Browse by Stream
Discuss Doubts
Home
Search for Exam, Articles, Questions
get app
Go To Your Study Dashboard
  1. Home
  2. Solve this problem - Laws of motion - JEE Main-2
# Engineering

 

Light is incident normally on a completely absorbing surface with an energy flux of  25 Wcm ^{-2} . If the surface has an area of 25cm ^{-2} ,The momentum transferred to the surface in 40 min time duration will be : 

 

  • Option 1)

    6.3 \times 10 ^ { -4} Ns

  • Option 2)

    1.4 \times 10 ^ { -6} Ns

  • Option 3)

    5.0 \times 10 ^ { -3} Ns

  • Option 4)

    3.5 \times 10 ^ { -6} Ns

Answers (1)
A Aadil.Khan

Pressure = I/C 

Force = Pressure * Area = I/C * A 

momentum transferred =

 F \cdot \Delta T \\\\ = \frac{I}{C} \cdot A \cdot \Delta T \\\\ = \frac{25 \times 10 ^ 4 }{3 \times 10 ^8 }\times 25 \times 10 ^{-4} \times 40 \times 60 \\\\ = 5 \times 10 ^{-3}Ns


Option 1)

6.3 \times 10 ^ { -4} Ns

Option 2)

1.4 \times 10 ^ { -6} Ns

Option 3)

5.0 \times 10 ^ { -3} Ns

Option 4)

3.5 \times 10 ^ { -6} Ns

Similar Questions

Preparation Products

Knockout JEE Main April 2021

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout JEE Main April 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-
Buy Now
Test Series JEE Main April 2021

Take chapter-wise, subject-wise and Complete syllabus mock tests and get in depth analysis of your test..

₹ 6999/- ₹ 4999/-
Buy Now
JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Test Series JEE Main April 2022

Take chapter-wise, subject-wise and Complete syllabus mock tests and get an in-depth analysis of your test..

₹ 6999/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
Start Now
 
Exams
Articles
Questions