Electrical Engineering - Energy and Power - Discussion

Discussion Forum : Energy and Power - True or False (Q.No. 2)
2.
Power rating is related to resistance value.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
9 comments Page 1 of 1.

WAQAS said:   6 years ago
P=VI=I^2*R.

Resistance produces Heat.
Heat is a change in temperature.

Rajesh saini bandikui said:   7 years ago
Power rating they refer to a true power which is normally in the volt-Amp unit such as VA, KVA, MVA. So my answer is False.

Amaanat ali said:   8 years ago
Take a heater coil when we use its full length and when we use a fraction of it, power rating does change.

Marlon said:   8 years ago
Basically, the formula for power is P = VIpf m also P = i * i * R, so it is related. but the answer says it is not maybe power rating they refer to a true power which is normally in the volt-Amp unit such as VA, KVA, MVA.

K.Srikanth said:   8 years ago
@Kundan.

My view is "Power is related to both current and resistance in the closed circuit".

Jarjees ahamed said:   9 years ago
p = i*i*R.

R-Resistance, so it will including in power value.

Kundan said:   1 decade ago
In devices which primarily dissipate electric power or convert it into mechanical power, such as resistors, electric motors, and speakers, the power rating given is usually the maximum power that can be safely dissipated by the device. The usual reason for this limit is heat, although in certain electromechanical devices, particularly speakers, it is to prevent mechanical damage. When heat is the limiting factor, the power rating is easily calculated. First, the amount of heat that can be safely dissipated by the device.

Trupti said:   1 decade ago
Power rating is related to Temperature.

S.Logeswari said:   1 decade ago
Which one is related to power rating?

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