An electroscope is a device which is used to find if an object is
(a) charged (c) free of cracks
(b) magnetic (d) hot
Yor are provided with a magnetic compass, an empty match box,
a battery of two cells and connecting wires. Using these objects
how will you make a tester for testing an electric circuit? Draw
the necessary circuit diagram and explain.
An electric current is passed through a conducting solution. List any three possible observations.
Why is tin electroplated on iron to make cans used for storing food?
Paheli wants to deposit silver on an iron spoon. She took silver
nitrate (AgNO3) solution in a beaker and setup a simple circuit
for electroplating. Which terminal of the battery should the spoon
be connected to? What material should the other electrode be
made of?
Name the effect of current responsible for the glow of the bulb in
an electric circuit.
Will the solution of sugar in distilled water conduct electricity?
Fill in the blanks
(a) The object to be electroplated is taken as ____________
electrode.
(b) One of the most common applications of chemical effect of
electric current is ______________.
(c) Small amount of a mineral salt present naturally in water
makes it a______________ of electricity.
(d) Electroplating of ______________ is done on objects like water
taps and cycle bell to give them a shiny appearance.
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