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Home » GAT Subject » Aptitude Test - 245
Hassan
1.The barrier potential accross each depletion layer is
A. 0
B. 0.8 V
C. 0.7 V
D. 0
2.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
3.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
4.The basic unit of measurement for resistance is the:
A. volt
B. ampere
C. ohm
D. volt
5.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
6.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
7.The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
A. Strong
B. Neutral
C. Weak
D. Strong
8.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
9.Absolute Zero temperature equals
A. 0o C
B. -273o C
C. -276o C
D. 0o C
10.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
11.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
12.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
13.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
14.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
15.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
16.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
17.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
18.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
19.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
20.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
21.A device that converts light energy to electrical energy is called a:
A. thermocouple
B. solar cell
C. photodiode
D. thermocouple
22.How much current flows through a 60-W light bulb that is operating at 120 V?
A. 0.5A
B. 180 A
C. 2:00 AM
D. 0.5A
23.What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
A. 3 W
B. 6 W
C. 64 W
D. 3 W
24.Which one of the following kinds of materials has the highest permeability?
A. A diamagnetic material
B. A ferromagnetic material
C. A paramagnetic material
D. A diamagnetic material
25.Inductive reactance is measured in units of:
A. volts per second
B. amperes per second
C. Ohm
D. volts per second
26.What is the difference between the kinds of charges for an electron and a proton?
A. An electron has a positive charge and a proton has no charge
B. An electron has a positive charge and a proton has a negative charge
C. An electron has a negative charge and a proton has a positive charge
D. An electron has a positive charge and a proton has no charge
27.An ideal voltage source has
A. Zero internal resistance
B. Infinite internal resistance
C. A load dependent voltage
D. Zero internal resistance
28.A transistor has how many doped regions?
A. 1 region
B. 2 regions
C. 3 regions
D. 1 region
29.The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?
A. 0.93 W
B. 0.93 V
C. 1:00 AM
D. 0.93 W
30.A loadstone is:
A. a natural magnet
B. a temporary magnet
C. an artificial magnet
D. a natural magnet
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