Practice portal › Current Electricity › Kirchhoff's Laws and Circuit Analysis

The sliding contact C is at one fourth of the length of the potentiometer wire (AB) from A as shown in the circuit diagram. If the resistance of the wire AB is R₀, then the potential drop (V) across the resistor R is

Asked in Re-NEET 2022 · Kirchhoff's laws in networks

• (1) (2V₀R)/(2R₀+3R)
• (2) (4V₀R)/(3R₀+16R)
• (3) (4V₀R)/(3R₀+R)
• (4) (2V₀R)/(4R₀+R)

Step-by-step solution

Why the other options are wrong

• (1) No single slip gives this; the part AC is (R₀)/4, in parallel with R, and CB is (3R₀)/4 in series.
• (3) No single slip gives this; the denominator must contain 16R, from (R₀)/4∥ R in series with (3R₀)/4.
• (4) No single slip gives this; the part AC is (R₀)/4, in parallel with R, and CB is (3R₀)/4 in series.

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.