Physics 2011 JAMB Past Questions - Question 9: which of the following devices may be used to step up the voltage in a d.c. circuit ?

Correct Answer

D

Explanation

In a DC circuit, a device called a DC-DC boost converter or voltage booster can be used to step up the voltage. This device uses an inductor and a switch to increase the voltage level. Another device that can be used is a transformer, but it is more commonly used in AC circuits.

To step up the voltage in a DC (direct current) circuit, you can use a device called a "DC-DC boost converter" or a "DC-DC voltage booster." This electronic circuit is designed to increase the voltage level from the input to the output while maintaining the DC nature of the signal. It's commonly used in various applications, such as in power supplies or voltage amplification circuits.

In contrast, devices like transformers, which are commonly used to step up voltage in AC (alternating current) circuits, are not typically used in DC circuits because they rely on the changing magnetic field generated by alternating current to induce voltage changes in the secondary winding.