FDE EST Physics Past Paper 21-04-2024

Q31: A proton is moving in an electric field described by the potential V= x+6. What is the force experienced by the proton?

F = dV/dx

F = q. dv/dx

F = −q. dv/dx

F = −q. dv/dx + qE

Q32: If the initial velocity is 40 m/s, time is 5 seconds, and acceleration is 10 m/s2, then the distance traveled is?

200 m

275 m

325 m

400 m

Q33: If a star is moving away from an observer, the observed shift in the wavelength of its light is called?

اگر کوئی ستارہ کسی مبصر سے دور ہو رہا ہو تو اس کی روشنی کی طول موج میں مشاہدہ شدہ تبدیلی کہلاتی ہے؟

Blueshift

Redshift

Greenshift

Yellowshift

Q34: The speed of sound in vacuum is?

خلا میں آواز کی رفتار کتنی ہے؟

0 m/s

343 m/s

1,480 m/s

3.00 x 10^8 m/s

Q35: How can the peak value of current in an AC circuit be found?

ای۔سی سرکٹ میں کرنٹ کی چوٹی کی قیمت کیسے معلوم کی جا سکتی ہے؟

By dividing the peak voltage by the resistance of the circuit

By multiplying the peak voltage by the resistance of the circuit

By dividing the peak voltage by the impedance of the circuit

By multiplying the peak voltage by the impedance of the circuit

Q36: How is the angle made by a vector with the x-axis typically denoted?

α

β

θ

ϕ

Q37: What is the velocity required to put a satellite into orbit around the Earth?

سیٹلائٹ کو زمین کے گرد مدار میں ڈالنے کے لیے کتنی رفتار کی ضرورت ہے؟

5.8 km/s

7.8 km/s

9.8 km/s

11.8 km/s

Q38: The product of resistance (R) and capacitance (C), denoted as RC, has dimensions of?

Voltage

Current

Charge

Time

Q39: The Compton shift is equal to the Compton wavelength at which angle?

کامپٹن شفٹ کس زاویہ پر کامپٹن طول موج کے برابر ہے؟

0 degrees

45 degrees

90 degrees

180 degrees

Q40: If the capacitance C and resistance R of an RC circuit are given, what is the time constant (τ) of the circuit?

τ=R+C

τ=R−C

τ=RC

τ= R/C