The ratio of mass of proton to that of electron is nearly_____________?
A. 1840
B. 1840
C. 30
D. 4
Basic Electrical Mcqs
Voltage dependent resistors are used_____________?
Voltage dependent resistors are used_____________?
A. for inductive circuits
B. to supress surges
C. as heating elements
D. as current stabilizers
Voltage dependent resistors are usually made from________________?
Voltage dependent resistors are usually made from________________?
A. Charcoal
B. Silicon Carbide
C. Nichrome
D. Graphite
All good conductors have high____________?
All good conductors have high____________?
A. conductance
B. resistance
C. reluctance
D. thermal conductivity
are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?
are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?
A. Varistors
B. Thermistor
C. Semi-conductors
D. Variable resistors
An open resistor, when checked with an ohm-meter reads_____________?
An open resistor, when checked with an ohm-meter reads_____________?
A. zero
B. infinite
C. high but within tolerance
D. low but not zero
A rheostat differs from potentiometer in the respect that it_____________?
A rheostat differs from potentiometer in the respect that it_____________?
A. has lower wattage rating
B. has higher wattage rating
C. has large number of turns
D. offers large number of tapg
Which of the following statement is correct_______________?
Which of the following statement is correct_______________?
A. A semi-conductor is a material whose conductivity is same as between that of a conductor and an insulator
B. A semi-conductor is a material which has conductivity having average value of conductivity of metal and insulator
C. A semi-conductor is one which con¬ducts only half of the applied voltage
D. A semi-conductor is a material made of alternate layers of conducting material and insulator
The condition for the validity under Ohm’s law is that_______________?
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
When current flows through heater coil it glows but supply wiring does not glow because______________?
When current flows through heater coil it glows but supply wiring does not glow because______________?
A. current through supply line flows at slower speed
B. supply wiring is covered with insulation layer
C. resistance of heater coil is more than the supply wires
D. supply wires are made of superior material