To measure the current through and the voltage across a resistor in a circuit, you should place the ammeter in _____ with the resistor and the voltmeter in _____ with the resistor
a. series, series b. parallel, series
c. parallel, parallel d. series, parallel
d
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When a liquid copper-nickel alloy is rapidly cooled, the center of the grains has a higher concentration of nickel atoms than the average concentration. This is _____________.
Fill in the blank(s) with the appropriate word(s).
Suppose that two objects collide. Which of the following things is not necessarily the same both before and after the collision? (In other words, which quantity is not conserved according to the laws of physics?)
A) the total temperature of the objects B) the total momentum of the objects C) the total angular momentum of the objects D) the total energy of the objects
The amount of light reaching the film in a camera is determined by the
A) shutter speed. B) f-stop. C) focal length of the lens.. D) focusing. E) diameter of the aperture.
Three resistors, each with resistance R1, are in series in a circuit. They are replaced by one equivalent resistor, R. Comparing this resistor to the first resistor of the initial circuit, which of the following is true?
a. The current through R equals the current through R1. b. The voltage across R equals the voltage across R1. c. The power given off by R equals the power given off by R1. d. R is less than R1.