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Vera_Pavlovna [14]
3 years ago
6

An electric current is created in a long thin wire. How will increasing the current and changing the direction of the current ef

fect the direction that a compass placed under the wire will point?
A)
It compass will spin continuously.
B)
The compass will flip exactly 180 degrees.
C)
The compass will spin exactly 360 degrees.
D)
The compass will not react and still point north.
Physics
2 answers:
n200080 [17]3 years ago
8 0

Answer: The correct answer is B.

Explanation:

When the current is flowing through the vertical wire then the compass needle will points perpendicular to the wire.

When the direction of the electric current is reversed then the direction of the compass needle will also get reversed as the polarity of the magnetic field is changed.

An electric current is created in a long thin wire. When the current will increase and the direction of the current is changed then the compass will flip exactly 180 degree.

Therefore, the correct answer is B.

liubo4ka [24]3 years ago
4 0

B) The Compass will flip exactly 180 degrees.

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Answer:

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Explanation:

1.The electric field inside the conductor must be zero (conductor proprieties). Then the charges create a electric field equal an opposite to the external electric field. In other words E=1000N/C to the LEFT

2. The electric field inside a conductor in electrostatic state is always zero. As shown in the figure the electric field induced by the charges in the sphere surface cancelled the EXTERN electric field.

3.If the Electric field inside the conductor is zero, that means that the Voltage in the hole conductor is constant (conductor proprieties). In other words the the voltmeter read 0v as differential voltage between two points from the conductor.

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