1. In Edison cell, the negative plate is made of
(A) zinc.
(B) copper.
(C) iron.
(D) lead.
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2. Which electrolyte is used in Edison cell?
(A) NaOH.
(B) H2SO4.
(C) NaSO4.
(D) KOH.
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3. Which of the following cell has reversible chemical reaction?
(A) Mercury oxide.
(B) Silver oxide.
(C) Carbon zinc.
(D) Lead acid.
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4. In a lead acid battery, during discharging the oxygen is liberated at
(A) electrolyte.
(B) positive plate.
(C) negative plate.
(D) ions.
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5. In a lead acid battery, gassing occur during
(A) charging.
(B) discharging.
(C) overloading.
(D) all of the above.
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6. The energy stored in a lead acid battery is in the form of
(A) electric energy.
(B) chemical energy.
(C) electrostatic charge.
(D) potential energy.
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7. Which impurity is commonly found in electrolyte of a lead acid battery?
(A) DustIron.
(B) Lead.
(C) Sulphate.
(D) Carbonate.
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8. In Lead acid battery, the specific gravity of a fully charged cell is about
(A) 1.18.
(B) 1.28.
(C) 1.24.
(D) 2.4.
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9. The electrolyte used in silver oxide battery is
(A) sulphuric acid.
(B) nitric acid.
(C) acetic acid.
(D) alkaline.
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10. The efficiency of a primary cell is about
(A) 40%.
(B) 15%.
(C) 70%.
(D) 100%.
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11. Which of the following is responsible for the internal resistance of a lead Acid cell?
(A) Positive plate.
(B) Negative plate.
(C) Electrolyte.
(D) None of the above.
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12. Potentiometer is generally used for comparison of
(A) resistance.
(B) capacitor.
(C) emf.
(D) current.
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13. Power factor meter have
(A) current coil only.
(B) voltage coil only.
(C) both current coil and voltage coil.
(D) inductive voltage coil only.
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14. Which of the following cell is most commonly used?
(A) nickel-iron.
(B) nickel-cadmium.
(C) lead-acid.
(D) fuel cell.
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15. When a 12 V battery is connected across the primary of a transformer with a turns ratio of 4, the secondary voltage is
(A) 0 V.
(B) 3 V.
(C) 12 V.
(D) 48 V.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] A [/accordion-item][/accordion]
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