Questions from College Physics

Q: A suspended object A is attracted to a neutral wall. It’s

A suspended object A is attracted to a neutral wall. It’s also attracted to a positively - charged object B. Which of the following is true about object A? (a) It is uncharged. (b) It has a negative c...

Q: For a closed surface through which the net flux is zero,

For a closed surface through which the net flux is zero, each of the following four statements could be true. Which of the statements must be true? (There may be more than one.) (a) There are no charg...

Q: A test charge of +3μC is at a point P where

A test charge of +3μC is at a point P where the electric field due to other charges is directed to the right and has a magnitude of 4 x 106 N/C. If the test charge is replaced with a charge of -3μC, t...

Q: A circular ring of charge of radius b has a total charge

A circular ring of charge of radius b has a total charge q uniformly distributed around it. Find the magnitude of the electric field in the center of the ring. (a) 0 (b) keq/b2 (c) keq2/b2 (d) keq2/b...

Q: A “free” electron and a “free” proton are

A “free” electron and a “free” proton are placed in an identical electric field. Which of the following statements are true? (a) Each particle is acted upon by the same electric force and has the same...

Q: Rank the magnitudes of the electric field at points A, B

Rank the magnitudes of the electric field at points A, B, and C in Figure 15.15, with the largest magnitude first. (a) A, B, C (b) A, C, B (c) C, A, B (d) The answer can’t be determi...

Q: Calculate the magnitude of the flux of a constant electric field of

Calculate the magnitude of the flux of a constant electric field of 5.00 N/C in the z - direction through a rectangle with area 4.00 m2 in the x y - plane. (a) 0 (b) 10.0 N · m2/C (c) 20.0 N · m2/C (d...

Q: A 40.-g block of ice is cooled to -78

A 40.-g block of ice is cooled to -78°C and is then added to 560 g of water in an 80.-g copper calorimeter at a temperature of 25°C. Determine the final temperature of the system consisting of the ice...

Q: Suppose the electric field of Quick Quiz 15.7 is tilted

Suppose the electric field of Quick Quiz 15.7 is tilted 60° away from the positive z - direction. Calculate the magnitude of the flux through the same area. (a) 0 (b) 10.0 N · m2/C (c) 20.0 N · m2/C (...

Q: Find the electric flux through the surface in Figure 15.28

Find the electric flux through the surface in Figure 15.28. Assume all charges in the shaded area are inside the surface. (a) -(3 C)/Ñ”0 (b) (3 C)/Ñ”0 (c) 0 (d) -(6 C)/Ñ...