Showing posts with label physics mcqs. Show all posts
Showing posts with label physics mcqs. Show all posts

Saturday, 14 February 2015

ETEA SOLVED PAPERS chapter wise ( free download,) 2005 to 2013

 Download chapter wise physics, chemistry ,biology and maths pre engineering and pre medical EATA SOLVED  papers of 2005 to 2013  for free, Any one interested just click on the link , Now you do not need to pay for it , Murad ali shah UET peshawar 

Chapter-1(physics)

1. The present SI unit of time is defined as:
Duration of 9,192,631,770 vibration of Ce-133 atom (2008-97 ETEA).
Extra Point:
Present unit of length = s travelled in vacuum during a time of second.

2. The force of one Newton per meter square is equal to one.
(a) Bar (b) Atm (c) Pascal (d) Erg. (2005-80)
* Newton = Kgms2 * J = Nm = Kgm2s-2
* Watt = w = Js-1 = Kgm2s-3 * C = As
* Volt = V = JA-1 s-1 * Pa = Nm-2 = Kgm-1 s-2
* Which of the following is unit of P? (2013-176)
Kgm-1 S-2 Hints

3. If the area of a circle is equal, to its circumference the radius of this circle is
(a) 1 (b) 2 (c) 3 (d) 4 2005-41
Hints r2 = 2 =2

4. 9.5 × 1015m when rounded off 40 is 1016 m which is equal to (2011-03 Eng ETEA)
(a) Tera meter (b) Peta meter (c) Exa meter (d) light year
* Tera 1012 * Exa = 1018 * light year = 9.5 × 1015 m
* {eta = 1015

5. What is the ratio of 1 Gm/1um? (2012-78) Eng: ETEA
(a) 10-3 (b) 10-7 (c) 10-18 (d) 1015
1Gm Gega meter = 109µm = micro meter = 10-6
Thus 1Gm/1um = = 109 × 106 = 1015
Extra Points:
  1. Atto → 10-18
  2. Femto → 10-15
  3. Pico → 10-12
  4. nano→ 10-9
  5. micro → 10-6
  1. milli→ 10-3
  2. Centi → 10-2
  3. Deci → 10-1
  4. Deca → 101
  5. Kilo → 10-3
  1. Mega → 106
  2. Gega → 109
  3. Tera → 1012
  4. Peta → 1015
  5. Exa → 1018

6. A student measures a current as 0.5A.
Which of the following correctly express this result,
(a) 50mA (b) 50MA (c) 500MA (d) 500mA

7. If a machine does 550 foat Pound work in one second its power will be.
(a) 550 watt (b) 74 6 watt (c) 746 horse power (d) 550 horse power
As (*) 1 horse power = 746 watt= 550 foot prund / sec.
* 1 inch = 2.54 cm (*) 1 pound force = 4.448N
* 1 inh = 1.609 Km(*) 1m = 3.281 gty
* 1 slug = 14.59 kg = 32.2 lb (8) 1 foot = 0.305 m
* In = 0.225 pound force
* 1 watt = 0.737 foo pound/

8. The measurement of physical quantity may be subject to random errors & to systematic errors. Which statement s correct (*) Rondom error can be reduced by taking the average of several mesurements.

9. A presise measurement is one which has;
(a) Less uncertainty (b)Max precision (c) Absolute precision (d) None of these

10. The quantity x is to be determined form the equation x = p-Q. P is measured as (1.27 + 0.02)m and Q is measured as (0.03 + 0.01)m. What is the percentage uncertainty in x to one significant sigure.
(a) 4% (b) 2% (c) 3% (d) 7%

11. The deusity of the steel ball was determined by measuring the mass and diameter. The mass was measured with 1% and diameter 3% of the error. In the calculated density of the steel ball is at most.
(a) 2% (b) 4% (c) 8% (d) 10%

12. The power loss, P in resistor is calculated using the formula P = V2/R. The uncertainty in the potential difference V is 3% and the uncertainty in the resistance R is 2%, what is the uncertainty in P? 2012-51 Eng: ETEA
Hints: P =
(a) 4% (b) 7% (c) 8% (d) 11%

