Questions in Current Electricity

Select	Question
	Current of 4.8 amperes is flowing through a conductor. The number of electrons per second will be
	When the current i is flowing through a conductor, the drift velocity is $v$. If $2i$ current is flowed through the same metal but having double the area of cross-section, then the drift velocity will be
	When current flows through a conductor, then the order of drift velocity of electrons will be
	Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper having 1 mm diameter, then the drift velocity (approx.) will be (Density of copper $= 9 \times {10^3}\,kg\,{m^{ - 3}}$ and atomic weight = 63)
	Which one is not the correct statement
	If a 0.1 % increase in length due to stretching, the percentage increase in its resistance will be
	The specific resistance of manganin is $50 \times {10^{ - 8}}\,ohm \times m$. The resistance of a cube of length $50\,cm$ will be
	The resistivity of iron is $1 \times {10^{ - 7}}\,ohm - m$. The resistance of a iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in $ohm - m$ will be
	The temperature coefficient of resistance for a wire is $0.00125/^\circ C$. At 300K its resistance is 1 ohm. The temperature at which the resistance becomes 2 ohm is
	When the length and area of cross-section both are doubled, then its resistance

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