Electronic Principles – Section 2

46. Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount  of resistance?

A. P = I²R
B. P = IE
C. P = E²/R
D. I = P/E
E. None of the above

47. The equivalent of 1 megohm is:

A. 1 k ohm
B. 100,000 ohm
C. one-millionth of an ohm
D. one million ohms
E. None of the above

48. Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?

A. E = PR
B. E = I²R
C. I = E/R
D. I = ER
E. None of the above

49. Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff?

A. 20 k Ohm or more
B. 200 k Ohm or less
C. 200 k Ohm or more
D. 20 km or less
E. None of the above

50. If the current gain is 200 and the collector current is 100 mA, the base current is

A. 2 mA
B. 0.5 mA
C. 2 A
D. 200 A
E. None of the above