Effects of electric current — Chapter Summary
Maharashtra Board · Class 10 · Science
Summary of Effects of electric current for Maharashtra Board Class 10 Science. Part of the Maharashtra Board Class 10 Science syllabus.
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Overview
Notice how one current can do three different things: transfer energy, produce heat, and create magnetism. Count the links carefully: a cell sends energy through a circuit, a resistor turns that energy into heat, and a current-carrying wire creates a magnetic field around it. The same magnetic effec
Key Concepts
When charge moves from one point
When charge moves from one point to another in a circuit, the cell supplies energy to the resistor. This energy does work and is converted into heat i
Electrical power is the rate at
Electrical power is the rate at which electrical energy is used. The formula is P = V_AB × I, where P is power, V_AB is potential difference, and I is
When current flows through a resistor
When current flows through a resistor, heat is produced. The heat produced is H = P × t = V_AB × I × t. Using Ohm's law, it can also be written as H =
Heat produced in a resistor
Heat produced in a resistor is proportional to the square of current, resistance, and time. The formula is H = I² × R × t.
1 kWh = 1000 W ×
1 kWh = 1000 W × 3600 s = 3.6 × 10^6 J. One kWh of electrical energy is called one unit of energy in billing.
Learning Objectives
- Understand how electrical energy is transferred in a circuit
- Explain the heating effect of electric current
- Use the formulas for electrical power and heat produced in a resistor
- Understand the meaning of kilowatt-hour and the electricity bill unit
- Explain the magnetic effect of current in a straight wire, loop, and solenoid
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