Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open
A. There will be heavy current in the main line
B. Rest of the two bulbs will not light
C. All three bulbs will light
D. The other two bulbs will light
Answer: Option D
This Question Belongs to Electrical Engineering >> Current Electricity
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Resistance of a material always decreases if
A. Temperature of material is decreased
B. Temperature of material is increased
C. Number of free electrons available becomes more
D. None of the above is correct
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
D. Zero
Current velocity through a copper conductor is
A. the same as propagation velocity of electric energy
B. independent of current strength
C. of the order of a few micro m/s
D. nearly 3 x 108 m/s
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