High School

A 12 V battery connected to a 6-ohm resistor drives a constant current. If the switch is turned on in 1 ms, the induced EMF will be:

a) 1.2 V
b) 2.4 V
c) 4.8 V
d) 6.0 V

Answer :

Final answer:

The correct answer is option c. The induced EMF in a circuit can be calculated using the formula EMF = V - IR, where V is the battery voltage, I is the current, and R is the resistor value.

Explanation:

The induced EMF in this scenario can be calculated using the formula: EMF = V - IR, where V is the battery voltage, I is the current, and R is the resistor value.

  1. Given that the battery voltage is 12 V, the resistor is 6 ohms, and the current is 2 A, we can plug in these values to get the induced EMF.
  2. The induced EMF will be 4.8 V (option c), calculated as 12 V - (2 A * 6 ohms).

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