How long does the light from sun take to reach us?

966

---

How is radiocarbon produced in the atmosphere?

1102

---

Explain refraction?

1000

---

You want to magnetize a metal. How would you do that?

1026

---

What is the value of magnetism at the center of earth?

1032

---

Explain diffraction?

1040

---

What are rectifiers used for?

1044

---

Explain big bang theory?

1046

---

Explain radio telescopes?

1117

---

What do you mean by newton meter?

959

---

What is the weight of automotive oil?

976

---

What is the difficulty in making fusion based nuclear reactors?

1027

---

State 'law of machines'?

1065

---

In which medium does the sound travel fatest?

1071

---

Explain optical telescopes?

1007

---