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Introduction of alternating current and direct current
MCQ based question
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VI
VII
VIII
IX
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If current is varying periodically from zero to a maximum , back to zero and then repeats the signal is called
1 point
DIRECT
alternating
both
none of the above
In the three pictures in the IMAGE, top of the picture REPRESENTS?
1 point
DC
AC
BOTH
NONE OF THE ABOVE
WHAT DOES THE IMAGE REPRESENTS?
1 point
DC
AC
BOTH
NONE OF THE ABOVE
SI unit for measurement of electric charge is :
1 point
volt
ohm
farad
coulomb
The frequency of ac current in India is
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50 Hz
60 Hz
70 Hz
80 Hz
What are the types of electricity?
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static
dynamic
both
none of the above
printers and photocopiers use which which type of electricity for its working ?
1 point
static
dynamic
both
none of the above
most of the electric appliances used in our homes are examples of which of the types of electricity?
1 point
static
dynamic
both
none of the above
Which one does this symbol represents?
1 point
AC SOURCE
DC SOURCE
BOTH
NONE OF THE ABOVE
Clear selection
Which one does this picture represents?
1 point
BATTERY
BULB
SWITCH
SIGNAL
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In case of cells and batteries, how energy conversion takes place ?
1 point
electrical to chemical energy
chemical to electrical energy
electrical to electrical energy
none of the above
Clear selection
which one of the following can be recharged again?
1 point
primary cells
secondary cells
both
none of the above
Clear selection
In case of Dry cell, which one of the following takes participation?
1 point
anode
cathode
both
none of the above
Clear selection
In case of thermal power generating station, how energy is converted?
1 point
heat to elecrical energy
electrical to heat energy
both
none of the above
Clear selection
In case of hydroelectric power generating station, how energy is converted?
1 point
mechanical to electrical energy
electrical energy to mechanical energy
both
none of the above
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