Electricity Worksheet-2
(a) Electroplating (b) Electrotyping
(c) Purification of metals (d) Radio-telegraphy
(a) cathode (b) anode
(c) Anode or cathode (d) none of these
(a) by increasing the number of turns in its coil
(b) by inserting soft iron core in the coil
(c) by increasing the magnitude of current in the coil
(d) all of these
(a) compass needles
(b) magnetic stickers
(c) electric bells
(d) compass needles and magnetic stickers
(a) closed electric circuit
(b) open electric circuit
(c) incomplete electric circuit
(d) both open electric circuit and incomplete electric circuit
(a) series (b) parallel
(c) mixed circuit (d) none of these
(a) dilute HCl
(b) dilute NaOH
(c) saturated ammonium chloride solution
(d) saturated copper sulphate solution
(a) magnesium oxide (b) manganese dioxide
(c) manganese chloride (d) none of these
(a) local action
(b) polarization
(c) neutralisation
(d) both local action and polarization
(a) tiny hydrogen bubbles collect at the copper plate
(b) a large number of local cells are formed
(c) a large number of local cells are formed at the copper plate
(d) all of these
Answer Key: