Which of the following scientists formulated the 'Uncertainty Principle', stating that exact position and momentum of an electron cannot be simultaneously known? MCQ with Answer and Explanation

Which of the following scientists formulated the 'Uncertainty Principle', stating that exact position and momentum of an electron cannot be simultaneously known?
A. Werner Heisenberg
B. Erwin Schrodinger
C. Niels Bohr
D. Max Planck
Answer: Option A
Solution (By JKSSB Mock Tests)
Werner Heisenberg, a German theoretical physicist, published his famous Uncertainty Principle in 1927. The principle dictates a fundamental limit to precision at the quantum level: the more precisely the position of a particle (like an electron) is determined, the less precisely its momentum can be known, and vice versa. Mathematically, delta_x * delta_p >= h/(4pi).

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1
Two 100 W, 200 V bulbs are connected in series across 200 V supply. Total power consumed is
A. 25 W
B. 50 W
C. 100 W
D. 200 W

Correct Answer: Option B


Explanation:
Each bulb resistance R = V²/P = 40000/100 = 400 Ω. In series, total R = 800 Ω. Total power P_total = V²/(total R) = 200²/800 = 40000/800 = 50 W. So each bulb gets 25 W. Series reduces power.

This question belongs to: Science Physics
Question #2
The instrument used to measure potential difference is
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Galvanometer

Correct Answer: Option A


Explanation:
Voltmeter measures potential difference in volts. Connected in parallel. Ideal voltmeter has infinite resistance. Galvanometer can be converted to voltmeter by adding high resistance in series.

This question belongs to: Science Physics
Question #3
In a simple pendulum, the restoring force is provided by
A. Component of weight tangential to path
B. Tension in string
C. Air resistance
D. Centripetal force

Correct Answer: Option A


Explanation:
For small angular displacement, restoring force = -mg sinθ ≈ -mgθ, directed towards equilibrium. Tangential component of weight. Tension balances radial component. This causes SHM.

This question belongs to: Science Physics