It is called an electroscope.
A static electric charge can be detected directly by a device called an Ishmoo. It has a plate on top and a plate inside. The inside plate moves a mirror and it reflects a light slit onto the meter face and reads out static voltage. A standard electric voltage meter today, A VOM, would have an attenuator switch and read out digitally.
An electroscope is a device that can detect the presence of electric charge. It is typically used to determine whether an object is charged positively or negatively. When an electroscope detects an electric charge, the metal leaves inside the device will either repel or attract each other, indicating the presence of charge.
An electrometer is a device that detects electric charges by measuring the voltage or current associated with the charges.
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One that is controlled by a Photo-Electric device that detects darkness OR One that is controlled by a Clock Timer.
A device that disconnects a circuit when ever it detects the electric current is lower than the rated current.
An Electro Explosive device is a bomb that is triggered by an electric charge.
A capacitor is a device used for storing electric charge. It consists of two conductive plates separated by an insulating material, which stores energy in an electric field when a voltage is applied across the plates.
a gold leaf electroscope. if initially charged negatively, the deflection of the leaf with respect to the electroscope is increased if a negatively charged object approaches the electroscope. conversely if a positively charged object approaches, the deflection is reduced. the angle of deflection is proportional to the magnitude of the charge.
A capacitor stores an electric charge. An inductor stores a magnetic charge.
A gold-leaf electroscope is a device that detects electric charges. It consists of thin gold leaves attached to a conductor that can be charged. When the leaves are charged, they repel each other due to electrostatic forces. This device is commonly used in physics experiments to detect the presence of electric charges.
An electroscope detects an electric charge by using the principle of electrostatic induction. When a charged object comes near the electroscope, it induces a separation of charge within the electroscope, causing the leaves to either repel or attract each other depending on the type of charge present. This movement of the leaves indicates the presence and type of electric charge.
A Geiger-Muller detector is commonly used to measure radiation by producing an electric current when it detects a charged particle. This device contains a gas-filled tube that ionizes when radiation passes through, allowing for the generation of an electric signal that can be measured.