On increasing the resistance in a circuit, the current in it :
(a) decreases (b) increases
(c) remains unchanged (d) nothing can be said.
I=VR
so if resistance increases , current decreases
(a) decreases
On reversing the direction of current in a wire, the magnetic field produced by it: (a) gets reversed in direction (b) increases in strength (c) decreases in strength (d) remains unchanged in strength and direction.
On increasing resistance in a circuit, current in it :
In the presence of a catalyst, the heat evolved or absorbed during the reaction ..... .
(a) increases (b) decreases (c) reamins unchanged (d) may increase or decrease