51) The materials which have resistivity in the order of 1014 to 1016 Ω-m are
View Answer
A) insulators
Explanation:Materials with resistivity in the order of
to 
-m
\~ 
-m
\~ 
to 
-mInsulators: Resistivity
10^{11}
10^{16}\ \Omega![-m Final Answer: Insulators [/su_spoiler] </div> <div class="mcq-question" data-answer="C"> <div class="question-text"><b>52) The graph between potential difference (on X-axis) and current (on Y-axis) for a conductor gives a straight line</b></div> <div class="mcq-options"> A) parallel to X-axis B) parallel to Y-axis C) passing through origin D) intercepting both X-axis and Y-axis </div> [su_spoiler title="View Answer" style="fancy" icon="arrow"] C) passing through origin [/su_spoiler] </div> <div class="mcq-question" data-answer="A"> <div class="question-text"><b>53) 1 joule/1 coulomb =</b></div> <div class="mcq-options"> A) 1 volt B) 1 ohm C) 1 watt D) 1 ampere </div> [su_spoiler title="View Answer" style="fancy" icon="arrow"] A) 1 volt [/su_spoiler] </div> <div class="mcq-question" data-answer="C"> <div class="question-text"><b>54) Pick the false statement from the following</b></div> <div class="mcq-options"> A) Resistivity is also called specific resistance B) Reciprocal of resistivity is called conductivity C) Units of both resistivity and resistance are the same D) Low resistivity metals are good conductors </div> [su_spoiler title="View Answer" style="fancy" icon="arrow"] C) Units of both resistivity and resistance are the same [/su_spoiler] </div> <div class="mcq-question" data-answer="B"> <div class="question-text"><b>55) A current of 1.5 A passes through a conductor of resistance 20Ω. The potential difference across it is</b></div> <div class="mcq-options"> A) 13.33 V B) 30 V C) 5V D) 20 V </div> [su_spoiler title="View Answer" style="fancy" icon="arrow"] B) 30 V Explanation:We use Ohm's Law: V = I × R Given: I = 1.5\ \text{A}](https://www.mcqbits.com/wp-content/ql-cache/quicklatex.com-7c0d8a71063657e348eeba5f39897c5e_l3.png "Rendered by QuickLaTeX.com")
R = 20\ \OmegaV = 1.5 × 20 = \boxed{30\ \text{V}}$Final Answer: 30 V
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