SELECT * FROM question_mgmt as q WHERE id=3797 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=263 and ex_no='3' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Electricity use the data in table 12 2 to answer the following

Question:

Use the data in Table 12.2 to answer the following –

(a) Which among iron and mercury is a better conductor?
(b) Which material is the best conductor?

Answer:

(a) The Resistivity of mercury is more than that of iron. So mercury offer more resistance than that iron whereas iron have lower resistivity and offer less resistance therefore iron is a better conductor than mercury

Resistivity of iron = 10.0 x 10-8 

Resistivity of mercury = 94.0 × 10−8 

 

(b) Silver is the best conductor of electricity because of lowest resistivity and offers lower resistance as shown according to the above table.


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