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1. What is the magnetic effect of electric current?
Ans. The magnetic effect of electric current refers to the phenomenon where an electric current produces a magnetic field around it. This magnetic field can exert a force on other moving charges or on magnetic materials.
2. How is the magnetic field around a current-carrying conductor determined?
Ans. The magnetic field around a current-carrying conductor is determined by applying the right-hand rule. According to this rule, if we point the thumb of our right hand in the direction of the current, then the curled fingers will indicate the direction of the magnetic field lines around the conductor.
3. Can the strength of a magnetic field around a current-carrying conductor be increased?
Ans. Yes, the strength of the magnetic field around a current-carrying conductor can be increased by increasing the current flowing through the conductor. The magnetic field is directly proportional to the current, so increasing the current will result in a stronger magnetic field.
4. What is the role of a solenoid in creating a strong magnetic field?
Ans. A solenoid is a tightly wound coil of wire that produces a strong magnetic field when an electric current is passed through it. The magnetic field inside a solenoid is stronger and more uniform than the field around a straight current-carrying conductor. This makes solenoids useful in various applications such as electromagnets and inductors.
5. How does the magnetic effect of electric current find applications in everyday life?
Ans. The magnetic effect of electric current finds various applications in everyday life. Some common examples include electric motors, transformers, generators, and magnetic resonance imaging (MRI) machines. Electric motors convert electrical energy into mechanical energy using the magnetic effect of current, while transformers and generators utilize it for power transmission and generation. MRI machines use strong magnetic fields to produce detailed images of the human body.
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