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A rifle bullet loses 1/20th of its velocity in passing through a plank. What will be the least number of such planks required to just stop the bullet? | A rifle bullet loses 1/20th of its velocity in passing through a plank. What will be the least number of such planks required to just stop the bullet is..

Conversion of Galvanometer Into Voltmeter | What is Galvanometer? | What is Voltmeter ?

Before we'll discuss on Conversion of Galvanometer Into Voltmeter we should know about these devices. What is Galvanometer? Galvanometer is a device which measures small amount of current/voltage. it shows deflection on passing the current through it. What is Voltmeter? Voltmeter is an device which measures potential difference between two points. Why we convert Galvanometer Into Voltmeter? Thus Galvanometer measures small amount of current/voltage. therefore we convert Galvanomter into Voltmeter to measure large amount of potential difference. Conversion of Galvanometer Into Voltmeter It seems people will not understand properly by this article. then i have made a detailed video on Conversion of Galvanometer Into Voltmeter Click here to watch .

A train travels between two stations a and b 135 km apart in 5 hours. if on the return journey the average speed is reduced by 2 km/hr, what is the average speed during the journey from a to b and b to a?

A train travels between two stations a and b 135 km apart in 5 hours. if on the return journey the average speed is reduced by 2 km/hr, what is the average speed during the journey from a to b and b to a? Distance between Station a to b=135km Time taken=5hrs Therefore, Speed between a to b=135/5= 27Km/hrs

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