Answer available
Class 9 · Physics · Light
Distinguish between a real and a virtual image, with one example of each.
3 marksMediumShort answer
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77 questions
- Answer available
Class 9 · Physics · Sound
What is an echo, and state two of its practical uses.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Sound
Distinguish between infrasonic, audible and ultrasonic sound and give one use of ultrasound.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Fluids
Why is it easier to swim in sea water than in river water?
3 marksMediumApplication based
- Answer available
Class 9 · Physics · Electricity and Magnetism
What is a magnetic field, and how is its direction defined?
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Laws of Motion
Distinguish between mass and weight.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Sound
Define amplitude, frequency, wavelength and time period of a wave.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Measurements and Experimentation
State the factors on which the time period of a simple pendulum depends and those on which it does not.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Laws of Motion
The mass of a body is 12 kg. Find its weight on the earth and on the moon, where g is one-sixth of its value on the earth. Take g = 10 m s−2 on the earth.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Electricity and Magnetism
Describe how a piece of iron can be magnetised by the single touch method.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Motion in One Dimension
A train starting from rest attains a speed of 72 km h−1 in 1 minute. Find its acceleration and the distance covered.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Laws of Motion
What is meant by free fall, and why does a feather fall more slowly than a stone in air but at the same rate in a vacuum?
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Motion in One Dimension
Distinguish between distance and displacement.
2 marksEasyShort answer
- Answer available
Class 9 · Physics · Laws of Motion
A body of mass 4 kg moves with a velocity of 6 m s−1. Find its momentum.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Light
State one use each of a concave mirror and a convex mirror, with the reason.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Heat and Energy
Convert 37 °C into kelvin and 300 K into degrees Celsius.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Heat and Energy
What is the anomalous expansion of water and state one of its consequences.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Heat and Energy
Name three renewable and two non-renewable sources of energy.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Laws of Motion
Why does a passenger in a bus lurch forward when the bus stops suddenly?
3 marksMediumApplication based
- Answer available
Class 9 · Physics · Measurements and Experimentation
Why is the simple pendulum used to measure time, and what is meant by an oscillation?
3 marksMediumShort answer