Describe the working of a loudspeaker using the principles of magnetism and electricity.
Ans: A loudspeaker works by combining electricity and magnetism. When an electric current flows through a coil of wire attached to a diaphragm (a…
magnetic-effect
How are magnetic fields used in devices like transformers?
Ans: Magnetic fields play a crucial role in devices like transformers. Transformers use magnetic fields to transfer electrical energy between two coils of wire.…
What are the applications of electromagnets in daily life?
Ans: Here are the applications of electromagnets: Power generators, electric motors, and transformers Doorbells and buzzers Headphones and loudspeakers Relays and control valves Data…
What is the difference between direct current (DC) and alternating current (AC)?
Ans: Direct Current (DC) Alternating Current (AC) The electric charge flows in only one direction, from the positive terminal to the negative terminal. It…
Explain the working principle of an electric generator.
Ans: Electric generator works on the principle of electromagnetic induction. An electric generator is a device which convert mechanical energy to electric energy. The…
How does the direction of induced current change in a coil?
Ans: The direction of induced current in a coil follows Lenz’s Law, which states that it opposes changes in the magnetic field. If the…
What is electromagnetic induction, and how is it related to Faraday’s law?
Ans: Faraday’s Laws of Electromagnetic Induction are composed of two principles. The first law explains how emf (electromotive force) is generated in a conductor,…
How is a galvanometer used to detect and measure current in a circuit?
Ans: A galvanometer is a device used to detect and measure electric current in a circuit. It operates based on the principle of electromagnetic…
Describe the working principle of an electric motor.
Ans: An electric motor is a device that converts electrical energy into mechanical energy. Principle: In a basic electric motor, when an electric current…
What is an electromagnet, and how does it work?
Ans: Electromagnets are magnets whose magnetic field is generated by electricity. Unlike regular magnets that always have their magnetism, an electromagnet’s strength can be…
Explain the concept of a solenoid and its magnetic properties.
Ans: A coiled wire, wound closely and neatly into a cylinder shape, is called a solenoid, as you can see in the picture. The…
What is the right-hand thumb rule for determining the direction of the magnetic field?
Ans: We can determine the direction of the magnetic field around a current-carrying wire by following a guideline known as the “right-hand thumb rule.”…
How does a current-carrying conductor produce a magnetic field?
Ans: Electric current is basically how fast electric charge is moving. We already know that when charges stay in one place, they create an…
What is the magnetic effect of electric current?
Ans: When electricity flows through a wire, the wire acts like a magnet. This is called the magnetic effect of electric current. But if…