EVERYDAY SCIENCE
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پی ڈی ایف میں ڈنلوڈ کرنے کے لیےاس لنک پر کلک کریں۔
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
مقناطیسی بہاؤ کثافت کی اکائی ______ ہے؟
Wb
Wbm^-2
Wbm^-1
Wbm
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Explanation
The unit of magnetic flux density is Wb m⁻² (weber per square meter).
It is commonly referred to as a tesla (T) , which quantifies the strength of the magnetic field.
محرک کرنٹ اس سمت میں بہے گا تاکہ اس وجہ کی مخالفت کرے جو اسے پیدا کرتی ہے _______ کا بیان ہے؟
Lenz's Law
Joule's Law
Ampere's Law
Faraday's Law
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Explanation
The induced current will flow in such a direction so as to oppose the cause that produces it is the statement of Lenz's Law.
This law reflects the principle of conservation of energy in electromagnetic induction.
1
2
1/2
Zero
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Explanation
In an AC generator , the emf will be maximum when the factor sinωt is equal to 1 .
This occurs when the angle is 90° .
This resulting in the peak value of the sinusoidal emf.
الیکٹرک جنریٹر اور ٹرانسفارمرز ______ کے اصولوں پر مبنی ہیں؟
Coulomb's law
Hook's law
Faraday's law
Ampere's law
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Explanation
Electric generators and transformers are based on the principles of Faraday's law .
This law explains electromagnetic induction , where a changing magnetic field induces an electric current .
کاربن بانڈ کے دونوں طرف ایک ہی ساختی فارمولہ لیکن ایٹموں کی مختلف پوزیشن والے مرکبات کے ذریعہ کس قسم کی آئسومریزم ظاہر ہوتی ہے؟
Geometric
Tautomerism
Chain
Metamerism
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Explanation
Geometric isomerism is displayed by compounds having the same structural formula but different positions of atoms or groups on either side of a double bond.
It involves Geometric isomerism is displayed by compounds having the same structural formula but different positions of atoms or groups on either side of a double bond.
It involves cis-trans or E-Z isomers .
Chain
Functional Group
Metamerism
Position
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Explanation
I-Butene and II-Butene show position isomerism.
The double bond is located at different positions in the carbon chain , which distinguishes them.
مندرجہ ذیل میں سے کون سا منتقلی عناصر کی خاصیت نہیں ہے؟
Ions and compounds are colorless
High melting points
Hard metals
Good conductors of electricity
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Explanation
Ions and compounds are colorless is not a property of transition elements.
Transition elements often form colored compounds due to d-d electron transitions , while they also exhibit high melting points.
They are hard metals , and are good conductors of electricity.
کرومیم کی الیکٹرانک ترتیب (پروٹون نمبر 24) _____ ہے؟
[Ar] 3d⁵ 4s¹
[Ar] 3d^6 4s²
[Ar] 3d4s²
None of these
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Explanation
The electronic configuration of chromium (Proton number 24) is [Ar] 3d⁵ 4s¹.
Chromium exhibits an exception to the standard filling order to achieve a more stable half-filled d-subshell.
مندرجہ ذیل میں سے کون سا مرکب نہیں ہے؟
Bronze
Graphite
Steel
Brass
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Explanation
Graphite is not an alloy; it is a pure form of carbon.
The bronze, steel, and brass are alloys made from a mixture of metals.
عام طور پر الکلین دھاتوں کے سلفیٹ کی حل پذیری ______؟
Increase then decrease down the group
Doesn't change down the group Increase down the group
Decrease down the group
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Explanation
The solubility of sulfates of alkaline metals generally decreases down the group.
As you move down the group , the lattice energy of the sulfates increases .
This making them less soluble in water.