13. The uncertainty recorded in the redius of a sphere is 1.6%. The uncertainty in the area of that sphere is; 2012-61 ETEA
Hints: Area of sphere = 4r2 => Thus uncertainty in area = (1.6%)2 = 1.6% × 2 = 3.2%
(a) 4.8% (b) 3.2% (c) 1.6% (d) 0.8%

14. The number of signfiicant figures in 4.0030 is; 2009-77 ETEA
(a) Four (b) Five (c) Two (d) Three

15. The nubmer of signficiant figures in the measurement x = 10.00300 2012-90 ETEA
(a) 7 (b) 8 (c) 5 (d) 3

16. The number of signfiicant figures in the measurement of 5.05 10-3 m/s is;
2008-177 ETEA
(a) 2 (b) 3 (c) 4 (d) 8
Rules of significant figures
  1. All non-zero are significant
  2. Decimal point between them does not matter
  3. All zero between two non-zero are significant.
  4. Location of decimal does not matter
  5. If a number is with out decimal
  6. Part, than terminal zeros are not significant.
  7. Terminal are trailing zeros in the decimal part are significant.
  8. Any zero to the right of a not-zero digit is significant.
  9. All zero between decimal point & first non-zero digit are not significant.
0.0003 → one signficiant
34000 → Twosignficiant
97600 → 5signficiant

17. If 7.635 & 4.81 are two significant numbers, their multiplication in significant digit is 2011-6 Eng: ETEA
Hints: 7.635 × 4.81 = 36.7 B/c Answer should be carried to least significant figure operation i.e. 4.81
(a) 36.72435 (b) 36.724 (c) 36.72 (d) 36.7
In multiplication & division the operation is carried to same nubmer of significant figures that are contained in the foctor which has the least number of significant figures.
e.g.; 4.3458 2.7 = 11.73366
Answer after rounding off: (12) because 2.7 has only two significnat figures.
In adding & subtracting numbers the decimal places retained in the answer should equal the smallest number of decimal places, in any of the quantity being added or substracted.
e.g. 2.1 + 2.123 + 10.1 → 6.233 → 6.2 Ans.
& 9.725 – 4.04 → 5.685 → 5.68

18. The dimension of planks const court are: 2010-39 Eng: ETEA

19. The Dimension of work are similar to the dimensions of 2010-39 Eng: ETEA
(a) Impulse (b) Torque (c) Power (d) Angular momentum.
* Impulse → Momentum (Same dimension)
* Torque → Energy → Work → Heat (Same Timension)
* Augularmonientum → plank’s const I =ML2 T-1

20. ML-1 T-1are dimensions of; 2011-58 ETEA
(a) Augular Momentum (b) Power (c) Impulse (d) Viscosity

21. The dimension of energy are same as those of; 2011-135 ETEA
––> Work

22. The dimension of gravitational const are M-1 L3 T-2

23. The diminsion of torque are; 2008-183, 2012-22 Eng: ETEA
––> ML2 T-2

24. The dimension of impulse are similar to momentum 2010-62 Eng: ETEA
––>T-2

25. The dimension of angular acceleration are

26. Plank’s const has the dimension of angular momentum, 2009-111 Med: ETEA

27. M0 L0 T0are the dimension of 2011-05 ETEA
(a) Strain (b) Regractive Index (c) Magnification (d) All

28. The time rate change of magnetic flux has dimension as that of; potential difference 2012-42

29. Which of the following pairs have same units of dimensions? 2012-182 ETEA
Enf & Potential difference
B.A/t = Potential diff: Emf = ML2 T-3 A-1 Same Dimensions

30. Which one is correct formula for finding the speed, V of orean waves in terms of the deusity, p of sea water, the acc of free fall g, depth, h of the ocean & the wavelength x? 2012-50 Eng: ETEA
(a) v = (b) v = (c) v = (d) v =
v = = = = = m/s = Velocity  

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