the projection of p on q
Answer» KF,clclf,vkvogkgkg,blbkbk

Discussion

33.	In physics When heat is added to the system, the entropy change is:a) Positiveb) Negativec) Zerod) None
Answer» the CORRECT ANSWER is POSITIVE

Discussion

34.	20. Three LED bulbs of & Weach, Five fans of 40 W cach, an electric motor of 3 kW, and a geyserof ô KW ase used for 5 hours per day by a family.Calculate the cost of electricity used in 30 day atthe rate of 5/- per unit.O69107-O6918 V-O 6920 /-O none of these
Answer» O 69107Hope this HELPS you...

Discussion

35.	The ratio of limiting friction and normal reaction
Answer» I HOPE this ANSWER will HELP you

Discussion

36.	Find the refractive Index of rarer medium if the denser medium is 45°
Answer» Light travels from RARER medium 1 to denser medium 2. Angle of incidence & REFRACTION are 45 degree & 30 to the power of 0 resp

Discussion

37.	The magnetic field inside a long straight solenoid carrying current Select one:a. Decreases as we move towards its endb. Increases as we move towards its endc. Is zerod. Is the same at all points
Answer» POINT .d.Is the same at all POINTS

Discussion

38.	The shadow of a tree in an open field will be the smallest in size during- 1- early morning2- midday
Answer» The shadow of a TREE in an OPEN field will be the SMALLEST in size during-1- early morning√

Discussion

39.	Differentiate between the convex eye lens and ordinary convex lens please dont spam.the correct answer will be marked brainliest with a thank you and vote 5
Answer» The focal LENGTH of the convex eye-lens can be changed by the ACTION of ciliary MUSCLES, but the focal length of the ordinary convex lens made of glass is fixed.(b) Cornea, pupil, eye-lens, RETINA.

Discussion

40.	1. Static electricity always develops on a. Conductorb. insulatorc.none of thesed.both a and b
Answer» tion:It is believed that all ELEMENTS EXISTING on Earth in their natural state will always GENERATE static electricity. It can occur not only for SOLIDS elements, but also liquids and gases.

Discussion

41.	An 8 kg block initially at rest is pulled to the right...
Answer» 12 = 8A a = 12 / 8 a = 3/2 m/s^2

Discussion

42.	19. An electric bulb rated at 60W and a fan rated 15 W is connected to the mains supply. Find theamount of electrical energy consumed by thebulb in 25 days if the bulb is switched on for 8hours daily.20 kWO 15 kWO 25 kWO 22 kW
Answer» tion:GIVEN : t=6 hrs P=0.06 kWergy CONSUMED per day is:E=Pt=0.06×6=0.36 kWh=0.36 units

Discussion

43.	A weighting 9800 N is moving at 25 m/s. If the frictional forceacting on it is 2000 N.how fast the car moving when it has travelled 60 m
Answer» taking g = 9.8 m/s/s: mass of car = w / g = 9800 / 9.8 = 1,000 kg Negative acceleration of car = F / m = 2000 / 1000 = - 2 m/s/s Find V(f) USING kinematic equation: 2 a d = V(f)^2 - V(i)^2 → V(f) = 19.62 m/sExplanation:

Discussion

44.	. The ratio of distances traveled by two bodies A and B starting from rest moving along a straight line withequal accelerations is x, where x > 1, then(a) time taken by body A > time taken by body B.6) time taken by body A < time taken by body B.(c) time taken by body A 2 time taken by body B.(d) time taken by body A S time taken by body B.
Answer» io of DISTANCES traveled by two bodies A andB starting from rest moving along a straight LINE withequal accelerations is X, where x > 1, then(a) time taken by body A > time taken by body B.6) time taken by body A < time taken by body B.(C) time taken by body A 2 time taken by body B.(d) time taken by body A S time taken by body B.

