What is the allowable maximum current in amps from a .5 KVA transformer operating at 12 volts without being overloaded?

What is the allowable maximum current in amps from a .5 KVA transformer operating at 12 volts without being overloaded?

• A. 20.8
• B. 31.2
• C. 41.6
• D. 50.0

Answer: (C)

To find the allowable maximum current from a 0.5 KVA transformer operating at 12 volts, one must first convert the transformer rating from KVA to watts. Since 1 KVA is equivalent to 1,000 watts, a 0.5 KVA transformer corresponds to 500 watts. Next, we can use the formula for calculating current: Current (I) = Power (P) / Voltage (V) In this case, the power output is 500 watts (or 0.5 KVA), and the operating voltage is 12 volts. Plugging these values into the formula gives: I = 500 watts / 12 volts = 41.67 amps When rounded, this value indicates that the maximum allowable current from the transformer without being overloaded is approximately 41.6 amps. Therefore, the correct answer is based on this calculation, providing a clear understanding of the relationship between voltage, current, and power for transformers.

To find the allowable maximum current from a 0.5 KVA transformer operating at 12 volts, one must first convert the transformer rating from KVA to watts. Since 1 KVA is equivalent to 1,000 watts, a 0.5 KVA transformer corresponds to 500 watts.

Next, we can use the formula for calculating current:

Current (I) = Power (P) / Voltage (V)

In this case, the power output is 500 watts (or 0.5 KVA), and the operating voltage is 12 volts. Plugging these values into the formula gives:

I = 500 watts / 12 volts = 41.67 amps

When rounded, this value indicates that the maximum allowable current from the transformer without being overloaded is approximately 41.6 amps. Therefore, the correct answer is based on this calculation, providing a clear understanding of the relationship between voltage, current, and power for transformers.