The time period of a simple pendulum depends on :

1. Length of pendulum
2. Amplitude of oscillation
3. Mass of bob
4. All of the above

The length of a simple pendulum is made one-fourth. Its time period becomes —

1. four times
2. one-fourth
3. double
4. half

The length of a seconds' pendulum is nearly —

1. 0.5 m
2. 9.8 m
3. 1.0 m
4. 2.0 m