Question 1

A device that converts chemical energy into electrical energy through chemical action is called_______________

Accepted Answer

electric cell

Answer

generator

Answer

alternative

Answer

electrolyte

Question 2

Which one of the given below is not a DC-Source.

Accepted Answer

Transformer

Answer

Power supply

Answer

batteries

Answer

generator

Question 3

A cell which can recharge after every discharge is called Secondary Cell.

Accepted Answer

true

Answer

false

Question 4

Which of the following cell that keeps linear characteristics of discharge process

Accepted Answer

Mercury cell

Answer

nickel cadmium batteries

Answer

Lead storage batteries

Answer

dry cell

Question 5

Write down the discharging reaction of lead storage battery

Accepted Answer

Anode:

Pb(s)+ SO₄^2–(aq) → PbSO₄(s)+ 2e^–

Cathode:

PbO₂(s) + SO₄^2–(aq) +4H⁺(aq) + 2e^–→ PbSO₄(s) + 2H₂O (ℓ)

Overall Discharge Reaction:

Pb(s)+PbO₂(s) +2H⁺+2SO₄²⁺(aq) → 2PbSO₄(s)+ 2H₂O(l)

Question 6

_____________ cell is recharged more than 100 times.

Accepted Answer

Ni -Cd cell

Answer

Lead acid cell

Answer

Dry cell

Answer

Mercury cell

Question 7

The Solar Cell working principle is_______________.

Accepted Answer

photovoltaic effect

Answer

Seebeck effect

Answer

photoconductive effect

Answer

thermoelectric effect

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