Two uniform wires A and B are of the same metal and have equal masses. The radius of wire A is twice that of wire B. The total resistance of A and B when connected in parallel is
Text Solution
Verified by ExpertsThe correct answer is:
A
Density and masses of wire are same so their volumes are same i.e. 
Ratio of resistances of wires A and 
Resistance RA and RB are connected in parallel so equivalent resistance 
By checking correctness of equivalent resistance from options, only option is correct.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
In an electrical cable there is a single wire of radius 9 mm of copper. Its resistance is 5 Ω Ω . T…
Twelve wires of equal length and same cross-section are connected in the form of a cube. If the res…
The resistance of a wire is per meter. It is bend in the form of a circle of diameter 2m. A wire o…
When the key K is pressed at time t = 0, which of the following statements about the current I in t…
A torch bulb rated as 4.5 W, 1.5 V is connected as shown in the figure. The e.m.f. of the cell need…
In the circuit shown in the figure, the current through