MCQ
If a spark is produced on removing the load from an $AC$ circuit then the element connected in the circuit is.
- Ahigh resistance
- Bhigh capacitance
- ✓high inductance
- Dhigh impedance
✓
Answer
Correct option: C.
high inductance
On removal of load from the circuit, the circuit suddenly becomes an open circuit.
Thus $\frac{\text{di}}{\text{dt}}\rightarrow\infty$
For sparking, high voltage must appear across the open ends. This will happen only in case of an inductor as the voltage drop across the
inductor is $\text{L}\frac{\text{di}}{\text{dt}}$
Therefore, the circuit has high inductance.
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