Four identical point charges (+6.0 nC) are placed at the corners of a rectangle which measures 6.0 m × 8.0 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?
a. 58 V
b. 63 V
c. 43 V
d. 84 V
e. 11 V
c
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Each second, the burning Sun's mass
A) decreases. B) increases. C) remains unchanged.
When charge Q1 is placed at point P1, the resulting potential at point P is V1 . When Q2 is placed at point P2 after Q1 is in position at P1, the resulting potential at P becomes V2 . What is the potential at point P if charge Q1 is then removed?
a. V1 – V2 c. V1 + V2 b. (V1 + V2)/2 d. V2 – V1
Answer the following statement(s) true (T) or false (F)
Consider an infinite solenoid with a rectangular cross section instead of a circular cross section. 1. The solenoid’s magnetic field must everywhere still point parallel to the solenoid’s central axis. 2. The solenoid’s magnetic field must still be zero everywhere outside the solenoid. 3. The solenoid’s magnetic field in the solenoid’s hollow interior must still have a uniform magnitude ? 0 (NI/L), where N is the number of turns in length L and I is the current carried by each turn
A body travels at an initial speed of 2.5 m/s. Given a constant acceleration of 0.2 m/s2, what is the speed of the body at time 25 seconds later?
A. 7.5 m/s. B. 3.4 m/s. C. 3.6 m/s. D. 5.5 m/s. E. 6.0 m/s.