Multiple Choice
A wire of radius R carries a current I.The current density is given by the function J = J0 (1 - r/R) where r is measured from the center of the wire and J0 is a constant.What is the value of J0 if I = 1A,R = 1.5 mm (in A/m2) ?
A) 3.18 * 10-1
B) 4.76 * 103
C) 1.06 * 105
D) 4.24 * 105
E) 2.12 * 105
Correct Answer:
Verified
Correct Answer:
Verified
Q35: When two resistors are connected in
Q36: A resistor of unknown resistance and
Q37: What is the current supplied by the
Q38: A potential difference of V =
Q39: Two resistors of resistance R are connected
Q40: Two identical light bulbs are connected to
Q41: What is the battery current I<sub>bat</sub> when
Q42: The emf (electromotive force)is an<br>A)electric force vector.<br>B)electric
Q43: A copper wire has a diameter
Q45: What is voltage across the 8