BASICS OF EVERY DAY SCIENCE EDS
Basics of Every Day Science EDS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
الیکٹرک سرکٹ میں بیٹری کو جوڑنے کا مقصد مندرجہ ذیل میں سے کون سا ہے؟
To maintain resistance across the conductor
To vary resistance across the conductors
To maintain constant potential difference across the conductor
To maintain varying potential difference across the conductor
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Explanation
A battery is connected in an electric circuit to provide a constant potential difference (voltage) across the circuit, allowing electric current to flow through the conductors.
The battery maintains a constant voltage , ensuring a consistent flow of current through the circuit.
کسی جسم کے ذریعے برقی چارج کے بہاؤ کی مخالفت کرنے کی خاصیت کو الیکٹرک _______ کہتے ہیں؟
Capacitance
Resistance
Potential
Conductance
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Explanation
Resistance is the property of a material or object that opposes the flow of electric charge (current) through it.
It is measured in ohms (Ω) and depends on the material, length, and cross-sectional area of the object.
7 Ω
6 Ω
4 Ω
5 Ω
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Explanation
When two resistances are connected in parallel , the net resistance (Rnet) is calculated using the formula:
1/Rnet = 1/R1 + 1/R2
where R1 and R2 are the individual resistances.
In this case, R1 = 6 Ω and R2 = 12 Ω, so:
1/Rnet = 1/6 + 1/12 = 1/4
Rnet = 4 Ω
Therefore, the net resistance of the two resistances connected in parallel is 4 Ω.
اوہم کا قانون ______ پر لاگو نہیں ہوتا؟
D.C. circuits
Small resistors
High currents
Semiconductors
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Explanation
Ohm's law is not applicable to Semiconductors , as the relationship between voltage and current does not remain constant in these devices.
Semiconductors have a non-linear current-voltage characteristic, making Ohm's law inapplicable.
اوہم کے قانون کے درست ہونے کی شرط یہ ہے کہ ______؟
Temperature should remain constant
Current should be proportional to voltage
Resistance must be wire wound type
All of the above
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Explanation
Ohm's Law is valid only if the temperature of the conductor remains constant.
If the temperature changes , the resistance of the conductor may change , and Ohm's Law may not hold.
وہ حالت جب کسی سرکٹ کی مزاحمت صفر ہو تو کیا کہا جاتا ہے؟
Closed-circuit
Short circuit
Open circuit
Zero circuit
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Explanation
A short circuit is a condition where the resistance of a circuit is zero, or very close to zero.
This occurs when there is a direct connection between two points in a circuit, bypassing any resistance or load.
As a result, the current flows freely, and the voltage across the circuit is zero.
اوہم کا قانون کہتا ہے کہ _______؟
Resistance increases as current increases
Resistance decreases as current increases
Resistance increases as voltage increases
Current increases as voltage increases
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Explanation
Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, and inversely proportional to the resistance (R) of the conductor.
Mathematically, this is expressed as: I = V/R Or, V = I × R
This means that as the voltage increases, the current increases, provided the resistance remains constant.
کنڈکٹر کی مزاحمت ______ پر منحصر نہیں ہے؟
Length of the conductor
Area of crossection
Density
Resistivity
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Explanation
The resistance of a conductor does not depend on its density.
Resistance is a property of a conductor that opposes the flow of electric current
It depends on several factors, including the length of the conductor, the cross-sectional area of the conductor , and the resistivity of the material the conductor is made of.
However, density does not affect the resistance of a conductor.
الیکٹرک سرکٹ میں جب الیکٹران کم سے زیادہ صلاحیت کی طرف جاتے ہیں تو وہ _______ کریں گے؟
Gain Energy
Lose their identity
Lose Energy
Gain Potential
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Explanation
When electrons move from low to high potential , they lose energy as they move against the electric field.
This results in a decrease in their kinetic energy , making them slower.
In contrast, when they move from high to low potential , they gain energy and speed up.
اگر متوازی پلیٹ کیپیسیٹر کا رقبہ دوگنا ہو جائے تو اہلیت _____ ہوگی؟
Remain uncharged
Half
Double
Increased two times
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Explanation
If the area of the parallel plate capacitor is doubled , the capacitance will also double. The capacitance of a parallel plate capacitor is directly proportional to the area of the plates: C = ε × (A/d)
