SENIOR ELEMENTARY TEACHER SET PAST PAPERS AND SYLLABUS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
دو پوائنٹس کے درمیان ایک کنڈکٹر کے ذریعے کرنٹ دو پوائنٹس کے وولٹیج کے براہ راست متناسب ہے، اسے کیا کہا جاتا ہے؟
Ohm’s law
Kirchhoff’s 2nd law
Kirchhoff’s 1st law
None of these
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Explanation
Ohm's law, description of the relationship between current, voltage, and resistance. Georg Simon Ohm stated that the electric current through a conductor is directly proportional to the voltage across it , provided temperature remains constant. This relationship is called Ohm’s Law . Last verified on 22-05-2026
کولمب کا قانون ______ کہتا ہے؟
Force between two point charges is directly proportional to the sum of the charges and inversely proportional to the square of the distance between them
Force between two point charges is directly proportional to the product of the charges and the square of the distance between them
Force between two point charges is inversely proportional to the product of the charges and directly proportional to the square of the distance between them
Force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them
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Explanation
Coulomb's Law states that the magnitude of the electrostatic force (F) between two point charges (q1 and q2) is directly proportional to the product of the charges and inversely proportional to the square of the distance (r) between them. Mathematically, this is expressed as: F ∝ (q1 × q2) / r². This law describes the relationship between electric charges and the force they exert on each other. Last verified on 22-05-2026
آئسو بارک عمل میں جب ایک مثالی گیس کو حرارت دی جاتی ہے تو کیا ہوتا ہے؟
Pressure decreases
Temperature becomes zero
Volume increases
None of these
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Explanation
In an isobaric process , pressure remains constant throughout the process. When heat is supplied to an ideal gas , its temperature rises. According to gas laws , increase in temperature at constant pressure increases volume . This relationship is explained by Charles’s Law. Last verified on 22-05-2026
ایک بھیڑیا ایک ماحولیاتی نظام میں داخل ہوتا ہے، جس سے سبزی خور کی تعداد کم ہو جاتی ہے اور پودوں دوبارہ بڑھنے لگتی ہے۔ یہ کس چیز کی مثال ہے؟
Competition
Symbiosis
Trophic cascade
None of these
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Explanation
A trophic cascade is an ecological process where changes at the top of the food chain affect multiple lower levels. In this case, the wolf (top predator) reduces herbivore population. With fewer herbivores, plants and vegetation recover and grow. It shows how predators control ecosystem balance. It is an example of top-down regulation in ecology. Last verified on 21-05-2026
ریشم کے کیڑے میں پیبرائن کی بیماری کس روگجن کی وجہ سے ہوتی ہے؟
Bacillus thuringiensis
Nosema bombycis
Salmonella typhi
None of these
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Explanation
Pebrine is a dangerous disease of silkworms . It is caused by a microscopic protozoan parasite named Nosema bombycis . It affects growth, reproduction, and silk production . The infection can spread from infected moths to eggs . It is one of the major diseases in sericulture . Last verified on 21-05-2026
درجہ بندی کا باپ کس کو کہا جاتا ہے؟
Edward Jenner
Alexander Fleming
Louis Pasteur
Carolus Linnaeus
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Explanation
Carl Linnaeus is known as the Father of Biological Classification (Taxonomy). He introduced the binomial nomenclature system (two-name system). This system gives every organism a Genus and Species name. It made classification of living organisms systematic and universal. His work is the foundation of modern taxonomy . Last verified on 21-05-2026
ہاتھی کے حمل کی مدت تقریباً کتنی ہوتی ہے؟
9–12 months
12–15 months
18–22 months
None of these
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Explanation
Gestation period means the time an animal carries a baby in the womb. Elephants have the longest gestation period among land mammals. It lasts approximately 18 to 22 months (about 1.5 to 2 years). This long period allows proper development of the calf. Usually, elephants give birth to a single calf. Last verified on 21-05-2026
لعاب میں موجود امیلیز کا بہترین پی ایچ تقریباً کیا ہوتا ہے؟
2.0 – 3.0
4.5 – 5.5
6.8 – 7.0
None of these
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Explanation
Salivary amylase works best in a neutral pH environment. The mouth provides a slightly neutral condition (~6.8–7.0). At this pH, starch digestion begins efficiently in the oral cavity. Last verified on 21-05-2026
ریشم کے کیڑے کی پیبرائن بیماری کس وجہ سے ہوتی ہے؟
Bacteria
Virus
Protozoa
None of these
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Explanation
Pebrine is a serious disease of silkworms . It is caused by a microscopic parasite called a protozoan . This disease spreads quickly and affects silk production badly. Infected silkworms show weak growth and dark spots on the body. It can be transmitted from infected eggs to new generations . Last verified on 21-05-2026
ریشم کا کیڑا کس فیلم سے تعلق رکھتا ہے؟
Mollusca
Arthropoda
Annelida
None of these
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Explanation
Silkworm is the larval stage of the silk moth. It belongs to the phylum Arthropoda , which includes insects . Arthropods have a segmented body, exoskeleton, and jointed legs. Silkworm is scientifically known for producing natural silk . It is widely used in sericulture (silk farming). Last verified on 21-05-2026
