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Author Archives: Anonymous

In this photon interaction, the emitted photon energy does n…

In this photon interaction, the emitted photon energy does not change.

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Two identical light bulbs will glow brighter when connected…

Two identical light bulbs will glow brighter when connected in

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Why do hospitals use 3-phase voltage in their electrical sys…

Why do hospitals use 3-phase voltage in their electrical systems?

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What is the efficiency of x-ray production if a tungsten tar…

What is the efficiency of x-ray production if a tungsten target (Z = 74) is hit with electrons of 88.65 keV of energy? (Hint: this is not in units of percent, %)

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A light bulb operates at a voltage of 1200 mV and has a resi…

A light bulb operates at a voltage of 1200 mV and has a resistance of 24 Ω. What is the current flowing through the bulb? Answer in Ampere

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An electrical heater has a current of 10 A and is connected…

An electrical heater has a current of 10 A and is connected to a 230 V supply. What is the power rating of the heater? Answer in Watts

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What unit is defined as the rate of one coulomb per second?

What unit is defined as the rate of one coulomb per second?

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A transformer has a primary coil with 1000 turns and a secon…

A transformer has a primary coil with 1000 turns and a secondary coil with 200 turns. If the input voltage is 100V to the primary side, what is the output voltage?

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How does a higher filament current in the cathode effect the…

How does a higher filament current in the cathode effect the tube current?

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What moves in a wire that is carrying a current?

What moves in a wire that is carrying a current?

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