A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV?
A) 50.0 ? in series
B) 50.0 ? in parallel
C) 75.0 ? in parallel
D) 100 ? in series
E) 100 ? in parallel
D
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Three resistors, with values of 1.0, 4.0, and 10.0 ?, respectively, are connected in series. What is the overall resistance of this combination?
a. 0.7 ? b. 5.0 ? c. 4.0 ? d. 15 ?
An imaginary spherical surface has radius 1.5 m. Fully contained within and concentric with the spherical surface is a spherical conductor with a uniform surface charge density of 
What is its radius if the flux through the imaginary surface is electric field 1.5 m from its center is 
A. 3.2 cm B. 4.7 cm C. 9.5 cm D. 6.4 cm E. 3.9 cm
A heat engine has an efficiency of 35.0% and its power output is 600 W. What is the rate of heat input?
A. 1.8 kW. B. 2.0 kW. C. 2.4 kW. D. 3.0 kW.
If atmospheric pressure increases by an amount ?p, which of the following statements about the pressure in a lake is true? (There could be more than one correct choice.)
A) The absolute (total) pressure does not change. B) The gauge pressure increases by ?p. C) The absolute (total) pressure increases by ?p. D) The absolute (total) pressure increases, but by an amount less than ?p. E) The gauge pressure does not change.