Exam (elaborations)
Test Bank for Physics Principles with Applications ((10))
- Module
- Institution
Test Bank for Physics Principles with Applications ((10))
[Show more]
Seller
Follow
divedmark
Reviews received
Content preview
Physics: Principles with Applications, Sixth Edition25) If the current flowing through a circuit of constant resistance is doubled, the power dissipated
by that circuit will
A) quadruple.
B) double.
C) decrease to one half.
D) decrease to one fourth.
Answer: A
Diff: 1 Page Ref: Sec. 18.5-18.6
26) During a power demand, the voltage output is reduced by 5.0%. By what percentage is the
power on a resistor affected?
A) 2.5% less
B) 5.0% less
C) 10% less
D) 90% less
Answer: C
Diff: 2 Page Ref: Sec. 18.5-18.6
27) A current that is sinusoidal with respect to time is referred to as
A) a direct current.
B) an alternating current.
Answer: B
Diff: 1 Page Ref: Sec. 18.7
28) Consider two copper wires each carrying a current of 3.0 A. One wire has twice the diameter
of the other. The ratio of the drift velocity in the smaller diameter wire to that in the larger
diameter wire is
A) 4:1.
B) 2:1.
C) 1:2.
D) 1:4.
Answer: A
Diff: 2 Page Ref: Sec. 18.8
29) Materials in which the resistivity becomes essentially zero at very low temperatures are
referred to as
A) conductors.
B) insulators.
C) semiconductors.
D) superconductors.
Answer: D
Diff: 1 Page Ref: Sec. 18.9
347
,Chapter 18: Electric Currents
Quantitative Problems
1) What current is flowing if 0.67 C of charge pass a point in 0.30 s?
A) 2.2 A
B) 0.67 A
C) 0.30 A
D) 0.20 A
Answer: A
Diff: 1 Page Ref: Sec. 18.1
2) A charge of 12 C passes through an electroplating apparatus in 2.0 min. What is the average
current?
A) 0.10 A
B) 0.60 A
C) 1.0 A
D) 6.0 A
Answer: A
Diff: 1 Page Ref: Sec. 18.2
3) How much charge must pass by a point in 10 s for the current to be 0.50 A?
A) 20 C
B) 2.0 C
C) 5.0 C
D) 0.050 C
Answer: C
Diff: 1 Page Ref: Sec. 18.2
4) A total of 2.0 ˛ 1013 protons pass a given point in 15 s. What is the current?
A) 1.3 mA
B) 1.3 A
C) 0.21 mA
D) 3.2 mA
Answer: C
Diff: 2 Page Ref: Sec. 18.2
5) What current is flowing if 4.0 ˛ 1016 electrons pass a point in 0.50 s?
A) 0.013 A
B) 0.31 A
C) 6.3 A
D) 78 A
Answer: A
Diff: 2 Page Ref: Sec. 18.2
348
, Physics: Principles with Applications, Sixth Edition
6) If 3.0 ˛ 1015 electrons flow through a section of a wire of diameter 2.0 mm in 4.0 s, what is the
current in the wire?
A) 0.12 mA
B) 0.24 mA
C) 7.5 ˛ 107 A
D) 7.5 ˛ 1014 A
Answer: A
Diff: 2 Page Ref: Sec. 18.2
7) A coffee maker, which draws 13.5 A of current, has been left on for 10 min. What is the net
number of electrons that have passed through the coffee maker?
A) 1.5 ˛ 1022
B) 5.1 ˛ 1022
C) 1.8 ˛ 103
D) 8.1 ˛ 103
Answer: B
Diff: 2 Page Ref: Sec. 18.2
8) In an electroplating process, it is desired to deposit 40 mg of silver on a metal part by using a
current of 2.0 A. How long must the current be allowed to run to deposit this much silver?
(The silver ions are singly charged, and the atomic weight of silver is 108.)
A) 16 s
B) 18 s
C) 20 s
D) 22 s
Answer: B
Diff: 2 Page Ref: Sec. 18.2
9) What potential difference is required to cause 4.00 A to flow through a resistance of 330 W?
A) 12.1 V
B) 82.5 V
C) 334 V
D) 1320 V
Answer: D
Diff: 1 Page Ref: Sec. 18.3
349
, Chapter 18: Electric Currents
10) What is the voltage across a 5.0-W resistor if the current through it is 5.0 A?
A) 100 V
B) 25 V
C) 4.0 V
D) 1.0 V
Answer: B
Diff: 1 Page Ref: Sec. 18.3
11) A 4000-W resistor is connected across 220 V. What current will flow?
A) 0.055 A
B) 1.8 A
C) 5.5 A
D) 18 A
Answer: A
Diff: 1 Page Ref: Sec. 18.3
12) A light bulb operating at 110 V draws 1.40 A of current. What is its resistance?
A) 12.7 W
B) 78.6 W
C) 109 W
D) 154 W
Answer: B
Diff: 1 Page Ref: Sec. 18.3
13) A 12-V battery is connected to a 100-W resistor. How many electrons flow through the wire in
1.0 min?
A) 1.5 ˛ 1019
B) 2.5 ˛ 1019
C) 3.5 ˛ 1019
D) 4.5 ˛ 1019
Answer: D
Diff: 2 Page Ref: Sec. 18.3
14) What is the resistance of 1.0 m of no. 18 copper wire (diameter 0.40 in)? (The resistivity of
copper is 1.68 ˛ 10-8 Wœm.)
A) 0.00012 W
B) 0.00021 W
C) 0.0012 W
D) 0.0021 W
Answer: B
Diff: 2 Page Ref: Sec. 18.4
350
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller divedmark. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.44. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now