SPSC 25 YEARS PAST PAPERS 2001 TO 2026
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
لاکٹ کی مدت اس کے _____ کے ذریعہ طے کی جاتی ہے؟
Amplitude
Mass
Length
None of these
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Explanation
The period of a simple pendulum is directly proportional to the square root of its length (T ∝ √L). Mass and amplitude do not affect the period in an ideal simple pendulum.
مندرجہ ذیل میں سے کون سا پروجیکشن زاویے کا نتیجہ سب سے بڑی حد میں ہوگا؟
20°
45°
60°
None of these
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Explanation
The maximum range in projectile motion occurs at a launch angle of 45° , assuming no air resistance. At this angle, the horizontal and vertical components of velocity are optimally balanced , leading to the greatest distance covered.
وہ مادہ جو عملی طور پر کسی لچکدار کو ظاہر کرتا ہے وہ _____ ہے؟
Rubber
Copper
Quartz
None of these
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Explanation
Quartz exhibits almost no elastic after-effect. This meaning it quickly returns to its original shape after deformation. Rubber and silk exhibit significant elastic after-effects. This meaning they take time to return to their original form.
اگر زمین گھومنے سے رک جاتی ہے تو ، کسی بھی قطب پر اشیاء کا وزن ______ ہوگا؟
Vary with latitude
Be less
Be greater
None of these
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Explanation
When Earth rotates , there is a centrifugal force that slightly reduces the effective gravitational force, especially at the equator. If the Earth stopped rotating , this centrifugal effect would disappear . It causing the weight of objects to increase , particularly at the poles where the effect of rotation is minimal.
کشش ثقل کے بڑے پیمانے پر اندرونی بڑے پیمانے پر تناسب ______ کے برابر ہے؟
1
2
3
None of these
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Explanation
Inertial mass measures an object's resistance to acceleration when a force is applied. Gravitational mass determines the strength of the gravitational force acting on an object. According to the equivalence principle , inertial mass and gravitational mass are always equal , making their ratio 1 .
غیر مساوی قوتوں کی کم سے کم تعداد کیا ہوگی جس کی رقم صفر کے برابر ہوسکتی ہے؟
1
2
3
None of these
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Explanation
To achieve a zero resultant force, at least three unequal forces are required to form a closed triangle in vector addition. Two unequal forces cannot cancel each other unless they are equal in magnitude but opposite in direction.
فوٹو الیکٹرک سیل میں ، خارج ہونے والے الیکٹران کو خارج کرنے کی رفتار _______ پر منحصر ہے؟
Work function of the metal
Frequency of the incident light
Intensity of the incident light
None of these
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Explanation
The kinetic energy of ejected electrons depends on the frequency of the incident light, as per Einstein’s photoelectric equation : K E = h f − ϕ KE = hf - phi where h h is Planck’s constant, f f is frequency, and ϕ phi is the work function. Intensity affects the number of emitted electrons but not their velocity.
مقناطیسی میدان میں منتقل ہونے والے چارج پر کام کرنے والی طاقت کا انحصار _____ نہیں ہوگا؟
Intensity of the magnetic field
Its mass
Amount of charge
None of these
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Explanation
The magnetic force on a moving charge is given by F = qvB sinθ , where q is the charge, v is velocity, and B is the magnetic field intensity. Mass (m) does not appear in this equation , so the force is independent of the charge's mass.
0.25%
2%
1%
None of these
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Explanation
Power in an electric bulb is given by P = I²R .If the current I decreases by 0.5% , then power decreases by (0.5 × 2) = 1% because power depends on the square of current.
40 W
30 W
90 W
None of these
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Explanation
When four equal resistors are connected in series, the total resistance (R_total) is:
R_total = 4R
The power dissipated (P) is:
P = V² / R_total
Given P = 10 W, we can rewrite the equation as:
10 = V² / (4R)
Now, if one resistor is connected across the same battery, the power dissipated (P') will be:
P' = V² / R
Comparing the two equations, we can see that:
P' = 4P
= 4 × 10 W
= 40 W
