GENERAL SCIENCE CLASS 7 MCQS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
وہ سرکٹ جو کرنٹ کے لیے صرف ایک راستہ فراہم کرتا ہے ____ کہلاتا ہے؟
Series Circuit
Parallel Circuit
Short Circuit
Open Circuit
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Explanation
A series circuit is a circuit that provides only one path for the current to flow. If one component is removed or fails , the entire circuit is interrupted.
آزاد الیکٹران کی حرکت کو ____ کہتے ہیں؟
Electric Field
Electric Potential
Electric Current
Electric Charge
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Explanation
The movement of free electrons is defined as electric current , which is the flow of electrons through a conductor, such as a wire. Electric charge refers to the property of matter, electric field is the force that surrounds charged particles , and electric potential is the potential energy per unit charge.
نارمل ڈولفن کان کی قابل سماعت رینج ____ ہے؟
20 Hz to 120 kHz
20 Hz to 20 kHz
20 Hz to 100 kHz
20 Hz to 50 KHz
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Explanation
Dolphins have a wide audible range that is adapted to their aquatic environment. They can hear sounds in the range of 20 Hz to 120,000 Hz , which is far beyond the human audible range.
عام بلی کے کان کی قابل سماعت حد ______ ہے؟
10 Hz to 31kHz
67 Hz to 45kHz
20 Hz to 20kHz
45 Hz to 64kHz
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Explanation
Cats have a unique audible range that is adapted to their hunting and communication needs. They can hear sounds in the range of 45 Hz to 64,000 Hz , which is wider than humans and dogs.
عام کتے کے کان کی قابل سماعت حد ______ ہے؟
16 Hz to 20kHz
10 Hz to 31kHz
67 Hz to 45kHz
20 Hz to 20kHz
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Explanation
Dogs can hear sounds in the range of 67 Hz to 45,000 Hz , which is slightly higher than the human audible range.
عام وہیل کے کان کی قابل سماعت حد _____ ہے؟
16 Hz to 20kHz
10 Hz to 31kHz
67 Hz to 45kHz
20 Hz to 20kHz
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Explanation
Whales have a unique audible range that is adapted to their underwater environment. They can hear sounds at very low frequencies , often below 20 Hz, and up to 31 kHz.
عام ہاتھی کے کان کی قابل سماعت حد ______ ہے؟
16 Hz to 20kHz
10 Hz to 31kHz
67 Hz to 45kHz
20 Hz to 20kHz
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Explanation
Elephants can hear sounds in the range of 16 Hz to 20,000 Hz.
ہیرے میں آواز کی رفتار _____ ہے؟
6000 m/s
12000 m/s
9000 m/s
15000 m/s
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Explanation
The speed of sound in diamond is approximately 12,000 meters per second (m/s). It is one of the fastest speeds of sound among all materials. The speeds of sound in different materials:
Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s
ہوا میں آواز کی رفتار ______ ہے؟
143 m/s
243 m/s
343 m/s
443 m/s
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Explanation
The velocity of sound in air at sea level under standard conditions (around 15°C or 59°F) is approximately 343 meters per second (m/s)
The speeds of sound in different materials:
Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s
آواز درج ذیل میں سے کس میں سب سے سست سفر کرتی ہے؟
Air
Water
Steel
Diamond
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Explanation
Sound travels slowest in air , with a speed of approximately 343 meters per second (m/s) at 20°C. This is because air is a gas and has a low density and stiffness , which allows sound waves to propagate more slowly through the material. The speeds of sound in different materials:
Air: 343 m/s Water: 1433 m/s Wood: 3300-3600 m/s Brick: 4176 m/s Steel: 6100 m/s Diamond: 12000 m/s
