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GuessPaper – 2010 Class – X
Subject –Physics
Q.1. Define:-
Machine, Machnical advantage, Velocity ratio,
Efficiency
Q.2.
Explain the principle of machines.
Q.3
No machine is ideal. Why?Q.4. Define the relationship between
MA , velocity ratio and Efficiency?
Q.5.
MA is always less than velocity ratio .Why?
Q.6.
Give two examples of each and also draw a diagram?
1. I class
2. II class
3 .III class
Q.7.
Which class of lever has MA greater than one?
Q.8
Derive the M.A. of inclined plane.
Q.9.
Draw a neat labeled diagram of block and tackle system having
MA= 4.
Q10.
Single Movable pulley is always used with a Fixed pulley. Why?
Q11.
Why is efficiency of a pulley always less than one and what
should be done Increase its efficiency?
Refraction of Light
Define:
Q.(1) Refration, Refractive Index, Lateral displacement,
Angle of deviation, Critical angle, Total Internal reflection
Q.(2) What is cause of refraction?
Q.(3) Prove that :-
Q.(4) What are the factors which effect the refractive index
of the medium?
Q(4) Scholar’s tutorial,Gauriyamath rd, Mithapuer ,Patna-
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Q.(5) What are the factors which effect lateral displacement?
Q.(6) Explain with diagram refraction through a glass lab
showing all the terms?
Q.(7) During reflection through thick mirror multiple images
are formed which of the Image us brigthest and Why? Explain
with diagram?
Q (8) What are the factors which effect the angle of
deviation during refraction through a prism?
Q (9) Explain the variation of angle of deviation with change
in angle of Incidence?
Q(10) In which condition the angle of Incidence equal to
angle of emergence ? With Diagram?
Q(11) How can refraction Index be found out with the help of
real depth and apparent depth?
Q(12) What are the factors which affect the Critical angle?
Q(13) What is T.I.R ? Explain with diagram?
Q(14) What are the Condition for T.I.R ?
Q(15) Explain how prism is used with diagram:-
1.
For deviation through 90
2.
For deviation through 180
3.
For erecting prism
Q(16) Why does diamond sparkles?
Q(17) What is optical fibre? Explain with diagram?
Q(18) A person sitting infront of camfire finds the face of
person sitting on the opposite side Shimmering. Why
Refraction through lens:-
Q(1) Explain why convex lens shows converging action and
convex lens show diverging action with diagram?
Q(2) Light ray posses undeviated through optical centre,
explain with diagram?
Q(3) If the medium is different on both side of the convex
lens them how will the first and second focal length differ?
Q(4) If a part of lens is covered how will:-
1.
focal length differ
2.
Intensity of image differ
3.
Image differ
Q(5) Explain with ray diagram working of microscope. Write the
formula for its magnification?
Q(6) Find the power of concaves lens of focal length 25 cm.
Q(7) What is the unit of power?
Q(8) Name the lens use for correcting short sightedness and
the lens used for correcting long sightedness?
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Spectrum and Colours:-
Q(1) Explain angle of deviation with the help of neat diagram?
Q(2) Draw neat diagram showing dispersion and spectrum ?
Q(3) Write any two uses and also two properties:-
Radio waves, Micro waves, Infra radiation, Ultra
violet, x rays, Gamma rays
Sound:-
Q(1) Define:
Echo, Reverberation, Resonance
Q(2) What are the condition for the formation of echo?
Q(3) The minimum distance for hearing an echo is 17m. Explain
Q(4) How do Bats use the principle of echo?
Q(4) Scholar’s tutorial,Gauriyamath rd, Mithapuer ,Patna-
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Q(5) What is SONAR?
Q(6) Differentiate between free and damped vibrations with the
help of graph diagram?
Q(7) What are the conditions for resonance to occur?
Q(8) How does resonance helps in transmission of satellite
channels?
Q(9) Name of the device used for converting sound signal into
visual signal?
Q(10) Define intensity?
Q(11) What are the factors which effects loudness of sound?
Q(12) Differentiate between two sound wave with the help
diagram on the basics of:-
i)
Loudness ii) Quality iii) Pitch
Q(13) Differentiate between Musical sound and Noise?
Q(14) Unit of loudness and define it?
Q(15) Give two examples of Resonance?
Q(16) Explain the statement :-
1.
Subjective nature of loudness and objective nature of
Intensity.
2.
Subjective nature of pitch and objective nature of frequency.
Electricity
Q1. Define:-
Current, Potential difference, Resistance, 1Ampere, E.m.f.,
One volt, Internal Resistance, Resistivity
Q(2) What are the factors which effects the following:-
1.
Resistance
2.
Resistivity
3.
Internal Resistance
Q(3) 1. State Ohm’s law?
2.What are limitation of ohm’s law ?
3. Draw the graph of ohm’s slaw?
4. What does the slope of V-I graph repersent?
5. What does the slope of I-V graph represent?.
Q(4) Differntiate between ohmic and Non ohmic Conductors? And
also draw graph for each?
Q(5) How can one ohm be defined?
Q(6). i) What will happens to the resistance of a wire
its area is double and length decreased by four times
ii) What will happens to the resistance of a wire
if it radius tripled and length decreased to half of its
original length?
Q(7) Name an element whose resistance increases with the
decrease in temperature?
Q(8) Differentiate between E.m.f and terminal voltage?
