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A transformer has primary coil with 2500 turns and secondary coil with 1500 turns is connected to a 240V power supply. Find the voltage of the secondary coil.
A transformer step down a 240 a.c. voltage to 12V. The number of windings of the secondary coil is 200. Determine the number of windings of the primary coil.
The figure shows a multi-output transformer. Which pair of terminals will give an output voltage of 144V?
Number of windings of primary coil | Number of windings of secondary coil | |
A | 2,000 | 12,000 |
B | 15,000 | 60,000 |
C | 5,000 | 15,000 |
D | 10,000 | 2,000 |
Table below shows the number of windings of the primary and secondary coil of transformers A, B, C and D. Which transformer will give the highest output voltage when connected to the same input voltage?
An ideal transformer is supplied with a voltage 240V. It is found that the potential difference of the secondary coil is 12V and the current is 3A. Find the current in the primary coil.
An alternating current of 2A is supplied to a transformer. Given that the efficiency of the transformer is 75%. If the potential difference and current of the output is 1200V and 0.3A respectively. Find the potential difference across the primary coil.
The primary coil of a transformer is connected to a 240V a.c. supply and an output voltage of 6V is detected in the secondary coil. Find the ratio of the number of windings in the secondary coil to the number of windings in the primary coil.