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In a closed circuit,the current I(in amp...

In a closed circuit,the current I(in ampere) at an instant of time t( in seconds) is given by `I=4-0.08t`. What will be the number of electrons flowing in 50 s through the cross section of the conductor ? (charge of an electron=`1.6 times 10^-19C`)

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The correct Answer is:
`6.25 times 10^20`
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CHHAYA PUBLICATION-CURRENT ELECTRICITY -EXERCISE ( PROBLEM SET-I)
  1. The current flowing through a wire depends on time as l=9t^2+4t+1. Wha...

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  2. In a closed circuit,the current I(in ampere) at an instant of time t( ...

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  3. What is the resistance of a relay coil which draws a current of 35 mA ...

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  4. An electric kettle has a resistance of 160 Omega. What current will fl...

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  5. IF a wire of length 1 m and diameter 1.5 mm, a potential difference of...

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  6. The resistance of a uniform metallic wire is 1 Omega,its radius is 0.1...

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  7. The lengths diameters and resistances of two wire are in the ratio of ...

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  8. A wire of radius 5 mm is produced from a lump of copper. Another wire ...

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  9. A metal wire has a resistances of 5 Omega . If its length is doubled b...

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  10. A 1 m long metal wire has a cross sectional area of 0.1mm^2. Find out ...

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  11. The lengths,resistances and resistivities of materials of two wires-ea...

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  12. A nichrome wire of resisitivity 'rho' is stretched to make it 10% long...

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  13. A wire with a resistances 5 Omega is drawn out so that its new length ...

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  14. A wire of resistance 32 Omega is melted and drawn into a wire of half ...

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  15. The resistance of a copper wire at 20^@C is 3 Omega and at 100^@ is 3....

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  16. The temperature coefficient of resistance of copper is 42.5 times 10^-...

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  17. A voltage of 30 V is applied across a carbon resistor with first,secon...

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  18. The resistance of a platinum wire of platinum resistance thermometer a...

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  19. A carbon resistor is marked in coloured bands in the sequence blue,gre...

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  20. The sequence of bands market on a carbon resistor are yellow,red,orang...

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