College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
Related questions
Question
![_1. If wire has 1.25 x 1016 electrons flowing through its
cross-section in one second, what is the current in the
wire.
2. How much current is flowing when 15 C pass a
specified point in 5 s?
3. An electric motor winding uses 180 m of copper
conductor with a cross-sectional area of 0.26 cm2. Find
the resistance of the electric winding at 20°C. The
resistivity of copper is 1.72 x 10-8 Q-m.
4. What is the resistance of a lamp which allows 0.8 A
current when 110.0 V is applied to it?
5. The heating element in a clothes dryer is rated at 5
Kw and 220 V. How much current does it draw?
6. A potential difference of 9 V is maintained across a
conductor in a circuit. If the conductor has a resistance
of 10 ohms, how many electrons flow through the
conductor's cross-section in 5 seconds?
7. A piece of material with a square cross-section
measuring 1 mm on each side has a length of 1 m.
What is the resistance of this material if it were made of
aluminium? Fused quartz? Finally, calculate the current
through each piece of material if a potential difference
of 1 volt is applied over its length.
8. An electrical device with a potential difference of 15
V across its ends provides energy at a rate of 723 W.
(a) What is its resistance? (b) What is the current in the
resistor?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb4e7b78-5fb6-4ef2-8fd9-06b992e63a43%2F908a3b6d-0173-45d5-ba9b-268bd909464e%2F15xoiw_processed.jpeg&w=3840&q=75)
Transcribed Image Text:_1. If wire has 1.25 x 1016 electrons flowing through its
cross-section in one second, what is the current in the
wire.
2. How much current is flowing when 15 C pass a
specified point in 5 s?
3. An electric motor winding uses 180 m of copper
conductor with a cross-sectional area of 0.26 cm2. Find
the resistance of the electric winding at 20°C. The
resistivity of copper is 1.72 x 10-8 Q-m.
4. What is the resistance of a lamp which allows 0.8 A
current when 110.0 V is applied to it?
5. The heating element in a clothes dryer is rated at 5
Kw and 220 V. How much current does it draw?
6. A potential difference of 9 V is maintained across a
conductor in a circuit. If the conductor has a resistance
of 10 ohms, how many electrons flow through the
conductor's cross-section in 5 seconds?
7. A piece of material with a square cross-section
measuring 1 mm on each side has a length of 1 m.
What is the resistance of this material if it were made of
aluminium? Fused quartz? Finally, calculate the current
through each piece of material if a potential difference
of 1 volt is applied over its length.
8. An electrical device with a potential difference of 15
V across its ends provides energy at a rate of 723 W.
(a) What is its resistance? (b) What is the current in the
resistor?
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