Physics, 12.08.2020 07:01, alexkrol30083

A 6.7 cm diameter circular loop of wire is in a 1.27 T magnetic field. The loop is removed from the field in 0.16 ss . Assume that the loop is perpendicular to the magnetic field. Required:
What is the average induced emf?

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answered: 20jacksone

The induced emf is $\epsilon = 0.0280 \ V$

Explanation:

From the question we are told

The diameter of the loop is $d = 6.7 cm = 0.067 \ m$

The magnetic field is $B = 1.27 \ T$

The time taken is $dt = 0.16 \ s$

Generally the induced emf is mathematically represented as

$\epsilon = - N * \frac{\Delta \phi}{dt}$

Where N = 1 given that it is only a circular loop

$\Delta \phi = \Delta B * A$

Where $\Delta B = B_f - B_i$

where B_i is 1.27 T given that the loop of wire was initially in the magnetic field

and B_f is 0 T given that the loop was removed from the magnetic field

Now the area of the of the loop is evaluated as

$A = \pi r^2$

Where r is the radius which is mathematically represented as

$r = \frac{d}{2}$

substituting values

$r = \frac{0.067}{2}$

$r = 0.0335 \ m$

A = 3.142 * (0.0335)^2

$A = 0.00353 \ m^2$

$\Delta \phi = (0- 127)* (0.00353)$

$\Delta \phi = -0.00448 Weber$

=> $\epsilon = - 1 * \frac{-0.00448}{0.16}$

=> $\epsilon = 0.0280 \ V$

answered: Guest

! 55 !

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.

you should have at least 5 complete sentences with a main idea and supporting details.

you must include the following words:

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

55 ! write a paragraph or story to explain the transformation between potential and kinetic energy

answered: Guest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

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A 6.7 cm diameter circular loop of wire is in a 1.27 T magnetic field. The loop is removed from the...