Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
A. 4 : 25
B. 25 : 4
C. 2 : 5
D. 5 : 2
Similar Posts
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__________?
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. unchangedHow many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
A. 10
B. 60
C. 600
D. 12001 Ampere current means flowing of 1 Coulomb charge per second. That means 10 A current in 1 minute or 60 seconds implies 10 × 60 = 600 coulombs.
The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?
The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?
A. 1.2 x 10~8 Q-m
B. 1.4 x 10~8 Q-m
C. 1.6 x 10″”8 Q-m
D. 1.8 x 10″8 Q-mA 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 tapgThree 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ___________?
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 QWhich of the followings is/are active element?
Which of the followings is/are active element?
A. Voltage source
B. Current source
C. Both
D. None of these.Active elements are capable of delivering energy independently for long time or ideally infinite time. Both voltage and current source are active element and they can change energy level of a circuit.