PAF AERONAUTICAL ENGINEERING PAST PAPER 2021 TO DATE
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- Gigaamperes
- Kiloamperes
- Megaamperes
- Microamperes
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Explanation
In a reverse-biased PN junction, the reverse current is typically very small, usually in the range of microamperes (μA).
This current is primarily due to minority charge carriers.
- tana
- -tana
- -cota
- cota
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Explanation
The trigonometric identity is:cot(a - 90°) = -tan(a)
So, if we replace "a" with "a - 90°", we get:
cot(a - 90°) = -tan(a)
- 45
- 47
- 49
- 51
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Explanation
(7 - √2)(7 + √2):
Use the formula (a - b)(a + b) = a² - b²
Here, a = 7 and b = √2
So,
= 7² - (√2)²
= 49 - 2
= 47
- A snake was killed by him.
- A snake was being killed by him.
- A snake has been killed by him.
- A snake will be killed by him.
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Explanation
ChatGPT said:
The given sentence is:
"He has killed a snake."
This is in Present Perfect Tense (Active Voice).
The passive voice of a present perfect sentence is formed as:
Object + has/have + been + past participle + by + subject
So, the correct passive voice is:
"A snake has been killed by him."
