SPSC Physics 25 years Past Papers

Q111: The momentum of an object at a given instant is independent of its ______?

کسی دیئے گئے فوری طور پر کسی شے کی رفتار اس کے ______ سے آزاد ہے؟

Acceleration

Velocity

Mass

None of these

Explanation

Momentum ( $p = mv$ ) depends on an object's mass and velocity, but not directly on its acceleration.

Acceleration affects how momentum changes over time, but at a given instant, momentum is independent of acceleration.

Q112: A constant current is tent through a helical coil. The coil ______?

ایک مستقل کرنٹ ایک ہیلیکل کنڈلی کے ذریعے خیمہ ہے۔ کنڈلی ______؟

Produces zero magnetic field at its center

Tends to get shorter

Tends to get longer

None of these

Q113: A man who weighs 60 kg on earth, weighs 61 kg on a rocket as measured by an observer on the earth. What is the speed of the rocket?

4.5 × 10^7 m/s

5.5 × 10^7 m/s

8.5 × 10^10 m/s

None of these

Q114: A torque of 2 x 10^-4 Nm is applied to produce an angular acceleration of 4rad/s^2 in a rotating body. What is the moment of inertia of the body?

0.5 × 10^-4 kgm^2

0.5 kgm^2

0.5 × 10^4 kgm^2

None of these

Q115: A PN junction can be used as _____?

ایک پی این جنکشن _____ کے طور پر استعمال کیا جاسکتا ہے؟

Rectifier

Amplifier

Oscillator

None of these

Q116: Period of a pendulum is determined by its _____?

لاکٹ کی مدت اس کے _____ کے ذریعہ طے کی جاتی ہے؟

Amplitude

Mass

Length

None of these

Q117: When flowing water enters the constriction of horizontal pipe the water's ______?

جب بہتا ہوا پانی افقی پائپ پانی کے ______ کی مجبوری میں داخل ہوتا ہے؟

Speed decreases and pressure increases

Speed decreases and pressure decreases

Speed increases and pressure decreases

None of these

Q118: Bragg's equation is a consequence of _____?

بریگ کی مساوات _____ کا نتیجہ ہے؟

Diamond structure

Schrodinger equation

Laue equations

None of these

Q119: Capacity of a spherical conductor is numerically equal to ______?

ایک کروی کنڈکٹر کی صلاحیت عددی طور پر ______ کے برابر ہے؟

Volume

Radius

Diameter

None of these

Q120: Which of the following has the longest wavelength?

مندرجہ ذیل میں سے کون سی لمبی طول موج ہے؟

X-rays

Visible light

Radio waves

None of these