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Home » GAT Subject » Computer Science » Aptitude Test - 117
1.A device that converts light energy to electrical energy is called a:
A. thermocouple
B. solar cell
C. photodiode
D. thermocouple
2.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
3.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
4.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
5.Inductive reactance is measured in units of:
A. volts per second
B. amperes per second
C. Ohm
D. volts per second
6.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
7.An ideal voltage source has
A. Zero internal resistance
B. Infinite internal resistance
C. A load dependent voltage
D. Zero internal resistance
8.A transistor has how many doped regions?
A. 1 region
B. 2 regions
C. 3 regions
D. 1 region
9.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
10.A loadstone is:
A. a natural magnet
B. a temporary magnet
C. an artificial magnet
D. a natural magnet
11.Which one of the following phrases most accurately describes a purely capacitive circuit?
A. Resistances provide the only opposition to current flow
B. Capacitive reactance provides the only opposition to current flow
C. The ac voltage leads the current by 90 degree
D. Resistances provide the only opposition to current flow
12.The saturation point is approximately the same as
A. cutoff point
B. lower end of the load line
C. upper end of the load line
D. cutoff point
13.Which one of the following statements is true for the currents in a series RC circuit?
A. The current always has the same amplitude and phase for every part of the circuit
B. The total current is equal to the sum of the currents for the resistance and capacitance
C. The total current is greater than the sum of the currents for the resistance and capacitance
D. The current always has the same amplitude and phase for every part of the circuit
14.The total inductance of a series inductor circuit is:
A. equal to the sum of the individual inductance values
B. equal to the sum of the individual inductive-reactance values
C. less than the value of the smallest inductor
D. equal to the sum of the individual inductance values
15.Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold
A. 220 Ohm, 5%
B. 220 Ohm, 10%
C. 22,000 Ohm, 5%
D. 220 Ohm, 5%
16.Which one of the following is most likely used for measuring the rate of electron flow?
A. Voltmeter
B. Ammeter
C. Wattmeter
D. Voltmeter
17.Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?
A. 20 Ohm
B. 30 Ohm
C. 10 Ohm
D. 20 Ohm
18.Which one of the following statements regarding ac circuits is correct?
A. Current and voltages are in phase through a resistor
B. Current leads the voltage through a resistor
C. Current lags the voltage through a resistor
D. Current and voltages are in phase through a resistor
19.Which one of the following statements most accurately describes the nature of inductive reactance?
A. Inductive reactance is an opposition to current flow in dc circuits
B. Inductive reactance is an opposition to current flow in ac circuits
C. Inductive reactance is another term for counter emf
D. Inductive reactance is an opposition to current flow in dc circuits
20.What are the main parts of an atom?
A. Protons only
B. Electrons, protons, and ions
C. Electrons, ions, and neutrons
D. Protons only
21.Current is
A. The flow of charged particles through a material
B. An imbalance of electrical charges
C. The force that causes electrons to flow
D. The flow of charged particles through a material
22.A real voltage source has
A. Zero internal resistance
B. Infinite internal resistance
C. A small internal resistance
D. Zero internal resistance
23.Which one of the following statements is true?
A. Current flows in a capacitor circuit only while ions are permitted to flow through the dielectric material
B. Current flows in a capacitor circuit only while the charge on the plates is large enough to force the dielectric to conduct electrons
C. Current can flow in a capacitor circuit, but not through the dielectric material itself
D. Current flows in a capacitor circuit only while ions are permitted to flow through the dielectric material
24.What is the total resistance of a series circuit that contains four resistors having values of 220W, 470W, 1W, and 1.2W?
A. 692.2 Ohm
B. 844.5 Ohm
C. 3890 Ohm
D. 692.2 Ohm
25.Holes act like:
A. Atoms
B. Crystals
C. Negative charges
D. Atoms
26.How may valence electrons does a silicon atom have?
A. 0
B. 1
C. 2
D. 0
27.Reducing the amount of current through an inductor:
A. reduces the value of inductance by one-half
B. multiplies the value of inductance by four
C. multiplies the value of inductance by two
D. reduces the value of inductance by one-half
28.Which one of the following statements best applies to a series RLC circuit?
A. The voltage waveform for each component always has the same amplitude and phase as the applied voltage
B. The current waveform for each component always has the same amplitude and phase as the applied current
C. All of the above
D. The voltage waveform for each component always has the same amplitude and phase as the applied voltage
29.When applying a square waveform to a capacitor, the circuit tends to:
A. peak the voltage and round off the current waveforms
B. peak the current and round off the voltage waveforms
C. round off both the voltage and current waveforms
D. peak the voltage and round off the current waveforms
30.Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?
A. Number of lines of force
B. Flux density
C. Reluctance
D. Number of lines of force
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