What happens if a fuse blows in a circuit?
If a fuse blows, it breaks the circuit and stops the flow of current, protecting the appliances and preventing overheating or fire hazards. The fuse must be replaced to restore the connection.
Why is the electricity supplied to our homes AC and not DC?
Alternating current (AC) is used for domestic supply because it is more efficient for transmitting electricity over long distances. AC can be easily transformed to different voltage levels, which reduces energy losses in transmission.
What is the difference between a fuse and an MCB?
A fuse is a one-time safety device that melts and breaks the circuit if excess current flows. An MCB (Miniature Circuit Breaker) automatically trips during overload or short circuits but can be reset after the fault is corrected.
What is the function of the earth wire in domestic circuits?
The earth wire provides a low-resistance path for leakage currents to flow into the ground. It protects users from electric shocks by safely directing excess current away from the appliance in case of a fault.
Why are appliances connected in parallel in domestic circuits?
Appliances are connected in parallel in domestic circuits to ensure that each receives the same voltage and operates independently. This setup also allows individual control of devices, so if one appliance fails, the others continue to function.
How does the current affect the force on a conductor in a magnetic field?
The force on a conductor in a magnetic field is directly proportional to the current flowing through the conductor. If the current increases, the force also increases.
What happens when a current-carrying conductor is placed in a magnetic field?
When a current-carrying conductor is placed in a magnetic field, it experiences a force. The direction of this force is perpendicular to both the current and the magnetic field, and its magnitude depends on the current, the magnetic field strength, and the length of the conductor.
What is a solenoid, and how does it create a magnetic field?
A solenoid is a long coil of wire with multiple turns. When current flows through the solenoid, it creates a strong and uniform magnetic field inside. A solenoid with an iron core can act as an electromagnet, which is used in various devices.
How does the number of turns in a circular loop affect the magnetic field?
The strength of the magnetic field inside a circular loop increases with the number of turns. More turns create a stronger magnetic field at the center of the loop.
What is the effect of increasing the current on the magnetic field?
Increasing the current increases the strength of the magnetic field around the conductor. The magnetic field strength is directly proportional to the current.
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