In multiple sclerosis, the myelin sheaths around the axons of the brain and spinal cord are damaged and demyelination results. How does this disease manifest at the level of the action potential?

 I) Action potentials move in the opposite direction on the axon.

 II) Action potentials move more slowly along the axon.

 III) No action potentials are transmitted.

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#Question id: 7540

#General Aptitude

Two trains of lengths 200m and 320m pass each other with constant speeds on parallel tracks in opposite directions. The drivers and guards are at extremities of the trains. The time gap between the drives passing each other and first driver-guard pair passing each other is 25 s. How much later will other driver-guard pair pass by?

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#Question id: 7541

#General Aptitude

A train travelling at 54km/hr completely crosses another train having half its length and travelling in opposite direction in 18km/hr in 30 second. It also passes a railway platform in 40 seconds. The length of the platform (in meters) is

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#Question id: 7542

#General Aptitude

Two trains travel in opposite directions at 55km/hr and 53km/hr and a man sitting in slower train passes the faster train in 5.5 second. The length of the faster train (in meters) is

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#Question id: 7543

#General Aptitude

Two train whose lengths 180m and 220m respectively are running in opposite direction with respective speeds of 40km/hr and 50km/hr. Time taken by them to cross one another will be (in seconds)

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#Question id: 7544

#General Aptitude

In what time (in second) will a train 140 meters long cross an electric pole, is its speed in 126km/hr?

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#Question id: 7545

#General Aptitude

How long a train 150 meters long running at the speed of 108km/hr take to cross a bridge 186 meters in length?