Current_Electricity_Biomedical_Physics_HirenJagani.pptx

Current electricity for the biomedical physics students

1. Current Electricity – Biomedical Physics BPT 1st Year | Silver Oak University Instructor: Hiren Jagani

2. Introduction Electricity is the flow of electric charge through a conductor. Used in ECG, EEG, stimulators. Essential for safe biomedical equipment use.

3. Energy Sources for Electricity Primary: Batteries, Solar Cells Secondary: Generators, Power supplies Biomedical: Portable ECG and Pacemakers use batteries.

4. Ohm’s Law V = IR Defines relation between Voltage, Current, and Resistance. Applied in designing biomedical circuits.

5. Rheostat – Construction & Working Variable resistor used to regulate current. Construction: Cylindrical coil with sliding contact. Used in electrotherapy equipment.

6. Thermal Effects of Current (Joule’s Law) H = I²Rt Heat produced in conductor is proportional to current squared. Biomedical: Used in diathermy machines.

7. Summary Points • Electric current = charge flow per time. • Resistance opposes current. • Ohm’s Law links V, I, R. • Joule’s Law explains heat production. • Basis for electrotherapy.