NAVY CIVILIAN ALL JOBS PAST PAPERS YEAR 2025
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
حرکت کی وجہ سے توانائی کو _______ کہا جاتا ہے؟
Kinetic energy
Potential energy
Chemical energy
None of these
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Explanation
Kinetic energy is the energy an object possesses due to its motion .
The faster the object moves, the more kinetic energy it has.
اسپرنگ کے مستقل کی اکائی کیا ہے؟
Nm
Nm^-2
Nm^-1
Nm^2
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Explanation
The spring constant (k) represents the force required to stretch or compress a spring by a certain distance.
The unit of spring constant is Newton per meter (N/m) or Newton per meter^-1 (Nm^-1).
rad/s
rad/s²
m/s
N·m
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Explanation
The standard unit for angular velocity is radians per second (rad/s).
Dimensional formula Angular velocity is [T]⁻¹
The SI unit of velocity is a ms^-1 and m/s.
ریفریکشن کا اشاریہ کس پر منحصر ہے
the objective distance
the speed of light
the focus object
the image distance
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Explanation
The refractive index of a medium is dependent (to some extent) upon th e frequency of light passing through, with the highest frequencie s having the highest values of n.
For example
In ordinary glass, the refractive index for violet light is about one percent greater than that for red light.
**
The Refractive Index of a medium depends upon the refractive index of the surroundings, optical density, wavelength of the light, and temperature.
لمبی بینائی کی اصلاح کے لیے کون سا لینس استعمال کیا جاتا ہے؟
Convex lens
Concave lens
Compact lens
Conpave lens
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Explanation
A convex lens has either one or both of its surfaces curving outwards , that is, wider divergence from the plan at the center.
These lenses are used to correct long-sightedness (hypermetropia).
چارج کا ایس آئی یونٹ ________ ہے؟
Ohm
Coulomb
Ampere
None of these
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Explanation
The coulomb , also written as its abbreviation 'C', is the SI unit for electric charge.
One coulomb is equal to the amount of charge from a current of one ampere flowing for one second.
One coulomb is equal to the charge on 6.241 x 1018 protons.
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2
5
7
None of these
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Explanation
Let's denote the smaller number as x and the larger number as y. Given that one number exceeds the other by 5:
y = x + 5
The sum of the numbers is 19:
x + y = 19
Substituting y = x + 5 into the equation:
x + (x + 5) = 19
2x + 5 = 19
2x = 14
x = 7
کے علاوہ محدب آئینے کی مثالیں درج ذیل ہیں؟ ____
Rear-view mirror
Dentist mirror
Blind Corner mirror
Security mirror
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Explanation
Dentist mirrors are typically concave mirrors. The examples of convex mirrors:
Rear-view mirrors Blind Corner mirrors Security mirrors
V = I × R
V = R ÷ I
V = I ÷ R
V = I + R
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Explanation
Ohm’s Law states that the voltage (V) across a conductor is equal to the current (I) flowing through it multiplied by its resistance (R).
where V = voltage,
I = current,
and R = resistance.
Neutron
Increase
Decrease
Constant
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Explanation
In a vacuum, the speed of light is exactly 299,792,458 meters per second (m/s).
This value is a universal constant, often rounded for practical purposes to 3 x 10⁸ m/s.
