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Home » GAT Subject » Computer Science » Aptitude Test - 116
1.How many protons does the nucleus of a silicon atom contain?
A. 4
B. 29
C. 14
D. 4
2.A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?
A. 3 V
B. 16 V
C. 7.5 V
D. 3 V
3.The emitter diode is usually
A. Forward-biased
B. Reverse-biased
C. Nonconducting
D. Forward-biased
4.1 Microfarad is the same as:
A. 1 millionth of a picofarad
B. 1000 millifarads
C. 1 million picofarads
D. 1 millionth of a picofarad
5.Which one of the following statements is true for resistance in a parallel circuit?
A. The total resistance is equal to the sum of the individual resistances in a parallel circuit.
B. The total resistance of a parallel circuit is always less than the value of the smallest resistance
C. The total resistance of a parallel circuit is equal to the total voltage
D. The total resistance is equal to the sum of the individual resistances in a parallel circuit.
6.The direction of conventional current flow is:
A. from negative to positive
B. from positive to negative
C. from left to right
D. from negative to positive
7.Doubling the operating frequency of a purely inductive circuit:
A. doubles the amount of current through the inductors
B. has no effect on the current through the inductors
C. cuts the current through the inductors one-half
D. doubles the amount of current through the inductors
8.The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:
A. One-half the primary current
B. Same as the primary current
C. Twice the primary current
D. One-half the primary current
9.What is a free electron?
A. An electron that has been freed from its parent atom
B. An electron that costs nothing
C. An electron that has no electrical charge
D. An electron that has been freed from its parent atom
10.To get the Norton current, you have to
A. Short the load resistor
B. Open the load resistor
C. Short the voltage source
D. Short the load resistor
11.The barrier potential accross each depletion layer is
A. 0
B. 0.8 V
C. 0.7 V
D. 0
12.Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?
A. Flux density
B. Number of lines of force
C. Magnetomotive force
D. Flux density
13.What kind of battery is most likely included in a cordless electric knife?
A. Zinc-carbon battery
B. Mercury-cell battery
C. Nicad battery
D. Zinc-carbon battery
14.The basic unit of measurement for resistance is the:
A. volt
B. ampere
C. ohm
D. volt
15.What is the phase shift between total current and voltage, if 100 ohm resistor connected in parallel with an inductor that has a reactance of 200W?
A. 0 degree
B. 26.6 degree
C. 90 degree
D. 0 degree
16.When operating below its resonant frequency, a series RLC circuit has the characteristics of a:
A. series RL circuit
B. series RC circuit
C. series RLC circuit operated above its resonant frequency
D. series RL circuit
17.The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
A. Strong
B. Neutral
C. Weak
D. Strong
18.Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?
A. 0.3 A
B. 0.2 A
C. 0.4 A
D. 0.3 A
19.Absolute Zero temperature equals
A. 0o C
B. -273o C
C. -276o C
D. 0o C
20.At cut off, the Q point is at
A. upper end of the load line
B. middle of the load line
C. lower end of the load line
D. upper end of the load line
21.Which one of the following statements is true?
A. Capacitive reactance is at a minimum for dc source voltages
B. Capacitive reactance decreases as the operating frequency increases
C. There is no meaningful relationship between capacitive reactance and operating frequency
D. Capacitive reactance is at a minimum for dc source voltages
22.The peak value of a sine waveform is:
A. the amplitude at 70.7% of the maximum value
B. the amplitude at 90% of the maximum value
C. the amplitude at 1.41 times the maximum value
D. the amplitude at 70.7% of the maximum value
23.Which one of the following statements is true for voltage in a parallel circuit?
A. The total voltage in a parallel circuit is equal to the average value of the individual voltages
B. The total voltage in a parallel circuit is always less than the value of the smallest voltage
C. The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
D. The total voltage in a parallel circuit is equal to the average value of the individual voltages
24.The dielectric constant of a material is a measure of:
A. the amount of voltage it can withstand before breaking down
B. how well the material concentrates electrostatic lines of force
C. the amount of opposition to the current flow
D. the amount of voltage it can withstand before breaking down
25.What is the inductive reactance of a 2-H coil operating at 60 Hz?
A. 754 Ohm
B. 30 Ohm
C. 60 Ohm
D. 754 Ohm
26.When operating above its resonant frequency, a series RLC circuit has the characteristics of a:
A. series RL circuit
B. series RC circuit
C. series RLC circuit operated below its resonant frequency
D. series RL circuit
27.What is the primary difference between primary and secondary cell batteries?
A. Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
B. Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
C. Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
D. Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
28.Which one of the following statements applies to common auto batteries?
A. Auto batteries are primary wet-cell batteries
B. Auto batteries are secondary wet-cell batteries
C. Auto batteries are secondary dry-cell batteries
D. Auto batteries are primary wet-cell batteries
29.Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?
A. P = IE
B. P = E2/R
C. P = I2R
D. P = IE
30.If N1/N2 = 2, and the primary voltage is 120 V, what is the secondary voltage?
A. 0 V
B. 36 V
C. 40 V
D. 0 V
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