A 4-? resistor, an 8-? resistor, and a 24-? resistor are connected together. What is the maximum resistance that can be produced using all three resistors?
A) 288 ?
B) 12 ?
C) 96 ?
D) 36 ?
E) 192 ?
D
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Spheres of Charge: In the figure, a conducting sphere of radius r1 = 0.050 m is placed at the center of a spherical conducting shell of inner radius r2 = 0.100 m and outer radius r3 = 0.140 m. The inner sphere carries an excess charge of -4.0 nC. The outer spherical shell carries a net excess charge of 3.0 nC. Calculate the magnitude of the electric field at the following distances r from the center of the spheres. (k = 1/4??0 = 9.0 × 109 N ? m2/C2) (a) r = 0.075 m (in the air space between spheres),(b) r = 0.120 m (in the metal of the spherical shell), and(c) r = 0.200 m (outside the spherical shell).
What will be an ideal response?
Which of the following physics quantity measures how fast an object is moving?
When we enlarge a photograph of an iron ring, the image of the hole becomes
A) smaller. B) larger. C) neither smaller nor larger.
Which of the following best describes the image of a convex mirror when the object's distance from the mirror is less than the absolute value of the focal point distance?
a. real, inverted, and magnification greater than one b. virtual, upright, and magnification greater than one c. real, inverted, and magnification less than one d. virtual, upright, and magnification less than one