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A wire of a given material has length "I' and resistance "R". Another wire of the same material having three times the length and twice the area of cross section will have a resistance equal to:

A3R

B1/2 R

C2/3 R

D3/2 R

Answer:

D. 3/2 R

Read Explanation:

  • The resistance of the new wire is 3/2 R or 1.5 times the original resistance


Related Questions:

പ്രതിദീപ്‌തിയുടെ മൂന്നാം ഘട്ടത്തിൽ തന്മാത്ര ഗ്രൗണ്ട് സ്റ്റേറ്റിലേക്ക് മടങ്ങുന്നത് എങ്ങനെയാണ്?

Identify the correct statement(s) from among the following?

  1. a) Resistivity of a material is dependent on the nature of the material.
  2. (b) Resistivity of a material is independent of the area of cross section.
  3. (c) Resistivity of a pure metal is more than its alloy.
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