Question

108. A large, hollow metallic sphere surrounds a small er metallic sphere of radius r with a charge of Q What is the radial field intensity, a distance R from the surface of the smaller sphere and between the spheres, propor- tional to? (A) . (B) (C) (R+r)2 (R 109. Most nearly, what are the maxi amplitnde and frecuency of the following sinusoidal voltage? 1.(1)-100 eos(20π1+ 45°) (A) 50 V: 45 Hz (B) 100 V; 10 Hz (C) 100 V: 2t Hz (D) 200 V; 20 1Hz 110. What most ucarly is the work nerfmed inm

Answer 1

1. The radial intensity is inversely proportional to the square of the radius of the smaller sphere. The gaussian surface experiences field due to charge concentrated at the center of smaller sphere.

Hence, option B is correct.

2. Maximum voltage = 100V when sin value is maximum

Frequency = 10Hz

Hence, option B is correct.

Answer 2

The field intensity is proportional to the square of the distance from the smaller sphere’s center, thus C is the correct answer.