A lamp rated at 120 W 120 V has a filament resistance ofA) 60 ohmsB) 100 ohmsC) 144 ohmsD) 1 ohmE) honeI=

Given data: The power is P=120 W The supply voltage is V=120 V The expression for the power in…

Answered: A lamp rated at 120 W 120 V has a…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter23: Series And Parallel Circuits

Section: Chapter Questions

Problem 40A

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Similar questions

What voltage is involved in a 1.44-kW short circuit through a 0.100- resistance?
The ohm is another name for which of the following? (8.2) (a) volt per ampere (b) ampere per volt (c) watt (d) volt
Appliances with heating elements require which of the following? (8.3) (a) a large current (b) a large resistance (c) a low joule heat
Find the resistance that must be placed in series with a 25.0- galvanometer having a 50.0A sensitivity (thesame as die one discussed in the text) to allow it to be used as a voltmeter with a 3000-V full-scale reading. Include a circuit diagram with your solution.
What current flows through the bulb of a 3.00-V flashlight when its hot resistance is 3.60 ?
Three 9.0- resistors are connected in series with a 12-V battery. Find (a) the equivalent resistance of the circuit and (b) the current in each resistor. (c) Repeat for the case in which all three resistors are connected in parallel across the battery.
Find the resistance that must be placed in series with a 25.0- galvanometer having a 50.0-A sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 10.0-A full-scale reading. Include a circuit diagram with your solution.
Three 9.0- resistors are connected in series with a 12-V battery. Find (a) the equivalent resistance of the circuit and (b) the current in each resistor. (c) Repeat for the case in which all three resistors are connected in parallel across the battery.
Show that if two resistors R1 and R2 are combined and one is much greater than the other (R1R2) (a) their series resistance is very n early equal to the greater resistance R1 and (b) their parallel resistance is very nearly equal to smaller resistance R2 .
In a dc circuit, how do electrons move? (8.2) (a) with a slow drift velocity (b) in alternate directions (c) near the speed of light (d) none of the preceding
In Figure 18.5, the current is measured with the ammeter at the bottom of the circuit. When the switch is opened, does the reading on the ammeter (a) increase, (b) decrease, or (c) not change? Figure 18.5 (Quick Quizzes 18.3 and 18.4)

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