The positive plates of a lead acid battery has

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)

A

$$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

B

$$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$

C

$$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

D

$$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

The active materials on the positive and negative plates of a fully charged lead-acid battery are

A

lead and lead peroxide

B

lead sulphate and lead

C

lead peroxide and lead

D

none of the above

The negative plates of a lead acid battery has

A

Lead peroxide (PbO₂)

B

Spongy lead (Pb)

C

Lead sulphate (PbSO₄)

D

Sulphuric acid (H₂SO₄)

The discharged lead acid battery has on its plates

A

Lead peroxide (PbO₂)

B

Spongy lead (Pb)

C

Lead sulphate (PbSO₄)

D

Sulphuric acid (H₂SO₄)

When a lead-acid battery is in fully charged condition, the color of its positive plate is

A

dark grey

B

brown

C

dark brown

D

none of above

During charging the specific gravity of the electrolyte of a lead-acid battery

A

increases

B

decreases

C

remains the same

D

becomes zero

While preparing electrolyte for a lead-acid battery

A

water is poured into acid

B

acid is poured into water

C

anyone of the two can be added to other chemical

D

none of the above

The best indication about the state of charge on a lead-acid battery is given by

A

output voltage

B

temperature of electrolyte

C

specific gravity of electrolyte

D

none of the above

Petroleum jelly is applied to the electrical connections to the lead-acid battery

A

prevent local heating

B

prevent short-circuiting

C

reduce path resistance

D

prevent corrosion

The common impurity in the electrolyte of lead-acid battery is

A

chlorine

B

dust particles

C

lead crystals

D

iron

The positive plates of a lead acid battery has

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