A solduring rod iron draws an energy of 45.000 joule in 4 minutes when...
Suppose that ...
t = 240s (4 minute = 240 seconds)
I = 6 A
H = 45000
Let us find from the equation….
H = I²Rt
45000 = 6² × R × 240
45000 = 36 × R × 240
45000 = R × 36 × 240
45000 = R × 8640
R = 45000/8640
R = 5.20 ohm
Therefore resistance of heating element is 5.20 ohm.
HOPE IT HELPS:)
A solduring rod iron draws an energy of 45.000 joule in 4 minutes when...
Calculation of Resistance of a Soldering Rod Iron
Given:
- Energy drawn by the soldering rod iron = 45,000 joules
- Time taken to draw the energy = 4 minutes
- Current flowing through the element = 6 Amphere
Formula:
- Power = Current x Voltage
- Energy = Power x Time
- Voltage = Current x Resistance
- Resistance = Voltage / Current
Calculation:
- First, we need to calculate the power of the soldering rod iron.
- Power = Current x Voltage
- Voltage is not given, but we can calculate it using Ohm's law.
- Voltage = Current x Resistance
- We can rearrange this equation to get the resistance.
- Resistance = Voltage / Current
- Now, we can calculate the energy consumed by the soldering rod iron.
- Energy = Power x Time
- Energy = (Current x Voltage) x Time
- Energy = Current x Resistance x Time
- Substituting the given values, we get:
- Energy = 45,000 joules
- Time = 4 minutes = 240 seconds
- Current = 6 Amphere
- Energy = Current x Resistance x Time
- 45,000 = 6 x Resistance x 240
- Resistance = 45,000 / (6 x 240)
- Resistance = 31.25 ohms
Answer:
The resistance of the soldering rod iron is 31.25 ohms.
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