A series LR circuit contains an emf source of 18 V having no internal resistance, a resistor, a 28 H inductor having no appreciable resistance, and a switch. If the emf across the inductor is 80% of its maximum value 2 s after the switch is closed, what is the resistance of the resistor

we need to know the time interval during which the force acts. impulse of force = momentum change

truck y has a greater velocity than truck x.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.