1. A rod (length = 80 cm) with a rectangular cross section (1.5 mm x 2.0 mm) has

Question

1. A rod (length = 80 cm) with a rectangular cross section (1.5 mm x 2.0 mm) has a resistance of 0.20 ohms. What is the resistivity of the material used to make the rod? Select the correct answer.

* 3.0 x 10^-7 Ohm-m

* 7.5 x 10^-7 Ohm-m

* 3.8 x 10^-7 Ohm-m

* 6.0 x 10^-7 Ohm-m

* 4.8 x 10^-7 Ohm-m

2. A particle (mass 2.0 mg, charge -6.0 x 10^-6 ) moves in the positive direction along the x axis with a velocity of 3.0 km/s. It enters a magnetic field of (2.0i + 3.0j + 4.0k) mT. What is the acceleration of the particle?

* (-24j + 18k) m/s

* (24j-27k) m/s

* (36j-27k) m/s

* (24j-18k) m/s

* (-36j + 27k) m/s

3. Which of the following are the units of a henry and a farad respectively? Select the correct answer.

* J s /C and C /J

* N m/A and 1/J

* none of these answers

* V s/A and V/C

* V/(A s) and C/V

4. Name the four variables that are involved in Inductance.

5. Induced voltage, or Electromotive Force (Emf), is proportional to:

* magnetic flux

* magnetic field times area

* magnetic flux times area

* the rate of change of magnetic flux

Explanation / Answer

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