Bundle: Understanding Motor Controls, 4th + Mindtap Electrical, 2 Terms (12 Months) Printed Access Card
4th Edition
ISBN: 9780357097755
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 51, Problem 1RQ
To determine
Operation of diac.
Expert Solution & Answer
Explanation of Solution
Diac has a set voltage depending on the material used. When voltage of that particular value is applied, diac allow current to pass. It operates in both the direction of current flow unlike diode. Once the required voltage is given, it conducts in both direction.
The diac have negative resistance. Due to this, the minimum voltage value needed to keep the diac in on state is less than that of the minimum voltage needed to start the operation of diac. Therefore, the diac starts operation at a particular voltage value and stops when voltage is less than the conduction level.
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Two rods fins) having same dimensions, one made orass (k = 85 Wm
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brass rod 120 Find the distance at which the ame temperature would be
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1. Two long rods of the same diameter-one made of brass (k=85w/m.k) and
the other made of copper (k=375 w/m.k) have one of their ends inserted
into a furnace (as shown in the following figure). Both rods are exposed to
the same environment. At a distance of 105 mm from the furnace, the
temperature of the brass rod is 120°C. At what distance from the furnace
will the same temperature be reached in the copper rod?
Furnace
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Brass rod
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Chapter 51 Solutions
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