Question

At the time of short circuit, the current in the circuit is :

• A. Reduces
• B. Remains constant
• C. Increases heavily
• D. Vary continuously

Hint:

A short circuit creates a path of very low resistance, leading to a sudden and very large increase in current flow. This surge in current can generate excessive heat, potentially causing damage to the circuit components, power supply, or even fires.

Answer 1

The Correct Option is C

Step 1: Understand what a short circuit is.
A short circuit occurs when there is a low-resistance connection between two conductors supplying electrical power to a circuit. This bypasses the normal load of the circuit. Step 2: Apply Ohm's Law.
Ohm's Law states that current ($I$) is directly proportional to voltage ($V$) and inversely proportional to resistance ($R$), i.e., $I = V/R$. Step 3: Analyze the effect of a short circuit on resistance.
In a short circuit, the resistance ($R$) of the path becomes very low, ideally close to zero. Step 4: Determine the effect on current.
According to Ohm's Law, if the resistance ($R$) decreases significantly (approaches zero), and the voltage ($V$) remains relatively constant (from the power source), then the current ($I$) must increase heavily. A very low resistance leads to a very high current. Step 5: Compare the conclusion with the given options.
When a short circuit occurs, the current in the circuit increases heavily. This matches option (3). $$(3) Increases heavily$$