Q(9). With the help of diagram show the movement of electron
and direction of current between oppositely charged body.
House Hold Electricity
Q1. Conversion of energy form one form to another ?
Q2. Define:- One unit?
Q3. Write factors on which the heat produced in a conductor
depends?
Q4. The voltage is increased before power transmission through
long distance?
Q5. Function of main fuse?
Q6. Why is double pole switch or dual switch used as at main
switch?
Q7. Diagram of tree system?
Q8. Disadvantage of tree system?
Q9. Diagram of ring system?
Q10. Advantage of ring system?
Q11. Light and other output points are connected in
parallel?Why?
Q12. Define fuse
Q13. Write material used in fused wire?
Q14. Fuse is always connected to live wire ? Why?
Q15. Explain dual contral switch with neat diagram?
Q16. Why switch is connected to live wire ?
Q17. What will happened if earthing us done with out fuse or
what will happen if fuse if connected to neutral while
earthing?
Q18. Why is earth pin long and thick in three pin plug?
Q19. What are high tension wire?
Electro- Magnetism
Q1.
Draw magnetic line of force in straight current carrying
conductor?
Q2.
Draw magnetic line of force in a loop Carrying Current?
Q3
What is solenoid? Draw a solenoid showing magnetic lines of
force around it?
Q4.
How can you increase the strength of solenoid ?
Q(4) Scholar’s tutorial,Gauriyamath rd, Mithapuer ,Patna-
9304303600
Q5.
How can you increase the strength of electromagnet?
Q6.
Why is electro magnet preffered over parmanet magnet?
Q7.
Draw a neat label diagram of an electric bell?
Q8.
What is the unit of magnetic field?
Q9.
With reference to Dc motor:-
1.
State the principle
2.
State the change of energy
3.
Draw a neat label Diagram
4.
Name the law used for finding the direction of motion?
5.
What is the use of split ring?
6.
What is the use of Brushes.Compiled by –Er.ratnesh-
7.
How can you Increase the speed of rotation?
8.
When the force experienced by the coil maximum?
Q10.
What is electro magnetic Induction?
Q11.
With reference to AC generator:-
1.
State the principle
2.
State the change of energy?
3.
Draw the diagram?
4.
Name the law used for finding the Induced current?
5.
What is function of slip rings.
6.
Draw a graph Showing Variation of E.m.f. with rotation.
7.
How can increase the magnitude of Induced current?
Q12. With reference to Transformer:-
1.
State the principle
2.
What is turn ratio?
3.
For set up trans former turn ratio is ----
4.
For set down transformer trun ratio is---
8.
What are the different kind of energy losses in a transformer?
9.
In
step up transformer primary wire is made thick and secondary
wire made then why?
Calorimetry
Q1. Define:-
One calorie, Heat capacity, Specicic heat capacity, Specfic
latent heat.
Q2.
What is the relationship between heat capacity and specific
heat capacity.
Q3.
What is the S.I. Unit of specific heat capacity?
Q4.
A calorimeter is made up of thin copper sheet. Why?
Q5.
Water is used as a coolant in car radiators. Why?
Q6.
The base of an electric kettle is generally made thick? Why?
Q7.
What do you mean by the statement the specific heat of
Vaporisation of water is 2268 J per g.
Q8.
What do you mean by the statement the specific latent heat of
fusion of Ice is 336 J per g.
Q9.
a)
The graph repesents heating curved of Ice form- 10’ c to 100’
c and above.
b)
What does the region AB and CD represent ?
c)
Why does the temperature constant during AB and CD?
d)
What is the state of H2O at point between C and D?
e)
Why is the length of CD is greater than AB?
f)
What is the ratio of length AB and CD?
Q10.
Drinks get cooled more Quickly by adding piece of Ice at 0’c
than the Ice-cold water at 0’c. Why?
Q11.
What happens when the Ice in a frozen lake starts melting?
Q12.
Steam at 100’C causes more severe burns than boiling water,
both being at the same temperature . Why?
Q13.
Steam is used fan for running trains or machines . Why?
Q14.
In cold countries, steam pipes are used for heating the
buildings more effectively, than the hot water pipes at 100’c
. Why?
Q15.
What is the effect of Impurity on:-
i) Melting point of solid ii)Boiling
point of a liquid
Thermionic emission,and Radioactivity
Q1. Define:-
Thermionic emission . Work junction or Threshold energy
Q2.
What are the factors which effect the rate of themionic
emission?
Q3.
What are the requirement of a good electron emitter?
Q4.
Name a metal most suitable for emission of electron?
Q5.
With reference to cathode ray tube:-
1. Principle of working?
2. Function of grid?
3. Function of Anode?
4. Why is anode connected to high tension positive
Charge?
5. What is the function of deflecting system ?
6. Name the chemical used in fluorescent screen?
7. Fluorescent screen?
8. Differentiate between:- Deflection due to
electric field and Deflection due to Magnetic field?
Q6.
Give two examples of Isotopes and Isobars.
Q7
Define radioactivity?
Identify X, Y and Z
What is the change in x, y, b.
The deflection in z is more than x
Write two uses and two properties of x,y,z. each.
Q9.
Write the uses of radio Isotopes.
Q10.What
is Background Radiations and what are its Sources?
Q11.Complete
the nuclear change :- on Alpha, Beta and Gamma Emission.
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