Polytechnic & Diploma Engineering Entrances (JEECUP, POLYCET & DTED)

Mechanics, Electricity & Magnetism question bank (Polytechnic Physics)

Practice 45 free Polytechnic & Diploma Engineering Entrances (JEECUP, POLYCET & DTED) Polytechnic Physics - Mechanics, Electricity & Magnetism questions with answers and step-by-step solutions.

Start free Book a demo

All Hard Medium

Q1.

Refer to the Case Study 'Case Study: Optical Fibers and Total Internal Reflection in Medical Endoscopy' to answer:

What essential conditions must be satisfied for total internal reflection to occur within the optical fiber?

(A)

Light must propagate from an optically denser medium to a rarer medium, and the angle of incidence must exceed the critical angle

(B)

Light must propagate from a rarer medium to a denser medium at an angle less than the critical angle

(C)

Both core and cladding must possess identical refractive indices

(D)

Light must be polarized parallel to the fiber axis

Show answer & solution

Verified Answer & Solution Locked

Q2.

Refer to the Case Study 'Case Study: Optical Fibers and Total Internal Reflection in Medical Endoscopy' to answer:

Calculate the critical angle $\theta_c$ for the optical fiber described in the passage ($n_1 = 1.52, n_2 = 1.48$).

(A)

$\theta_c = \sin^{-1}\left(\frac{1.48}{1.52}\right) \approx 76.8^\circ$

(B)

$\theta_c = \sin^{-1}\left(\frac{1.52}{1.48}\right)$ (Undefined)

(C)

$\theta_c = \cos^{-1}(1.48 \times 1.52) \approx 45^\circ$

(D)

$\theta_c = \tan^{-1}\left(\frac{1.48}{1.52}\right) \approx 44.2^\circ$

Show answer & solution

Verified Answer & Solution Locked

Protected Questions

Unlock All 16 Questions in Mechanics, Electricity & Magnetism

Log in or sign up free to access every question with complete solutions, create chapter practice tests, and track your performance.

Sign up free to access all 16 questions

Unlock every Mechanics, Electricity & Magnetism question, generate papers, and practice at your own pace.

Start free