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Answered on 15 Apr Learn Unit IV: Effects of Current
Sadika
Answered on 15 Apr Learn Unit IV: Effects of Current
Sadika
Answered on 15 Apr Learn Unit IV: Effects of Current
Sadika
Domestic appliances typically use parallel connections. This is because in parallel connections, each appliance gets the full voltage of the power supply, ensuring consistent operation regardless of the other appliances in the circuit. Additionally, if one appliance fails or is turned off, it does not affect the operation of other appliances connected in parallel.
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Answered on 15 Apr Learn Unit IV: Effects of Current
Sadika
To calculate the energy consumed by the electric bulbs in the month of February, first, we calculate the energy consumed by the 250-watt bulb and the four 6-watt bulbs separately. Then, we sum up the total energy consumed. Energy consumed by the 250-watt bulb in 5 hours = 250×5/1000 kWh Energy consumed by each 6-watt bulb in 4.5 hours = 6×4.5×4/1000 kWh Total energy consumed in the month of February = Energy consumed by the 250-watt bulb + Energy consumed by the four 6-watt bulbs
read lessAnswered on 15 Apr Learn Unit IV: Effects of Current
Sadika
Answered on 15 Apr Learn Unit IV: Effects of Current
Sadika
Joule's law states that the heat produced in a resistor is directly proportional to the square of the current passing through it and the resistance of the resistor. Mathematically, H=I²×R, where H is the heat produced, I is the current, and R is the resistance. To find the current, I=P/V and then use Ohm's law to find resistance R=V/I
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Answered on 15 Apr Learn Magnetic Effects of Electric Current
Sadika
Answered on 15 Apr Learn Magnetic Effects of Electric Current
Sadika
Answered on 15 Apr Learn Magnetic Effects of Electric Current
Sadika
A fuse is placed in series with an electrical appliance in a circuit to protect the appliance and the circuit from damage due to excessive current. A fuse with a defined rating should not be replaced by one with a larger rating because a larger-rated fuse may allow too much current to pass through the circuit, risking damage to the appliance and causing a potential fire hazard.
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Answered on 15 Apr Learn Magnetic Effects of Electric Current
Sadika
Induced current in a circuit can be generated by electromagnetic induction, which occurs when a change in magnetic flux through a closed circuit induces an electromotive force (emf) that causes current to flow. This can be achieved by moving a magnet near a coil of wire or by changing the magnetic field strength through the coil.
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