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.Management Sciences
Category: Basic Electrical Mcqs
The resistance of a conductor varies inversely as___________?
A. length
B. area of cross-section
C. temperature
D. resistivity
Which of the followings is/are active element?
A. Voltage source
B. Current source
C. Both
D. None of these.
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The condition for the validity under Ohm’s law is that_______________?
A. resistance must be uniform
B. current should be proportional to the size of the resistance
C. resistance must be wire wound type
D. temperature at positive end should be more than the temperature at negative end
Which of the following material has nearly zero temperature co-efficient of resistance_________?
A. Manganin
B. Porcelain
C. Carbon
D. Copper
A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?
A. 400 Q
B. 600 Q
C. 800 Q
D. 1000 Q
The minimum charge on an ion is______________?
A. equal to the atomic number of the atom
B. equal to the charge of an electron
C. equal to the charge of the number of electrons in an atom (#) zero
Varistors are______________?
A. insulators
B. non-linear resistors
C. carbon resistors
D. resistors with zero temperature coefficient
Whether circuit may be AC. or D. C. one, following is most effective in reducing the magnitude of the current?
A. Reactor
B. Capacitor
C. Inductor
D. Resistor
Bulbs in street lighting are all connected in_____________?
A. parallel
B. series
C. series-parallel
D. end-to-end
Which of the following are the passive elements?
A. Resistor
B. Bulb
C. Both
D. None of these.
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