Explanation

• The next closest star system to Earth after the Sun is known as Alpha Centauri.
• Specifically, Proxima Centauri, which is part of the Alpha Centauri star system, is the closest individual star to Earth, located approximately 4.24 light-years away.

Explanation

• Nuclear fusion is the process by which atomic nuclei combine to form a heavier nucleus, releasing vast amounts of energy in the process.
• In the case of stars, nuclear fusion occurs when hydrogen atoms fuse together to form helium, releasing energy in the form of light and heat.

Explanation

Stars are massive, luminous balls of gas that are primarily composed of:

• Hydrogen (about 70%)
• Helium (about 28%)

Explanation

• Resistance (C) is the opposition to the flow of electric current.
• It is measured in ohms (Ω).

Explanation

In most businesses and homes, electrical circuits are connected in parallel to ensure that:

• Each device receives the same voltage
• If one device fails or is turned off, others remain operational
• The entire circuit doesn't fail if one device is disconnected

Explanation

An ammeter is a device specifically designed to measure electric current (in amperes).

Explanation

• A voltmeter is always connected in parallel across the device or component for which the voltage is to be measured.
• This is because a voltmeter needs to measure the potential difference between two points, and parallel connection allows it to do so without interrupting the circuit.

Explanation

• In a parallel circuit, each branch has its own path for current to flow.
• If one branch is interrupted, the other branches will continue to operate normally.

Explanation

• When two bulbs are connected in a series circuit and one bulb blows, the entire circuit is interrupted, and the other bulb will also stop glowing, i.e., also blow (blast).
• This is because there is no longer a complete path for current to flow through the circuit.

Explanation

• A series circuit is a circuit that provides only one path for the current to flow.
• If one component is removed or fails, the entire circuit is interrupted.