The time period of a seconds' pendulum clock is —

1. 1 s
2. 2 s
3. 1 min
4. 12 h

The time period of two pendulums of length 1 m and 16 m are in ratio :

1. 1 : 16
2. 1 : 4
3. 16 : 1
4. 4 : 1

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

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