No earthing is required for the bulb . If you test it with a multimeter, you will find that the "loop" terminal doesn't connect to anything.
...to the two terminals of the battery (if we take the resistance of the light bulb to be small compared with the resistance of the voltmeter, and its presence...
...a practical voltmeter has a large resistance, the current flows through the bulb and voltmeter branch (you may just take the voltmeter as a resistor of very high resistance...
...then connected in series to the battery and the light bulb . When the slider moves, one variable resistor ...equivalent resistance of the circuit). Because brightness of the bulb decreases with decrease of current through it and vice versa...
.... Q3: To increase the contact surface area between the thermometer bulb and the holder. The thermometer thus can measure more accurately the temperature of liquid...
...name "alcohol thermometer" refers to a type of thermometer, in which a glass bulb connected to a capillary tube is filled with an organic liquid...
1. Let R be the resistance of each light bulb , and r be the resistance of the resistor. Hence, voltage... (1) and (2), it is clear that the new voltage across bulb R is smaller than before. Thus...
First, let a be the number of bulbs produced by production line A. Let...25b=-24x b=(24x)/25 So, the number of bulbs produced by production line B is...
Wet bulb temperature (濕球溫度) is measured by a wet- bulb thermometer (濕球溫度計...the evapouration of water during which latent heat is absorbed. A wet- bulb thermometer has a piece of cotton wrapped around the temperature sensitive region...
