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In meter-bridge the balancing length from left is found to be 20 cm when standard resistance of 1 Ω is in right gap. The value of unknown resistance is
(a) 0.25Ω (b) 0.4 Ω
(c) 0.5 Ω (d) 4 Ω

A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/Quantities constant along the length of the conductor is/are
(a) Current, electric field and drift speed
(b) Drift speed only
(c) Current and drift speed
(d) Current only

A bus traveling the first one-third distance at a speed of 10 km/h, the next one third at 20 km/h and the last one-third at 60 km/h. the average speed of the bus is ? For more questions visit http://www.keshawclasses.com/

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