UAF ENTRY TEST PAST PAPER 09-07-2023
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- 1.6 x 10⁻²⁷
- 2.6 x 10⁻⁸
- 2.88 x 10⁻¹¹
- None of these
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Explanation
Given the formula and calculation:
F = qE
= (1.6 × 10⁻¹⁹ C) × (1.8 × 10⁻⁸ N/C)
= 2.88 × 10⁻¹¹ N
- V/C
- V/m
- V/A
- None of these
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Explanation
Electric field intensity is defined as force per unit charge (N/C) or potential difference per unit distance (V/m).
So, V/m is an equivalent.
It is commonly used unit for electric field intensity.
اصطلاح "آر سی" میں _______ کی طرح یونٹ ہے؟
- Energy
- Capacitance
- Time
- None of these
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Explanation
The product RC (Resistance × Capacitance) gives the time constant in an RC circuit.
Its unit is Ohm × Farad = seconds (s), which is the unit of time.
بجلی کے فیلڈ کی توانائی کی کثافت کا ایس آئی یونٹ ______ ہے؟
- J/m²
- J/C
- J/m³
- None of these
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Explanation
Energy density is defined as energy per unit volume, so the SI unit is joules per cubic meter (J/m³).
It applies to electric fields where
𝑢 = 1/2𝜀𝐸², with 𝑢 being energy density.
چکروسیس اور امیبوڈ حرکت _______ کی وجہ سے ہیں؟
- Centrioles
- Microfilaments
- Intermediate filaments
- None of these
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Explanation
Microfilaments (mainly made of actin) are responsible for cell movements like cyclosis (cytoplasmic streaming) and amoeboid movement.
They help in changing cell shape, enabling movement in amoebas and streaming in plant cells.
- Micro Molecules
- Carbohydrates
- Micro Molecules
- None of these
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Explanation
Starch is a type of polysaccharide, which falls under the category of carbohydrates.
It is a complex carbohydrate made up of many glucose units and serves as an energy storage molecule in plants.
سوڈیم اور کلورین میں جسمانی بڑے پیمانے پر کتنا ہوتا ہے؟
- 0.45%
- 0.08%
- 0.30%
- None of these
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Explanation
Sodium (Na) and Chlorine (Cl) together make up about 0.45% of the human body mass.
They are essential electrolytes that help regulate fluid balance, nerve function, and muscle activity.
جسم میں نائٹروجن کی فیصد _____ ہے؟
- 10%
- 2%
- 3%
- None of these
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Explanation
Nitrogen makes up about 3% of the human body by mass.
It is mostly found in proteins, DNA, and RNA.
It is essential for building amino acids and nucleic acids in the body.
حیاتیاتی عناصر جو زندگی کے لیے اہم سمجھے جاتے ہیں وہ ______ اراکین یا تعداد میں ہوتے ہیں۔
- 13
- 12
- 14
- 16
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Explanation
The number of bioelements considered vital for life is 16. These essential elements include:
- Carbon (C)
- Hydrogen (H)
- Oxygen (O)
- Nitrogen (N)
- Phosphorus (P)
- Sulfur (S)
- Potassium (K)
- Calcium (Ca)
- Magnesium (Mg)
- Iron (Fe)
- Sodium (Na)
- Chlorine (Cl)
- Copper (Cu)
- Zinc (Zn)
- Manganese (Mn)
- Iodine (I)
پروٹوزوا کا مطالعہ حیاتیات کی کس شاخ سے متعلق ہے؟
- Microbiology
- Molecular biology
- Parasitology
- None of these
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Explanation
Protozoa are often studied under parasitology because many are parasites causing diseases like malaria and amoebiasis.
Though protozoa are microorganisms, their parasitic nature makes them a key focus in parasitology.
