Is there a way to measure how much electricity a person has received, for instance after an electric

There is no residual electrical charge or voltage left in a person after receiving an electric shock, making direct measurement of the amount of electricity received impossible. The damage caused by the shock can sometimes be used to estimate the current involved, which is the primary factor in injury severity. Fatal shocks typically occur around 100mA, while higher currents cause burns and tissue damage. Devices like RF field strength meters can detect radio frequency or microwave energy but cannot measure low-frequency AC current directly. Low-frequency AC can be detected using an amplifier and coil or sensitive AM radios. Infrasonic audio frequencies (below 20 Hz) may cause physiological effects such as nausea and disorientation and can be measured with sound level meters, though these are unrelated to electrical measurement. Non-lethal crowd control devices emitting microwave or RF energy may cause temperature increases detectable by specialized sensors, but no handheld device exists to "wave over" a person to measure electrical exposure post-shock.
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