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
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'Odometer' സഞ്ചരിച്ച ദൂരവുമായി ബന്ധപ്പെട്ടിരിക്കുന്നതുപോലെ 'Compass' എന്നുപറയുന്നത് താഴെ പറയുന്ന ഏതുമായാണ് ബന്ധപ്പെട്ടിരിക്കുന്നത് ?