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# GATE Mechanical 2001 Question

resistance spot welding is performed on two plates of $1.5$ $mm$ thickness with $6$ $mm$ diameter electrode, using $15000$ $A$ current for a time duration of $0.25sec$. assuming the interface resistance to be $0.0001\Omega ,$ the heat generated to form the weld is
A
$5625$ $W$-$sec$
B
$8437$ $W$-$sec$
C
$22500$ $W$-$sec$
D
$33750$ $W$-$sec$

# GATE Mechanical 2003 Question

$P - 2,\,\,Q - 5,\,\,R - 1,\,\,S - 3$
$P - 6,\,\,Q - 3,\,\,R - 4,\,\,S - 4$
$P - 4,\,\,Q - 1,\,\,R - 6,\,\,S - 2$
$P - 5,\,\,Q - 4,\,\,R - 2,\,\,S - 6$