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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- 1
- -1
- 0
- 2
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Explanation
- Cross product formula:
(a, b) × (c, d) = (ad - bc) (since 2D vectors give a scalar representing the magnitude and direction along the z-axis)
- Calculation:
(1)(-1) - (0)(0) = -1 - 0 = -1
اگر ناٹ گیٹ کا ان پٹ "1" ہے تو اس کا آؤٹ پٹ _____ ہے؟
- 1
- 0
- May be 1 or may be 0
- None of these
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Explanation
A NOT gate, also known as an inverter.
It is a digital logic gate that negates the input signal.
If the input is "1", the output will be "0".
If the input is "0", the output will be "1".
The truth table for a NOT gate is:
Input | Output
-----|------
0 | 1
1 | 0
- Speed
- Wavelength
- Frequency
- Direction
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Explanation
Speed decreases (due to higher refractive index of water).
- Wavelength decreases (since speed = frequency × wavelength).
- Direction may change (refraction).
- Frequency remains constant because it’s determined by the source of the light, not the medium.
- Pressure
- Weight
- Energy
- None of these
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Explanation
Heat is a form of energy, specifically thermal energy, which is transferred from one body to another due to a temperature difference.
It is a type of kinetic energy, where the particles of a substance vibrate or move rapidly, generating heat.
وقت کا دورانیہ کس کا باہمی ہے۔
- Velocity
- Speed
- Frequency
- None of these
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Explanation
The reciprocal of frequency is its time period.
The time taken for the one complete cycle is known as the time period, hence, the period is the reciprocal of the frequency.
- Newton (N)
- Joule (J)
- Pascal (Pa)
- Watt (W)
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Explanation
The SI unit of stress is Pascal (Pa).
1 Pascal = 1 Newton / meter² (N/m²)
Stress = Force / Area
→ Units: N / m² = Pa
تسلسل کے ایس آئی یونٹ کیا ہے؟
- NS
- NS⁻¹
- Kg m sec⁻¹
- None of these
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Explanation
Impulse is defined as the product of force and time (Impulse = Force × Time).The SI unit of impulse is Newton-second (NS), which is equivalent to kg·m/s (momentum unit).
- K.E = mv²
- K.E = 1/2 mv²
- K.E = 2mv
- K.E = 1/2 m/v
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Explanation
- Definition: The kinetic energy of an object is the form of energy that it possesses due to its motion
- The formula of kinetic energy is: K.E = 1/2 mv²(where m = mass of the object , v = velocity of the object)
- Common symbols: KE, Ek, K or T
- SI unit: joule (J)
- The energy transferred is known as kinetic energy
- Depends on the mass and speed achieved.
Last updated on 09-03-2026
- Truth
- Early
- Lie
- Delay
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Explanation
PREVARICATE ٹال مٹول , گول مول بات کرنا Lie, جھوٹ |
- Dull
- Obscure
- Dark
- Opaque
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Explanation
Opaque materials do not allow light to pass through them, unlike dull, obscure, or dark.
It may still permit some degree of light penetration.
