Statement I A car battery is of 12 V. Eight dry cells of 1.5 V connected in series can give 12 V. Still such cells are not used in starting a car.

Question

Each of these question contains statements : Statement 1 (Assertion) and Statement II (Reason). Each of these questions also has four alternative choice, only one of which is correct answer. you have to select the correct choice in the codes (a), (b), (c) and (d) the given below

(a) Statement I is true, Statement II is true; Statement II is not a correct explanation of Statement i 

(b) Statement I is true, Statement II is false 

(c) Statement I is false, Statement II is true 

(d) Statement I is true, Statement II is true; Statement II is a correct explanation of Statement I

Statement I A car battery is of 12 V. Eight dry cells of 1.5 V connected in series can give 12 V. Still such cells are not used in starting a car. 

Statement II It is easier to start a car engine on a warm day than on a rainy day.

Answer 1

The correct option is (c) Statement I is false, Statement II is true.

Explanation:

To start a car, a very high current is required A car battery has very low internal resistance, so that it can provide high current. When eight dry cells are joined in series, the internal resistance of the combination becomes very high. Due to this internal resistance, small current will be drawn from it. 

Hence, such cells cannot be used to start a car. On warm day the internal resistance of car battery decreases and so large current can be drawn from the battery. But on a chilly day' reverse process occurs.