A. Temperature gradient
B. Mass
C. Work
D. Time
Correct Answer:
Option A – Temperature gradient
Explanation
Temperature gradient(Tg) = DT ÷ L = T2 – T1 ÷ L
i.e– it is the ratio of an increment in temperature to the length
Hence, Temperature gradient (Tg) has defined direction alongside with magnitude
And it is a vector quantity
Mass, work & Time are scalar quantity
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![It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]")