Discussion

45.	6 Geocentric model i.e. the Earth is the orbital centre of all celestial bodies was proposed by
Answer» ccffhfb bhtjththgtjiiooooo

Discussion

46.	State and prove a) principle of parallel axes b) principle of perpendicular axes
Answer» EXPLANATION:principle of parallel axesThe moment of inertia of a rigid body about any axis is equal to the sum of its moment of inertia about a parallel axis through its centre of mass and the product of the mass of the body and the square of the distance between the two axes.The perpendicular axis theorem states that the moment of inertia of a PLANAR lamina about an axis perpendicular to the PLANE of the lamina is equal to the sum of the MOMENTS of inertia of the lamina about the two axes at right angles to each other, in its own plane intersecting each other at the point where the ...0

Discussion

47.	A body with an initial velocity of 18km.hr accelerates uniformly at the rate of 9cm/s over a distance of 200m , calculate acceleration in m/s and final velocity in m/s
Answer» with an INITIAL velocity of 18 km h^-1 ACCELERATES uniformly at the RATE of 9 cm s^-2 over a distance of 200 m. Calculate its FINAL velocity in ms^-1 .

Discussion

48.	If an electroscope is charged by induction, it acquires
Answer» In the induction process of CHARGING, a charged object is brought NEAR to but not TOUCHING the electroscope. The presence of the charged object above the plate of the electroscope, INDUCES electrons within the electroscope to MOVE accordingly.Explanation:

Discussion

49.	Write the Mayer's relation
Answer» Mayer's formula in Thermodynamics \| Cp - Cv = R - proof \| VIDEO in HINDI. ... we derived Mayer's LAW in thermodynamics. Mayer's formula is Cp - Cv = R. Here Cp is molar specific HEAT capacity of an ideal gas at constant pressure, Cv is its molar specific heat at constant volume and R is the gas constant.

Discussion

50.	The a TV of rating 100w is operated for 6 hours per day. find the number of units consumed in any leap year. (solve).
Answer» 219.6 is right answer AnswerIt is GIVEN that the total power of the TV is 100 W and it is operated 6 hr/day.The total number of days in a leap year is 366 days. Hence, the total time taken in a leap year is given as 6hours×366days=2196hours.The electric power in watts associated with a complete electric circuit or a circuit component REPRESENTS the rate at which energy is converted from the electrical energy of the moving charges to some other form, e.g., heat, mechanical energy, or energy stored in electric fields or magnetic fields. The power is given by the product of applied VOLTAGE and the electric current. That is, P=VI. The heat produced or the energy dissipated by an appliance is given by the product of power and time taken in seconds. That is, Q=Pt. So, Q=P×t=100W×2196hrs=219600Wh=219.6kWh.1 kWh = 1 unit.Hence, the number of UNITS consumed by the TV in any leap year is 219.6 units.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Someone please send me class 9 science syllabusplease it's very uurgentcbse

A bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus. AND ANSWER IS 0.8seconds​

What is Speed ?????????????​

Express escape velocity in terms of g and R​

A vector =2i-j+k,B vector=i-j find theta?​

As as gemma cupes(i) In gymnosperm, sporangia are borne in sporophylls which are arranged spirally in a compact axisknown as​

Give the reason why the horizontal components of the velocity of projectile remains the same at every point of its flight

a bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus.​

The distance between pole and focus is1) pole2) focus3) focal length4) centre​

A body having light energy of its own feetनथिंग ​

two resistors of 5 ohms and 3 ohms respectively are connected in parallel wirh a 15 ohm resistor in series. A 6 Volt pd is applied across this circuit. find the current flowing through the 3 ohm resistor?​

The energy is neither created nor destroyed in a system , or is know asटिक द करेक्ट ऑप्शन ​

The gravitational force between two particles separated by a distance r varies as_____ A)1/rB) rC)r^2D)1/r^2​

9. The unit of entropy is:a) JKb)Kc)Ilthyd)​

Measurement of internal resistance of a cell in potentiometer? answer in ddetaildon't spam

Explain suitability of different basalts for tunneling?​

D) TiI, T₂8. Working cycle of a typical petrol engineconsists of:a) Two strokesb) Four strokesc) Six strokesd) Eight strokesThe unit of entrony is.​

Which of the following rays are not electromagnetic wavesSelect one:a. Gamma raysb. Heat raysO c. Beta raysd. X rays​

27. The efficiency of a Carnot engine betwe HTR at T, and LTR at T2 is given by:a) 1T1 -T.b) T-TITTTI-TTd)Ti-T2.T​

planet P has an orbital radius that is twice that of planets you both revolving around the star if the mass of planetP is also twice that of planetQ you then find the ratio of the force of gravitation between planet p and the star and planetq and the star ​

