Physics
Grade-9
Easy
Question
The time period of the rotation of the Earth is:
- 24 Hours
- 365 1/4 days
- 60 Minutes
- 30 to 31 days
Hint:
Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars
The correct answer is: 24 Hours
Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars
Related Questions to study
Physics
Hertz is a unit of:
- Time period
- Displacement
- Amplitude
- Frequency
Hertz is a unit of:
PhysicsGrade-9
- Time period
- Displacement
- Amplitude
- Frequency
Physics
The smallest interval of time after which a motion is repeated is called its ___________.
- Time period
- Displacement
- Amplitude
- Frequency
The smallest interval of time after which a motion is repeated is called its ___________.
PhysicsGrade-9
- Time period
- Displacement
- Amplitude
- Frequency
Physics
The time period of a minute hand of a clock is:
- 24 Hours
- 12 Hour
- 60 Seconds
- 60 minutes
The time period of a minute hand of a clock is:
PhysicsGrade-9
- 24 Hours
- 12 Hour
- 60 Seconds
- 60 minutes
Physics
The time period of the revolution of the Earth is:
- 24 Hours
- 365 1/4 days
- 60 Minutes
- 30 to 31 days
The time period of the revolution of the Earth is:
PhysicsGrade-9
- 24 Hours
- 365 1/4 days
- 60 Minutes
- 30 to 31 days
Physics
Radian is a unit of:
- Time period
- Angular displacement
- Amplitude
- Frequency
Radian is a unit of:
PhysicsGrade-9
- Time period
- Angular displacement
- Amplitude
- Frequency
Physics
A system of block and mass exhibiting oscillation must possess:
- Inertia only
- Elasticity only
- Elasticity as well as inertia
- Elasticity, inertia, and an external force
A system of block and mass exhibiting oscillation must possess:
PhysicsGrade-9
- Inertia only
- Elasticity only
- Elasticity as well as inertia
- Elasticity, inertia, and an external force
Physics
The number of vibrations or oscillations per second is called:
- Frequency
- Time period
- Amplitude
- None
The number of vibrations or oscillations per second is called:
PhysicsGrade-9
- Frequency
- Time period
- Amplitude
- None
Physics
The motion which is not oscillatory is:
- Vertical oscillations of a spring
- Motion of a planet around the Sun
- Motion of the simple pendulum
- oscillation of a ball in a hemisphere
The motion which is not oscillatory is:
PhysicsGrade-9
- Vertical oscillations of a spring
- Motion of a planet around the Sun
- Motion of the simple pendulum
- oscillation of a ball in a hemisphere
Physics
A periodic to-and-fro motion is called:
- Periodic motion
- oscillatory motion
- Rectilinear motion
- Orbital motion
A periodic to-and-fro motion is called:
PhysicsGrade-9
- Periodic motion
- oscillatory motion
- Rectilinear motion
- Orbital motion
Physics
A particle is moving in a circle with a uniform speed. Its motion is:
- Periodic but not oscillatory
- Periodic and oscillatory
- A periodic
- None of the above
A particle is moving in a circle with a uniform speed. Its motion is:
PhysicsGrade-9
- Periodic but not oscillatory
- Periodic and oscillatory
- A periodic
- None of the above
Physics
The oscillations of a simple pendulum of a wall clock are:
- Periodic
- Non-periodic
- Random
- Rectilinear
The oscillations of a simple pendulum of a wall clock are:
PhysicsGrade-9
- Periodic
- Non-periodic
- Random
- Rectilinear
Physics
Which letter
among the following represents the extreme positions of the pendulum.
- A, O
- B, O
- A, B
- All the above
Which letter
among the following represents the extreme positions of the pendulum.
PhysicsGrade-9
- A, O
- B, O
- A, B
- All the above
Physics
Which of the following is incorrectly matched?
- The motion of the Earth around the Sun– periodic motion.
- Strings of a guitar – vibrational motion.
- Blades of a food processor – vibratory motion.
- An athlete running on a straight track– rectilinear motion.
Which of the following is incorrectly matched?
PhysicsGrade-9
- The motion of the Earth around the Sun– periodic motion.
- Strings of a guitar – vibrational motion.
- Blades of a food processor – vibratory motion.
- An athlete running on a straight track– rectilinear motion.
Physics
A body is in uniform motion. On which type of path should it travel so that its motion can be called periodic motion?
- Straight path
- Circular path
- Curved path
- All of these
A body is in uniform motion. On which type of path should it travel so that its motion can be called periodic motion?
PhysicsGrade-9
- Straight path
- Circular path
- Curved path
- All of these
Physics
Match the following.
| a. Vibratory motion |
1. It is a kind of repetitive motion that repeats itself after a fixed interval (or regular intervals) of time. |
| b. Periodic motion |
2. It is a kind of motion in which a body covers equal distances in equal intervals of time along the same straight line. |
| c. Uniform motion |
3. It is a kind of oscillatory motion in which the moving object undergoes a change in shape or size. |
- a - 3, b - 1, c - 2
- a - 1, b - 3, c - 2
- a - 3, b - 2, c - 1
- a - 2, b - 1, c - 3
Match the following.
| a. Vibratory motion |
1. It is a kind of repetitive motion that repeats itself after a fixed interval (or regular intervals) of time. |
| b. Periodic motion |
2. It is a kind of motion in which a body covers equal distances in equal intervals of time along the same straight line. |
| c. Uniform motion |
3. It is a kind of oscillatory motion in which the moving object undergoes a change in shape or size. |
PhysicsGrade-9
- a - 3, b - 1, c - 2
- a - 1, b - 3, c - 2
- a - 3, b - 2, c - 1
- a - 2, b - 1, c - 3
