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Tests 1 thru 4 Solutions

Tests 1 thru 4 Solutions - 5 6 7 4 9.6x10^ 16 N 8 5 A...

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4. 9.6x10^ Ͳ 16 # N 8
5. A uniform electric field of 300N/C makes an angle of 25 q with the dipole moment of an electric dipole. If the torque exerted by the field has a magnitude of 2.5x10 -7 N ¡ m, what must be the dipole moment? F + p E W u G G G 7 9 in scalar form sin (2.5 10 ) 2 0 10 pE N m C W T W 0 0 ¡ ¡ F Ͳ i 2.0 10 sin (300 / )sin 25 p C m E N C T ¢ ¡ ¡ x Ͳ axis 9

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6. Positive charge Q is distributed uniformly throughout an insulating sphere of radius R, centered at the origin. A particle with positive charge Q is placed at x = 2R on the x axis. What is the magnitude of the electric field at x = R/2 on the x axis? x R E S E P 3 2 At x= / 2 charged insulating sphere generates electric field Q = directed to the positive direction of x axis 4 2 8 S R Q R E R R SH SH § · ¨ ¸ © ¹ A particle with a positive charge Q placed at a ditance 3 / 2 from x= / o o R R 2 generates electric field directed to the negative direction of x axis with a magnitude Q Q E 2 2 9 3 4 2 The resultant electric field at x= / 2 is directed to the positive direction of x axis p o o R R R SH SH § · ¨ ¸ © ¹ Q Q Q 10 an 2 2 2 d has magnitude of 8 9 72 o o o E R R R SH SH SH 0
7.

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Tests 1 thru 4 Solutions - 5 6 7 4 9.6x10^ 16 N 8 5 A...

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