IAS Physics Questions Set - II (Read 5 times)

1. The number of free electrons per 10 mm of an ordinary copper wire is 2 x 1021. The average drift speed of the electrons is 0.25 mm/s. The current flowing is:
A. 0.8 A    B. 8 A    C. 80 A    D. 5 A

2. Which of the following cells is more likely to be damaged due to short circuiting?
A. Daniel    B. Dry    C. Acid    D. Fuel

3. A gas expands from 5 litre to 105 litre at a constant pressure 100N/m2. The work done is
A. 1 Joule    B. 4 Joule    C. 8 Joule    D. 10 Joule

4. The Helium nuclei can be formed from
A. Hydrogen nuclei by process of chain reaction    B. Hydrogen nuclei through nuclear fission
C. Hydrogen nuclei through nuclear fusion    D. None of these

5. In the atom bomb dropped by Americans in 1945 on Nagasaki, Japan, the fissionable material used was
A. Helium 4    B. Plutonium 239    C. Uranium 235    D. Uranium 233

6. The engine of a truck moving a straight road delivers constant power. The distance travelled by the truck in time t is proportional to
A. t    B. t 2    C. Öt    D. t 3/2