The Potwar Plateau is in _______ range. A) HimachalB) HimadriC) ShiwalikD) Lower Himalayas​

C) Both d) None of theseThe efficiency of diesel engine is about:a) 50% to 60%b) 25% to 30%c) 35% to 40%d) 40% to 50%. The efficiency of petrol engine is about:o​

5.14) જો સ્વાધ્યાય 5.13 ના ગજિયા ચુંબકને 180° જેટલો ઘુમાવવામાં આવે તો હવે નવા તટસ્થ બિંદુઓ ક્યાં (કેટલા​

Two small pillars,each of cross se​

1. Carnot cycle is:a) Reversibleb) Irreversiblec) Bothd) None of these​

7. The centre of sphere to which a spherical mirror is a part is called 1) centre of curvature2) pole3) Focus4) focal length​

If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V at point ( 1,-1,1) .If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V a point ( 1,-1,1) .​

8. What produces NIC D 9. Name A,B,C,D,E and F in the following diagram showingchange in its stateIncrease heat anddecrease pressureEABGASSOLIDLIQUIDСDFDecrease heat andincrease pressureSCIENCE​

The internal resistance of the milliammeter must be very low for Select one:a. High sensitivityb. High accuracyc. Maximum voltage drop across the meterd. Minimum effect on the current in the circuit​

Flow much charge flows through a wire in 10 minutes of the current​

calculate the angle between two vector p=3i^-j^+4k^ and q=i^+j^-6k^.also find the projection of p on q​

In physics When heat is added to the system, the entropy change is:a) Positiveb) Negativec) Zerod) None​

20. Three LED bulbs of & Weach, Five fans of 40 W cach, an electric motor of 3 kW, and a geyserof ô KW ase used for 5 hours per day by a family.Calculate the cost of electricity used in 30 day atthe rate of 5/- per unit.O69107-O6918 V-O 6920 /-O none of these​

The ratio of limiting friction and normal reaction ​

Find the refractive Index of rarer medium if the denser medium is 45°​

The magnetic field inside a long straight solenoid carrying current Select one:a. Decreases as we move towards its endb. Increases as we move towards its endc. Is zerod. Is the same at all points​

The shadow of a tree in an open field will be the smallest in size during- 1- early morning2- midday​

Differentiate between the convex eye lens and ordinary convex lens please dont spam.the correct answer will be marked brainliest with a thank you and vote 5​

1. Static electricity always develops on a. Conductorb. insulatorc.none of thesed.both a and b​

An 8 kg block initially at rest is pulled to the right...​

19. An electric bulb rated at 60W and a fan rated 15 W is connected to the mains supply. Find theamount of electrical energy consumed by thebulb in 25 days if the bulb is switched on for 8hours daily.20 kWO 15 kWO 25 kWO 22 kW​

A weighting 9800 N is moving at 25 m/s. If the frictional forceacting on it is 2000 N.how fast the car moving when it has travelled 60 m​

6 Geocentric model i.e. the Earth is the orbital centre of all celestial bodies was proposed by ​

State and prove a) principle of parallel axes b) principle of perpendicular axes​

A body with an initial velocity of 18km.hr accelerates uniformly at the rate of 9cm/s over a distance of 200m , calculate acceleration in m/s and final velocity in m/s

If an electroscope is charged by induction, it acquires​

Write the Mayer's relation​

The a TV of rating 100w is operated for 6 hours per day. find the number of units consumed in any leap year. (solve).​

A bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus. AND ANSWER IS 0.8seconds

What is Speed ?????????????

Express escape velocity in terms of g and R

A vector =2i-j+k,B vector=i-j find theta?

As as gemma cupes(i) In gymnosperm, sporangia are borne in sporophylls which are arranged spirally in a compact axisknown as

a bus is moving with a velocity of 30km/h. on applying the brakes it stops at a distance of 10m. calculate the time taken to stop the bus.

The distance between pole and focus is1) pole2) focus3) focal length4) centre

A body having light energy of its own feetनथिंग

two resistors of 5 ohms and 3 ohms respectively are connected in parallel wirh a 15 ohm resistor in series. A 6 Volt pd is applied across this circuit. find the current flowing through the 3 ohm resistor?

The energy is neither created nor destroyed in a system , or is know asटिक द करेक्ट ऑप्शन

The gravitational force between two particles separated by a distance r varies as_____ A)1/rB) rC)r^2D)1/r^2

9. The unit of entropy is:a) JKb)Kc)Ilthyd)

Explain suitability of different basalts for tunneling?

D) TiI, T₂8. Working cycle of a typical petrol engineconsists of:a) Two strokesb) Four strokesc) Six strokesd) Eight strokesThe unit of entrony is.

Which of the following rays are not electromagnetic wavesSelect one:a. Gamma raysb. Heat raysO c. Beta raysd. X rays

27. The efficiency of a Carnot engine betwe HTR at T, and LTR at T2 is given by:a) 1T1 -T.b) T-TITTTI-TTd)Ti-T2.T

planet P has an orbital radius that is twice that of planets you both revolving around the star if the mass of planetP is also twice that of planetQ you then find the ratio of the force of gravitation between planet p and the star and planetq and the star

The Potwar Plateau is in _______ range. A) HimachalB) HimadriC) ShiwalikD) Lower Himalayas

C) Both d) None of theseThe efficiency of diesel engine is about:a) 50% to 60%b) 25% to 30%c) 35% to 40%d) 40% to 50%. The efficiency of petrol engine is about:o

5.14) જો સ્વાધ્યાય 5.13 ના ગજિયા ચુંબકને 180° જેટલો ઘુમાવવામાં આવે તો હવે નવા તટસ્થ બિંદુઓ ક્યાં (કેટલા

Two small pillars,each of cross se

1. Carnot cycle is:a) Reversibleb) Irreversiblec) Bothd) None of these

7. The centre of sphere to which a spherical mirror is a part is called 1) centre of curvature2) pole3) Focus4) focal length

If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V at point ( 1,-1,1) .If vector V = x^2 z i -2y^3 z^2 j + x y^2 z k . Find out the value of div V a point ( 1,-1,1) .

8. What produces NIC D 9. Name A,B,C,D,E and F in the following diagram showingchange in its stateIncrease heat anddecrease pressureEABGASSOLIDLIQUIDСDFDecrease heat andincrease pressureSCIENCE

The internal resistance of the milliammeter must be very low for Select one:a. High sensitivityb. High accuracyc. Maximum voltage drop across the meterd. Minimum effect on the current in the circuit

Flow much charge flows through a wire in 10 minutes of the current

calculate the angle between two vector p=3i^-j^+4k^ and q=i^+j^-6k^.also find the projection of p on q

In physics When heat is added to the system, the entropy change is:a) Positiveb) Negativec) Zerod) None

20. Three LED bulbs of & Weach, Five fans of 40 W cach, an electric motor of 3 kW, and a geyserof ô KW ase used for 5 hours per day by a family.Calculate the cost of electricity used in 30 day atthe rate of 5/- per unit.O69107-O6918 V-O 6920 /-O none of these

The ratio of limiting friction and normal reaction

Find the refractive Index of rarer medium if the denser medium is 45°

The magnetic field inside a long straight solenoid carrying current Select one:a. Decreases as we move towards its endb. Increases as we move towards its endc. Is zerod. Is the same at all points

The shadow of a tree in an open field will be the smallest in size during- 1- early morning2- midday

Differentiate between the convex eye lens and ordinary convex lens please dont spam.the correct answer will be marked brainliest with a thank you and vote 5

1. Static electricity always develops on a. Conductorb. insulatorc.none of thesed.both a and b

An 8 kg block initially at rest is pulled to the right...

19. An electric bulb rated at 60W and a fan rated 15 W is connected to the mains supply. Find theamount of electrical energy consumed by thebulb in 25 days if the bulb is switched on for 8hours daily.20 kWO 15 kWO 25 kWO 22 kW

A weighting 9800 N is moving at 25 m/s. If the frictional forceacting on it is 2000 N.how fast the car moving when it has travelled 60 m

6 Geocentric model i.e. the Earth is the orbital centre of all celestial bodies was proposed by

State and prove a) principle of parallel axes b) principle of perpendicular axes

If an electroscope is charged by induction, it acquires

Write the Mayer's relation

The a TV of rating 100w is operated for 6 hours per day. find the number of units consumed in any leap year. (solve).