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A magnetic circuit requires 800 AT to produce a certain quantity of flux in the magnetic circuit. If the excitation coil has 100 turns and 5W resistance, the voltage to be applied in the excitingcoil is
- a)60 V
- b)40 V
- c)80 V
- d)8 V
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
A magnetic circuit requires 800 AT to produce a certain quantity of fl...
AT=i*t =8*100=800at i=8A V=i*r 8*5=40v
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A magnetic circuit requires 800 AT to produce a certain quantity of fl...
To determine the voltage to be applied in the exciting coil, we need to calculate the current flowing through the coil first. We can use Ohm's law to do this.
Given data:
- Magnetic circuit requires 800 AT (ampere-turns)
- Excitation coil has 100 turns
- Excitation coil has a resistance of 5 Ω (ohms)
**Calculating the current:**
Using Ohm's law, we can calculate the current (I) flowing through the excitation coil:
V = I * R
Here, V is the voltage, I is the current, and R is the resistance.
Substituting the given values:
V = I * 5
We need to find the value of V.
**Calculating the current flowing through the coil:**
To calculate the current (I), we need to find the ampere-turns (AT) first.
The ampere-turns (AT) is given by:
AT = N * I
Here, N is the number of turns and I is the current.
Substituting the given values:
800 = 100 * I
Solving for I:
I = 800 / 100
I = 8 A (ampere)
**Calculating the voltage:**
Now that we have the current (I) flowing through the coil, we can find the voltage (V) using Ohm's law:
V = I * R
Substituting the values:
V = 8 * 5
V = 40 V
Therefore, the voltage to be applied in the exciting coil is 40 V, which corresponds to option (b).
Given data:
- Magnetic circuit requires 800 AT (ampere-turns)
- Excitation coil has 100 turns
- Excitation coil has a resistance of 5 Ω (ohms)
**Calculating the current:**
Using Ohm's law, we can calculate the current (I) flowing through the excitation coil:
V = I * R
Here, V is the voltage, I is the current, and R is the resistance.
Substituting the given values:
V = I * 5
We need to find the value of V.
**Calculating the current flowing through the coil:**
To calculate the current (I), we need to find the ampere-turns (AT) first.
The ampere-turns (AT) is given by:
AT = N * I
Here, N is the number of turns and I is the current.
Substituting the given values:
800 = 100 * I
Solving for I:
I = 800 / 100
I = 8 A (ampere)
**Calculating the voltage:**
Now that we have the current (I) flowing through the coil, we can find the voltage (V) using Ohm's law:
V = I * R
Substituting the values:
V = 8 * 5
V = 40 V
Therefore, the voltage to be applied in the exciting coil is 40 V, which corresponds to option (b).
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A magnetic circuit requires 800 AT to produce a certain quantity of flux in the magnetic circuit. If the excitation coil has 100 turns and 5W resistance, the voltage to be applied in the excitingcoil isa)60 Vb)40 Vc)80 Vd)8 VCorrect answer is option 'B'. Can you explain this answer?
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