The four bulbs of 40 W each are connected in series swift a battery across them which of the following statement is true ?
None of the above
The current through each bulb in same
The voltage across each bulb is not same
The power dissipation in each bulb is not same
The current through each bulb in same
Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across
Rl
Ri
either Rl or Ri
none of them
Rl
What will be energy used by the battery if the battery has to drive 6.28 x 1018 electrons with potential difference of 20 V across the terminal ?
15 joules
10 joules
5 joules
20 joules
20 joules
The S.I. unit of power is
Henry
coulomb
watt
watt-hour
watt
Electric pressure is also called
voltage
energy
power
resistance
voltage
The rating of a fuse wire is always expressed in
amperes
ampere-volts
ampere-hours
kWh
amperes
The minimum charge on an ion is
None
equal to the charge of an electron
equal to the atomic number of the atom
equal to the charge of the number of electrons in an atom (#) zero
equal to the charge of an electron
In a series circuit with unequal resistances
the highest resistance has the highest voltage drop
the highest resistance has the most of the current through it
the lowest resistance has the highest voltage drop
the lowest resistance has the highest current
the highest resistance has the highest voltage drop
The filament of an electric bulb is made of
nickel
aluminium
carbon
tungsten
tungsten
A 3 Q resistor having 2 A current will dissipate the power of
2 watts
4 watts
6 watts
8 watts
6 watts
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