GEOLOGY

Detailed explanation-1: -As the current only flows in one direction, from positive to negative, it is a characteristic of DC current. As a result, the battery is a DC current source. Hence, option A is the correct answer.

Detailed explanation-2: -The current obtained from a battery is direct current and it flows from the positive terminal to the negative terminal of the battery through an appliance. Its magnitude and direction remains constant with time.

Detailed explanation-3: -DC stands for ‘direct current’ which means the current only flows in one direction. Batteries and electronic devices like TVs, computers and DVD players use DC electricity-once an AC current enters a device, it’s converted to DC. A typical battery supplies around 1.5 volts of DC.

Detailed explanation-4: -Direct current is defined by the constant flow of electrons (see figure 1) from an area of high electron density to an area of low electron density. In circuits involving batteries, this is illustrated by the constant flow of charge from the negative terminal of the battery to the positive terminal of the battery.

Detailed explanation-5: -Since AC is much better than DC for long-distance transmission, the power grid uses AC. Likewise, most of your home appliances use AC. However, solar panels produce DC power, and that’s also how most batteries store it.