When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed across the same two resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the two resistances?
a. 7.2 ?
b. 7.6 ?
c. 6.9 ?
d. 8.0 ?
e. 2.8 ?
a
You might also like to view...
Nanoscience has shown that
A) a chemical occurs with the use of a scanning probe microscope. B) the properties of a material can be different on the level of atoms then its properties when the material is analyzed in bulk. C) a physical change can occur when using a scanning probe microscope. D) DNA is the smallest molecule.
A simple magnifier of refractive power 15.0 D is used to observe a beetle on a student’s desk. If the image of the beetle is twice as large as the beetle itself, where is the image formed relative to the lens?
A. 4.5 cm B. 8.3 cm C. 5.0 cm D. 3.6 cm E. 5.6 cm
Any object moving towards or away from the Earth will show a Doppler shift when observed from Earth
Indicate whether the statement is true or false
Magnetic Field of a Long Wire: A long, straight wire carrying a current is placed along the y-axis. If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire as you view it in such a way that the current is coming directly toward you?
A. clockwise, around the x-axis B. counterclockwise, around the x-axis C. counterclockwise, around the z-axis D. counterclockwise, around the y-axis E. clockwise, around the y-axis