Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners?
A. 3/2 Q
B. 6 Q
C. 4 Q
D. 8/3 Q
Category: Engineeeing Mcqs
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be __________?
A. 9 times
B. 1/9 times
C. 1/3 times
D. 3 times
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will __________?
A. decrease
B. increase
C. remain constant
D. none of the above
A substance whose molecules consist of dissimilar atoms is called __________?
A. semi-conductor
B. super-conductor
C. compound
D. insulator
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes __________?
A. 1/9 times
B. 3 times
C. 9 times
D. unchanged
A field of force can exist only between __________?
A. two molecules
B. two ions
C. two atoms
D. two metal particles
Sparking occurs when a load is switched off because the circuit has high __________?
A. resistance
B. inductance
C. capacitance
D. impedance
For testing appliances, the wattage of test lamp should be __________?
A. very low
B. low
C. high
D. any value
Switching of a lamp in house produces noise in the radio. This is because switching operation produces __________?
A. arcs across separating contacts
B. mechanical noise of high intensity
C. both mechanical noise and arc between contacts
D. none of the above
Bulbs in street lighting are all connected in __________?
A. parallel
B. series
C. series-parallel
D. end-to-end
