Questions
Two batteries of e.m.f. 4 V and 8 V with internal resistances and are connected in a circuit with a resistance of as shown in figure. The current and potential difference between the points P and Q are
detailed solution
Correct option is A
Applying Kirchhoff's voltage law in the given loop,−2i+8−4−1 × i−9i=0⇒ i=13 APotential difference across PQ=13 × 9 = 3 VTalk to our academic expert!
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An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of the wires are in the ratio of (4/3) and (2/3), then the ratio of the currents passing through the wires will be
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