Which of the following devices is the more accurate one for the measurement of emf? a) Meter Bridge b) Voltmeter c) Multimeter d) Potentiometer
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Which of the following devices is the more accurate one for the measurement of emf?
a) Meter Bridge
b) Voltmeter
c) Multimeter
d) Potentiometer
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- Given the figures below, determine in each figure which resistances are connected in series and which are connected in parallel, then solve for the total resistance if all resistances are 100 ohms eachRobert uses an old ammeter to measure the current flowing through a section of a circuit he has built. His computer has correctly determined that the actual current is 323 milliamperes, but the ammeter is showing that the current is 347 milliamperes. What is the percent error of the ammeter reading?The following table contains current/voltage pairs of points as determined from an experiment to verify Ohm's Law. a) Use graph paper and plot these points as voltage vs. current. b) Does this device follow Ohm's Law? How do you know? c) Determine the value of the resistor used in this circuit. Note: The table is in the image.
- 13 A student is attempting to create a circuit that will generate the maximum amount of heat possible. All resistors have equivalent length, area, and shape. Resistance Materials Resistance Material (요) Aluminum 2.7 Germanium 1,500,000 Quartz 7,500,000,000 Silver 1.6 Which of the following would be most effective in generating heat? A Aluminum B Germanium C Quartz D SilverDraw a schematic circuit diagram showing a DC power source and two light bulbs connected in series, which in turn are connected to two light bulbs and a motor, all connected in parallel with each other. The complete circuit is controlled by one switch and protected by a fuse. An ammeter is connected to measure the current through the motor and a voltmeter measures the voltage of the DC power source.2 A physics teacher has just demonstrated how a certain component in a circuit can cause the electrical current to decrease over time. Which of the following values shows this measurement in the correct SI base units?
- What is the resistance of a lightbulb that uses an average power of 75,0 W when connected to a 60.0-Hz power source having a maximum voltage of 170 V (b) What What is the resistance of a 100-W lightbulb2. A 0.30-m-long metal bar is moving to the left at constant speed of 20 m/s perpendicular to a uniform 2.0 T magnetic field. The bar rides on parallel metal rails connected through a 6.00 resistor, so the apparatus makes a complete circuit, as shown in the figure below. Ignore the resistance of the bar and the rails.In the diagrams below, all light bulbs and all emf devices are identical. In which circuit (A, B, C, D, E) will the bulbs glow with the same brightness as in circuit X? A В X D E В. С. D. Е. A. B.