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Q. 13. Draw a schematic diagram of an electric circuit consisting of a battery of four 1·5 V dry cells, a 18  resistor, a 12  resistor, a plug key, all connected in series. Calculate the value of current flowing through the 18  resistor and the power consumed by the 12  resistor. 3

Ans. Total potential difference, V = 4 X 1·5 = 6 volts
Resultant resistance, R = R1 + R2 = 18 + 12 = 30
Current, I 

I= 

Since current remains constant in a series,

Q. 14. Draw a schematic diagram of an electric circuit consisting of a battery of six 2 V cells, a 10  resistor, a 20  resistor, a plug key, all connected in series. Calculate the value of current flowing through the 10  resistor and the power consumed by the 20  resistor.

Ans.

R1 = 10  and       R2 = 20
Resultant resistance, R = R1 + R2
R = 10 + 20 = 30
Total voltage = 12 volts
Total current, I = ?
V = I R
I =

Science 2009 Question Papers Class X
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					Set 2		Set 2
					Set 3		Set 3