SST MATH PHYSICS PAST PAPER 2018 TO 2025
SST 5 years Past Papers Click Here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
جب نائٹروجن پر الفا ذرہ سے بمباری کی جاتی ہے تو ، مصنوعات کیا ہیں؟
- Oxygen and Proton
- Hydrogen and Carbon
- Oxygen and Neutron
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
When a nitrogen nucleus is hit by an alpha particle, it can produce oxygen and a proton.
This was observed in early nuclear reactions, such as Rutherford's experiment.
- 30°
- 60°
- 90°
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
According to the law of reflection, angle of incidence = angle of reflection.
So, if light strikes at 30°, it reflects at 30°.
- 0.3010
- 1.0986
- 3
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
ln3 means the natural logarithm of 3 (log base e).
Its approximate value is 1.0986.
- 1.2 × 10⁶ W
- 1.2 × 10⁴ W
- 1.2 × 10² W
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Jet engines typically produce very high power, often in the megawatt (MW) range.
1.2 × 10⁶ watts equals 1.2 megawatts, which is appropriate for a jet engine.
- Whisper
- Yell
- Cry softly
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Shout means بولنے یا زور سے کال کرنے کے لئے
Yell means بولنے یا زور سے کال کرنے کے لئے
- r1 × r2 = C1C2
- r1 + r2 = C1C2
- r1 - r2 = C1C2
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
When two circles touch each other externally, they have a single point of contact.
The distance between their centers (C1C2) is equal to the sum of their radii (r1 + r2).
- Force and displacement are in opposite directions
- Force and displacement are in the same direction
- Force and displacement are perpendicular
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Work done = F × d × cos(θ); when angle θ = 180°, cos(180°) = -1.
So, if force and displacement are antiparallel (opposite), the work is negative.
- He told his mother that he will come home early that night.
- He told his mother that he would come home early that night.
- He said to his mother that he would come home early this night.
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
He told his mother that he would come home early that night."Said to" changes to "told" in indirect speech."Will" changes to "would" in reported speech.
"This night" changes to "that night" as per time expressions in indirect speech.
- Main verb
- Helping verb
- Both A and B
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
"Do" works as a main verb (e.g., "I do my work") and also as a helping verb (e.g., "Do you understand?").
Its function changes based on how it is used in the sentence.
- After washing face I look at myself in mirror.
- After washed face I look myself in the mirror.
- After washing my face, I look at myself in the mirror.
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The phrase "washing my face" uses the correct possessive form "my."
The article "the" is necessary before "mirror" to make the sentence grammatically correct.
