Electronic Principles Computer Test Series - Set 07 - ObjectiveBooks
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# Practice Test: Question Set - 07

1. Which one of the following statements is true?
(A) The secondary voltage for a step-down power transformer is greater than the primary voltage
(B) The secondary current for a step-down power transformer is greater than the primary voltage
(C) Parallel RLC circuit operated below its resonant frequency
(D) Purely resistive circuit

2. The nucleus of the copper atom contains how many protons?
(A) 1
(B) 4
(C) 19
(D) 29

3. Who invented the first junction transistor?
(A) Smith
(B) Gomes
(C) Fisher
(D) Shockley

4. Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?
(A) 100 V
(B) 120 V
(C) 170 V
(D) 180 V

5. The equivalent of 1 megohms is:
(A) 1 k ohm
(B) 100,000 ohm
(C) One-millionth of an ohm
(D) One million ohms

6. What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?
(A) 220 ohm
(B) 150 ohm
(C) 445 ohm
(D) 690 ohm

7. Which one of the following is a statement of Kirchhoffs current law?
(A) The current through a resistance is proportional to the value of resistance and the IR drop across it
(B) The total current in a parallel circuit is less than the value of the smallest current
(C) The algebraic sum of currents in a loop is equal to zero
(D) The algebraic sum of currents entering and leaving a point is equal to zero

8.A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?
(A) 2 k Ohm
(B) 10 k Ohm
(C) 20 k Ohm
(D) 1 k Ohm

9. One henry of inductance is defined as:
(A) The amount of counter emf required to reduce a current to 1 A
(B) The amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
(C) The amount of inductance required to change the frequency of a current by 1 Hz
(D) The number of turns of wire in an inductor multiplied by the amount of current flowing through it

10. Doubling the operating frequency of a capacitive circuit:
(A) Doubles the amount of a capacitive reactance
(B) Has no effect on the capacitive reactance
(C) Cuts the capacitive reactance in half
(D) Multiplies the capacitive reactance by 6.28

11. As the temperature increases, the current gain
(A) Increases
(B) Decreases
(C) Constant
(D) Can be any of the above

12. The value of a capacitor can be made larger by:
(A) Moving the plates further apart
(B) Moving the plates closer together
(C) Increasing the voltage applied to the plates
(D) Decreasing the voltage applied to the plates

13. What kind of device is a diode?
(A) Bilateral
(B) Linear
(C) Nonlinear
(D) Unipolar

14. Current can flow through a normally open push button switch as long as:
(A) You are pressing the button
(B) You are not pressing the button
(C) Its contact remain open
(D) Its contact remain open

15. A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode?
(A) 55 A
(B) 55.86 A
(C) 18.2 mA
(D) 16.3 mA

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