Important Points to Remember for Electricity | Science Class 10

Points to Remember - Electricity | Science

Electricity (Science) - Points to Remember

• The magnitude of current is defined as the rate of flow of charges in a conductor.
• The SI unit of electric current is ampere (A).
• The SI unit of electric potential and potential difference is volt (V).
• An electric circuit is a network of electrical components, which forms a continuous and closed path for an electric current to pass through it.
• The parameters of conductors like its length, area of cross-section and material, affect the resistance of the conductor.
• SI unit of electrical resistivity is ohm metre. The resistivity is a constant for a given material.
• The reciprocal of electrical resistivity of a material is called its electrical conductivity. \(\sigma = 1/\rho\)
• The passage of electric current through a wire results in the production of heat.
• This phenomenon is called heating effect of current.
• One horse power is equal to 746 watts.
• The function of a fuse wire or a MCB is to protect the house hold electrical appliances from excess current due to overloading or a short circuit.