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For the following questions answer them individually
Which of the following statements about the zinc-carbon cell is true?
The zinc container has a potential of 1.5 V against the carbon electrode.
The air in the air space in needed for the oxidation of zinc.
When current is drawn from the cell, the carbon rod is partly consumed.
The depolarizer mainly contains brown iron ore and carbon powder.
The capacitor, commonly used for ceiling fan motors has a value of $$ 2.3 \mu F$$.The type of capacitor used is generally __________.
Parallel plate with mica dielectric
None of these
Coulomb's law for the force between electric charges closely resembles with__________.
Newton's law of motion
Law of conservation of energy
'Newton's law of gravitation'
The potential inside a charged hollow sphere is __________.
Same as that on the surface
less than that on the surface
A capacitor of $$ 40 \mu F$$ is charged to a potential difference of 500 volts. The charge acquired by the capacitor, in Coulomb's, is __________.
Which of the following capacitors will have least energy stored in it?
A 500 pF capacitor charged to 10kV
A 1 $$\mu F$$ capacitor, charged to 5kV
A 40 $$\mu F$$ capacitor charged to 400 V
All will have same energy stored
The lines of force due to charged particles are__________.
A capacitor can be represented by a capacitance and a resistance in parallel. For a good capacitor, this parallel resistance is__________.
An electric charge moves with a constant velocity(v) parallel to the lines of force of a uniform magnetic field B.The force experienced by the charge is_________.
In which of the following appliances is the heating effect used?
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