help@askiitians.com

+91-87964 74404

Grade 11Electromagnetic Induction

A particle of mass 1 g and charge 2.5 × 10-4 C is released from rest in an electric field of 1.2 × 104 N/C. (a) Find the electric force and the force of gravity acting on this particle. Can one of these forces be neglected in comparison with the other for approximate analysis? (b) How long will it take for the particle to travel a distance of 40 cm? (c) What will be the speed of the particle after travelling this distance? (d) How much is the work done by the electric force on the particle during this period?

Radhika Batra

12 Years agoGrade 11

1 Answer

Kevin Nash

12 Years ago

Sol. m = 1 g = 10^–3 kg, u = 0, q = 2.5 × 10^–4 C ; E = 1.2 × 10^4 N/c ; S = 40 cm = 4 × 10^–1 m a) F = qE = 2.5 × 10^–4 × 1.2 × 10^4 = 3 N So, a = F/m = 1/10^-3 = 3 * 10^3 E base q = mg = 10^-3 * 9.8 = 9.8 * 10^-3 N b) S = 1/2 at^2 or t = √2a/g = √2 * 4 *10^-1/3 * 10^3 = 1.63 * 10^-2 sec v^2 = u^2 + 2as = 0 + 2 * 3 * 10^3 * 4 * 10^-1 = 24 * 10^2 ⇒ v = √24 * 10^2 = 4.9 * 10 = 49 m/sec work done by the electric force w = F→td = 3 * 4 * 10^-1 = 12 * 10^-1 = 1.2 J

How to get expertise in Class 10 science this year and get preparation for boardexam

electromagnetic induction

1 Answer Available

Last Activity: 4 Years ago

AB is a current carrying conductor in the plane of the paper as shown in the figure below. (i) What is the direction of the magnetic field produced by it at point ‘X’? Write the statement of the rule used to find the direction of field lines. (ii) If the polarity of the battery connected to the wire is reversed, how would the direction of the magnetic field be changed? (iii) Point ‘X’ is at a distance r1 and point ‘Y’ is at a distance r2 (r1

electromagnetic induction

1 Answer Available

Last Activity: 4 Years ago

formula of c in curies temperature please ansewr i am waiting for the answer

electromagnetic induction

1 Answer Available

Last Activity: 4 Years ago

For minimum flux the angle between the magnetic field and normal to the surface is

electromagnetic induction

1 Answer Available

Last Activity: 4 Years ago

What is the de Broglie wavelength ( in am) associated with an electron subjected to a potential difference of 54 volt

electromagnetic induction

1 Answer Available

Last Activity: 4 Years ago

View all Questions