Questions from Modern Physics


Q: A ring-shaped conductor with radius a = 2.50

A ring-shaped conductor with radius a = 2.50 cm has a total positive charge Q = +0.125 nC uniformly distributed around it (see Fig. 21.23). The center of the ring is at the origin of coordinates O....

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Q: A straight, nonconducting plastic wire 8.50 cm long carries

A straight, nonconducting plastic wire 8.50 cm long carries a charge density of +175 nC/m distributed uniformly along its length. It is lying on a horizontal tabletop. (a). Find the magnitude and dir...

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Q: Point charges q1 = -4.5 nC and q2 =

Point charges q1 = -4.5 nC and q2 = +4.5 nC are separated by 3.1 mm, forming an electric dipole. (a). Find the electric dipole moment (magnitude and direction). (b). The charges are in a uniform ele...

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Q: The ammonia molecule (NH3) has a dipole moment of 5

The ammonia molecule (NH3) has a dipole moment of 5.0 × 10-30 C ∙ m. Ammonia molecules in the gas phase are placed in a uniform electric field

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Q: An electric dipole with dipole moment

An electric dipole with dipole moment

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Q: The dipole moment of the water molecule (H2O) is 6

The dipole moment of the water molecule (H2O) is 6.17 × 10-30 C ∙ m. Consider a water molecule located at the origin whose dipole moment

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Q: Three charges are at the corners of an isosceles triangle as shown

Three charges are at the corners of an isosceles triangle as shown in Fig. E21.57. The {±5.00-µC charges form a dipole. Figure E21.57: (a). Find the force (magnitude and...

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Q: A flat sheet of paper of area 0.250 m2 is

A flat sheet of paper of area 0.250 m2 is oriented so that the normal to the sheet is at an angle of 60 to a uniform electric field of magnitude 14 N/C. (a). Find the magnitude of the electric flux...

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Q: A negative charge -Q is placed inside the cavity of a

A negative charge -Q is placed inside the cavity of a hollow metal solid. The outside of the solid is grounded by connecting a conducting wire between it and the earth. Is any excess charge induced on...

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Q: flat sheet is in the shape of a rectangle with sides of

flat sheet is in the shape of a rectangle with sides of lengths 0.400 m and 0.600 m. The sheet is immersed in a uniform electric field of magnitude 90.0 N/C that is directed at 20 from the plane of th...

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