in science exhibition how lamp can blink when you clap near the lamp ? thank you

0 Answers  

---

why hv current transformers have big size ?

5 Answers   RailTel, TCS,

---

What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

---

What is the formula for calculating no-load current?

0 Answers  

---

can we use ps class in combination with protection class in differential protection and over current protection.

1 Answers  

---

what is meant by bus bar and outgoing/incoming breaker in an electrical/electronic circuit

3 Answers  

---

what is the deference between watt and KVA

3 Answers   IAF,

---

Why the arms of delta in a delta-wye power transmission system are kept constant??

0 Answers  

---

in thermal overload relay class 10A indicate what

6 Answers   Reliance,

---

what is the meaning of elecrical.

31 Answers   Infosys,

---

7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and Why DC motors, DC bulbs etc... are donot operated by AC signals?

2 Answers   Bhel,

---

what is phase angle ? and also tells me why my phase-phase voltages are 390 rather then my single phase voltages are 221 and 223 respectivly?

2 Answers  

---