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RIO SALADO Physics 112 Midterm Exam Newest 2025/2026 With Complete 100 Questions And Correct Answers |Already Graded A+||Brand New Version!|
An electroscope is a device that has small gold foil strips suspended from a metal rod. A student brings a negatively charged rod near the top of a neutral electroscope. The student then briefly touches a hand to the top of the electroscope before removing the charged rod. The foil strips of the electroscope now spread apart. The student then brings a different rod near the top of the electroscope. The leaves of the electroscope move closer together (see below). The new rod must have a net charge that is - ANSWER-negative
which of the following statements concerning charge is most accurate - ANSWER-The total charge present in the system and surroundings is constant in any process
Twp neutral blocks are in physical contact side-by side. Block A is on the left, and block B is on the right. A positively charged rod is near the left side of block A. With the positive rod still present, the blocks seperate. As a result block B will have a net charge that is - ANSWER- positive
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the property of matter that is responsible for static electric effects is - ANSWER-charge
which of the following particles carries the positive type charge? - ANSWER-protons
Two charged spheres are suspended from strings. The charged spheres repel each other. Which statement correctly explains this behavior - ANSWER-both spheres have a negative net charge both spheres have a positive net charge both a and b are correct
A particle with a mass of 0.01 kg and a net charge of -0.05 C accelerates from rest through a uniform electric field. If the strength of the field is 2000 V/C, what is the speed of the particle after traveling for 0.5 m? - ANSWER-Fd=1/2mv^2 qEd=1/2mv^2 sqrt(2qEd/m)=v
sqrt(2 (0.05) (2000) (.5)/0.01
100m/s
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Two charged parallel plates have a uniform field strength of 1200N/C between them. If the separation distance between the plates is 0.15m what is the potential difference between the plates> - ANSWER-V=ER
V=1200 (0.15)
=180 V
an electron moves from a position next to a negatively charged source to a position next to a positively charged source. Which statement is accurate? - ANSWER-The electron will lose energy and move to a higher potential
A particle with a charge of +2uC is at the position marked by x. Which statement concerning the particle's energy is most accurate? - ANSWER- The particle will have a positive energy term
How much energy does it take to move a particle with a charge of +2nC, from an initial position infinitely far from a second particle with a charge of +3mC to a final position 0.2 from the second particle - ANSWER- (9x10^9) (2x10^-9)(3x10^-3)/.2
0.27 J
Consider a uniform electric field of 50N/C directed towards the east. If the potential measured at some point in the field is 80V, what is the potential at a position 1.0 directly east of that point - ANSWER-V=Er 80=50 R
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