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Answer on Electromagnetism Question for Samuel

Question #51719
2 What are the dimensions of electrical resistance?
a. MLT −2 A −1 (b) M2L 2 TAL −2 (c) ML 2 T −3 A −2 (d) None of the above
3 Select the correct option from the following?
(a) electric field is a scalar quantity (b) electromotive force is a vector quantity (c) electric current is a scalar quantity (d) eletric potential is a vector quantity
4 Calculate the currents in 3ohms resistor
(a) 1.94A (b) 1.36A (c) 3.23A (d) 5.45A
A cirrent flows in a wire of circular cross-section with the free electrons travelling with a mean drift velocity v. If an equal current flows in a wire of the same material but of twice the radius, what is the new mean drift velocity?
(a) v/4 (b) v/2 (c) 2v (d) 4v
5 Which of the following is NOT correct?
(a) A changing electric field can produce a changing magnetic field (b) A steady magnetic field produces a steady current (c) A changing magnetic field can produce a changing current (d) A changing magnetic field can produce a steady electric field
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