The melting of an ice cube is considered a physical change.
Answer:
Option B, to establish the reference polarity for induced voltages
Explanation:
Dot basically indicates the polarity of the electrical windings. Currents entering and leaving the same dotted ends will produce magnetic flux in same direction while the current entering at one dotted end and leaving at another dotted end will produce opposing magnetic flux.
Thus it is clear that dot represents the terminals having same phases of induced AC voltages so that only one winding is loaded at a time.
Hence, option B is correct
Answer:
Each carbon atom is covalently bonded to four other carbon atoms in diamond. A lot of energy is needed to separate the atoms. This is because covalent bonds are strong. This is the reason why diamond has a high melting point.
Explanation:
hey man here is your answer hope it helps
Because electrons add to the atomic mass, while it is very slim (around 1/2000 of a proton) their mass is what causes the decimals on atomic masses
Answer:
It converts light into electric current.
Explanation:
The first line of the description says that the photometer is a device that converts light to voltage. if the voltage can be measured then current flowing through it can be calculated by Ohms law V=IR.
<em>Hence the photometer converts light to electric current.</em>
The photometer is used to measure the strength of electromagnetic radiation falling on it and operate within the range of ultraviolet ,visible and infrared spectrum.
It converts light to electric current using photodiode (pn junction),photoresistor and photmultiplier.
