When a 100-? resistor is connected to a battery of emf E and internal resistance r, the battery delivers a power P = 0.794 W. When a 200 ? resistance is connected to same battery it delivers a power P = 0.401 W
What are the emf and internal resistance of the battery? A)
E = 10 V, r = 5 ?
B)
E = 4.5 V, r = 4 ?
C)
E = 18 V, r = 4 ?
D)
E = 9 V, r = 2 ?
E)
E = 12 V, r = 6 ?
D
You might also like to view...
The coma around the nucleus of a comet can be 10 times the size of Earth.
Answer the following statement true (T) or false (F)
The horizontal rows of elements in the periodic table are called
a. periods. b. groups. c. families. d. series.
A muon is an unstable particle that has an average lifetime of 1.52 × 10-6 s
This is the time interval between its creation in a nuclear process and its extinction into decay products, as measured in a frame of reference at rest with respect to the muon. An "average" muon is observed by a scientist on Earth to travel 342 m in its lifetime. What is the speed of the muon relative to Earth? A) 0.821c B) 0.681c C) 0.601c D) 0.551c E) 0.335c
Which of the following are not a common depositional feature of shoreline topography?
a. Barrier islands b. Pocket beaches c. Sea arches d. Spits