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qUESTIONS

Four resistances 10Ω , 5Ω , 7Ω and 3Ω are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of 10Ω is connected across the diagonal AC. The equivalent resistance between A and B is

A copper wire of resistance R is cut into ten parts of equal length. Two pieces each are joined in series and then five such combinations are joined in parallel. The new combination will have a resistance

Three resistances each of 1 ohm, are joined in parallel. Three such combinations are put in series, then the resultant resistance will be

The equivalent resistance of the arrangement of resistances shown in adjoining figure between the points A and B is

A metallic wire of resistance of 12Ω is bent to form a square. The resistance between two diagonal points would be

How many minimum number of 2Ω resistance can be connected to have an effective resistance of 1.5Ω

There are n similar conductors each of resistance R. The resultant resistance comes out to be x when connected in parallel. If they are connected in series, the resistance comes out to be

The lowest resistance which can be obtained by connecting10 resistors each of 1/10 ohm is

The following four wires are made of the same material and are at the same temperature. Which one of them has highest electrical resistance

MCQs-PYQs-12th-jee

The magnitude of magnetic field required to accelerate protons (mass = 1.67×10−27kg) in a cyclotron that is operated at an oscillator frequency 12 MHz is approximately.

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