Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 29, Problem 17P
(a)
To determine
To Check: Whether the given statement is true or false.
(b)
To determine
To Check: Whether the given statement is true or false.
(c)
To determine
To Check: Whether the given statement is true or false.
(d)
To determine
To Check: Whether the given statement is true or false.
(e)
To determine
To Check: Whether the given statement is true or false.
(f)
To determine
To Check: Whether the given statement is true or false.
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Students have asked these similar questions
A transformer steps the line voltage down from 110 to 9.0 V so that a current of 0.50 A can be delivered to a doorbell. (a) What is the ratio of the number of turns in the primary and secondary windings? (b) What is the current in the primary winding? (c) What is the resistance seen by the 110-V source?
Ex.3-Cell phone charger. The charger for a cell phone contains a transformer that reduces 120-
V (or 240-V) ac to 5.0-V ac to charge the 3.7-V battery. (It also contains diodes to change the
5.0-V ac to 5.0-V dc.) Suppose the secondary coil contains 30 turns and the charger supplies
700mA. Calculate (a) the number of turns in the primary coil, (b) the current in the primary,
and (c) the power transformed.
From time to time, transformers explode. If your neighborhood has ever lost power all at once, this is likely to be
one of the reasons. To illuminate why this happens, consider the transformer box in your neighborhood: It needs
to take the 7200 V from the power lines and transform it to 120 V, which you will use in your home.
(a) If the secondary coil has 40 turns, how many turns does the primary coil have?
(b) If the 7200 V coil and the 120 V coil are separated by a distance of 30 cm, calculate the electric field that
exists between them.
(c) How much energy is stored in this electric field, if the total volume enclosed between the transformer is 0.6
m³? Do you think this is enough to cause an explosion?
[If you're curious, the real reason is because they contain a mineral oil that is used for insulation. If there is a short
circuit, lightning strike, or if the temperature otherwise gets too high, the oil begins to vaporize, forming bubbles
of hydrogen and methane, which is highly…
Chapter 29 Solutions
Physics for Scientists and Engineers
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Check Your Understanding A transformer steps the line voltage down from 110 to 9.0 V so that a current of 0.50 A can be delivered to a doorbell (a) What is the ratio of the number of turns in the primary and secondary windings? (b) What is the current in the primary winding? (c) What is the resistance seen by the 110-V source?arrow_forwardDo Kirchhoff’s rules apply to circuits that contain inductors and Capacitors?arrow_forwardA step-up transformer is designed so that the output of its secondary winding is 2000 V(rms) when the primary winding is connected to a 110-V (rms) line voltage, (a) If there are 100 turns in the primary winding, how many turns are there in the secondary winding? (b) If a resistor connected across the secondary winding draws an rms current of 0.75 A. what is the current in die primary winding?arrow_forward
- Will a transformer work if the input is a dc voltage?arrow_forwardAn emf of 9.7 × 10-3 V is induced in a coil while the current in a nearby coil is decreasing at a rate of 2.7 A/s. What is the mutual inductance of the two coils?arrow_forwardAn emf of 0.40 V is induced across a coil when the current through it changes uniformly from 0.10 to 0.60 A in 0.30 s. What is the self-inductance of the coil?arrow_forward
- (a) What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 500 turns, its secondary 4 turns, and the input voltage is 120 V? (b) What input current is required to produce a 4.00 A output? (c) What is the power input?arrow_forwardA transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected to a 14-V source. (a) What is the voltage output of the secondary? V (b) If 1 A flows in the primary coil, how much current is there in the secondary coil? Aarrow_forwardHalogen bulbs have some differences from standard incandescent lightbulbs. They are generally smaller, the filament runs at a higher temperature, and they have a quartz (rather than glass) envelope. They may also operate at lower voltage. Consider a 12 V, 50 W halogen bulb for use in a desk lamp. The lamp plugs into a 120 V, 60 Hz outlet, and it has a transformer in its base. Suppose the transformer in the base of the lamp has 500 turns of wire on its primary coil. How many turns are on the secondary coil?A. 50 B. 160C. 500 D. 5000arrow_forward
- A generating station is producing 1.1 x 106 W of power that is to be sent to a small town located 7.5 km away. Each of the two wires that comprise the transmission line has a resistance per length of 3.1 x 10-2/km. (a) Find the power lost in heating the wires if the power is transmitted at 1400 V. (b) A 100:1 step-up transformer is used to raise the voltage before the power is transmitted. How much power is now lost in heating the wires?arrow_forwardA device requires a secondary output voltage of 1400 V at a resistance of 200 Ω. The transformer is supplied by a 250 V outlet. What is the power of the transformer of this device?arrow_forward21arrow_forward
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