Electrical

What is the safe limit of DC voltage for humans to touch? The safe limit of DC voltage for humans

When and why is DC used instead of AC for long-distance electric power lines? Answer: DC is used instead of

Can 3,000 DC volts kill you? Answer: The answer to your question is not straightforward, as there are many factors

Why does the handrail on an escalator always go faster than the stairs? There are several possible reasons why the

Why is India’s frequency 50Hz and not 60Hz like the US? Answer: There is no definitive answer to why India’s

1. Which of the following transformers can have a tap changer? (a) Current transformer. (b) Potential transformer. (c) Power transformer. (d) Earthing transformer. ANSWER: (c) Power

IDMT relays are used to protect the power transformers against (a) external short circuits. (b) overloads. (c) internal short-circuits. (d) external short circuits and

Which of the following are the constants of the transmission lines? (A) Resistance (B) Inductance (C) Capacitance (D) All of

The Corona effect is considerably affected by which of the following? (A) Size of the conductor (B) Shape of the

The underground system cannot be operated above: (A) 440 V (B) 11 kV (C) 33 kV (D) 66 kV Answer: