# When a certain rubber band is stretched a distance of x, it exerts a restoring force of magnitude

1. F = ax + bx2
2. Where a and b are constants. The work done in stretching this rubber band from x = 0 to x = L is
1. aL2 + bLx3
2. aL + 2bL2
3. a + 2bL
4. bL
5. aL2/2 + bL3/3

1. 13.6 eV
2. 27.4 eV
3. 54.4 eV
4. 108.8 eV
5. 122.4 eV

# When a hydrogen atom is raised from the ground state to an excited state:

1. Both K.E and P.E increase
2. Both K.E and P.E decrease
3. P.E increases, K.E decreases
4. K.E increases, P.E decreases

# In all-natural processes the entropy of the universe:

1. remains constant
2. always decreases
3. always increases
4. may increase or decrease

1. Proton
2. Electron
3. Deuteron
4. α-particle

# The particle that travels with a speed greater than that of light is:

1. Lepton
2. Pion
3. Meson
4. None of these

1. τ = λ
2. τ = 1/λ
3. τ = λ/ln(2)
4. τ = ln(2)/λ

1. c
2. 2c
3. c/2
4. 0.9c

# Which of the following properties of an electron is made use of in the electron microscope?

1. High velocity
2. Wave nature
3. Interference
4. Diffraction

1. 0, 1, 2, 3
2. 0, 1, 2
3. 1, 2, 3
4. -1, 0, +1