Current and Ohm's Law ?
(a)
A lightbulb has a resistance of 210 Ω when operating with a potential difference of 125 V across it. What is the current in the lightbulb (in mA)?
mA
(b)
What If? What would be the current in the lightbulb (in mA) if it were used in Peru, where the potential difference across it would be 220 V?
mA
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2. -/1 points SerPSE9 27.P.014.WI. A lightbulb has a resistance of 200 n when operating with...
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2. -/1 points SerPSE9 27.P.014.WI. A lightbulb has a resistance of 200 n when operating with a potential deference of 160 V across it. What is the current in the lightbulb? MA
Pre-lab EM-5 Ohm's Law and Kirchhoff's Rules Ohm's Law The resistance R of a device can be determined by either directly measuring the resistance using an ohmmeter, or by measuring the current I through it and the voltage Vacross it, and then calculating R using Ohm's Law V R= (1) If the voltage across a resistor is 10V, and the current passing through it is 2.5 mA. of the resistor? What is the resistance R= Ω. Kirchhoffs Loop Rule Around...
Exercise 2. An instrument used to measure current is called an ammeter. The ammeter is connected into a circuit in series in the loop in which the desired current reading is required. The resistance of an ideal ammeter is zero, and it is essential in real ammeters that the resistance of the instrument be very small compared to other resistances in the circuit. Why? R2 Ri a)-A meter to measure potential difference is called a voltmeter. To find the potential...
I need the answers to these ten questions. I have attached them
below. Please answer them all. Many many thanks in advance!!
When a torch is brought 2 times closer, how many times brighter will it appear? O 16 A diffraction grating that contains 650472 lines/m is illuminated by monochromatic light (λ-632.8 nm) from a helium-neon laser directed perpendicular to the surface of the grating. What is the angle for the second order maxima to occur? 24° O 45 48...
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