With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
A. 10 W
B. 20 W
C. 40 W
D. 60 W
For which of the following ‘ampere second’ could be the unit ?
A. Reluctance
B. Charge
C. Power
D. Energy
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
When electric current passes through a bucket full of water, lot of bubbling is observeD. This suggests that the type of supply is____________?
A. A. C.
B. D. C.
C. any of above two
D. none of the above
Which of the following statement is true both for a series and a parallel D. C. circuit?
A. Elements have individual currents
B. Currents are additive
C. Voltages are additive
D. Power are additive
Which of the following quantities remain the same in all parts of a series circuit ____________?
A. Voltage
B. Current
C. Power
D. Resistance
The unit of resistivity is
A. Ω.
B. Ω – metre.
C. Ω / metre.
D. Ω / m².