Maharashtra Board Effects of Electric Current PDF

Here\'s a model question paper with answers on the effects of electric current for Maharashtra Board: Q: Explain the heating effect of electric current. A: The heating effect of electric current occurs when electric current flows through a conductor, causing it to heat up due to resistance. Th...

Here\'s a model question paper with answers on the effects of electric current for Maharashtra Board: Q: Explain the heating effect of electric current. A: The heating effect of electric current occurs when electric current flows through a conductor, causing it to heat up due to resistance. This effect is used in appliances like electric heaters and light bulbs. Q: What is the magnetic effect of electric current? A: The magnetic effect of electric current refers to the creation of a magnetic field around a current-carrying conductor. This effect is the basis for electromagnets and electric motors. Q: Describe the chemical effect of electric current. A: The chemical effect of electric current is the process of electrolysis, where electrical energy causes chemical reactions. This effect is used in electroplating and in the production of certain chemicals. Q: What is electromagnetic induction? A: Electromagnetic induction is the production of an electromotive force (EMF) across an electrical conductor when it is exposed to a varying magnetic field. This principle is used in generators and transformers. Q: Explain the working principle of an electric motor. A: An electric motor converts electrical energy into mechanical energy using the magnetic effect of current. It consists of a rotating armature (rotor) within a stationary magnetic field (stator). Q: Describe the components of a typical domestic circuit. A: A typical domestic circuit includes a main switch, MCB (Miniature Circuit Breaker), fuse, earth wire, live wire, neutral wire, and various electrical outlets and appliances. Q: List three ways to conserve electrical energy at home. A: 1. Use energy-efficient LED bulbs 2\. Turn off appliances when not in use 3\. Use natural light and ventilation when possible Q: What is the function of a fuse in an electrical circuit? A: A fuse is a safety device that melts and breaks the circuit when excessive current flows, protecting the circuit and appliances from damage. Q: How does an electric bell work? A: An electric bell works on the principle of electromagnetic induction. When current flows, an electromagnet attracts an iron armature, which strikes the bell. When the circuit breaks, the armature springs back, repeating the process. Q: What is the difference between AC and DC current? A: AC (Alternating Current) periodically reverses direction, while DC (Direct Current) flows in only one direction. AC is used in household supply, while DC is used in batteries and electronic devices.