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anygoal [31]
4 years ago
9

Two coils are wound around the same cylindrical form. When the current in the first coil is decreasing at a rate of -0.245 A/s ,

the induced emf in the second coil has a magnitude of 1.60×10−3 V . Part A What is the mutual inductance of the pair of coils? MM = nothing H Request Answer Part B If the second coil has 22 turns, what is the flux through each turn when the current in the first coil equals 1.25 A ? ΦΦ = nothing Wb
Physics
1 answer:
Nezavi [6.7K]4 years ago
7 0

To solve this problem we need to use the emf equation, that is,

E=m\frac{dI}{dT}

Where E is the induced emf

I the current in the first coil

M the mutual inductance

Solving for a)

M=\frac{E}{\frac{dI}{dT}}\\M=\frac{1.6*10^{-3}}{0.245}=6.53*10^{-3}H

Solving for b) we need the FLux through each turn, that is

\Phi=\frac{MI}{N}

Where N is the number of turns in the second coil

\Phi=\frac{6.53*10^{-3}*1.25}{22}=3.71*10^{-4}Wb

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A string of length 0.67 m and mass 2.0 g is held at both ends under tension. The string
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Answer:

The value is \lambda = 0.335 \  m  

Explanation:

From the question we are told that

     The length of the string is  l  =  0.67 \  m

      The mass is  m  = 2.0 \  g  =  0.002 \  kg

      The frequency produced at  fourth harmonic vibration(i.e n =4 )  is  f =  700 \  Hz

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Oxygen at 50 lbf/in.2, 200 F is in a piston/cylinder arrangement with a volume of 4 ft3. It is now compressed in a polytropic pr
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Answer:

The value of heat transfer during the process Q = - 29.49 KJ

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T_{1} = 200 F = 366.4 K

T_{2} = 400 F = 477.6 K

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From ideal gas equation

P_{1} V_{1} = m R T_{1}

Put all the values in above equation we get

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⇒ m = 0.408 kg

Heat transfer in poly tropic process is given by

Q = \frac{\gamma - n}{( \gamma - 1)( n - 1)} [ {m R (T_{1} - T_{2}  ) ]

Put all the values in above formula we get

⇒ Q = \frac{1.4 - 1.2}{( 1.4 - 1)( 1.2 - 1)} [ {m R (T_{1} - T_{2}  ) ]

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⇒ Q = - 29.49 KJ

This is the value of heat transfer during the process & negative sign shows that  heat is lost during the process.

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