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. Niels Bohr
B. Erwin Schrodinger
C. Max Planck
D. Werner Heisenberg
Answer: Option D
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
Which of the following is a non-contact force?
A. Friction
B. Electrostatic force
C. Normal force
D. Muscular force

Correct Answer: Option B


Explanation:
Electrostatic force acts between charges at a distance without contact. Gravity, magnetic force also non-contact. Friction and normal require contact.

This question belongs to: Science Physics
Question #2
A nucleus of mass number A and atomic number Z contains
A. Z protons and A neutrons
B. A protons and Z neutrons
C. A-Z protons and Z neutrons
D. Z protons and A-Z neutrons

Correct Answer: Option D


Explanation:
Atomic number Z = number of protons. Mass number A = protons + neutrons. So neutrons = A - Z. Electrons = Z in neutral atom. Isotopes same Z, different N.

This question belongs to: Science Physics
Question #3
Refrigerator COP = Q₂/W. If Q₂=300J, W=100J, COP is:
A. 200
B. 400
C. 0.33
D. 3

Correct Answer: Option D


Explanation:
COP = desired output/work input = 300/100 = 3. Typical COP > 1 for refrigerators. Memory aid: 'COP = cooling effect per work; higher = more efficient'. Thermodynamics calculation frequently tested in competitive exams.

This question belongs to: Science Physics