Physics Class 10 - Wave Properties and Sound

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Questions and Answers

What is the relationship between wave speed (V), frequency (f), and wavelength (λ)?

V = f + λ

V = λ / f

V = f × λ (correct)

V = f / λ

Which of the following best describes a transverse wave?

Particles move parallel to wave direction

Particles move perpendicularly to wave direction (correct)

Wave consists of compressions and rarefactions

Wave requires a medium to travel

What characterizes mechanical waves compared to electromagnetic waves?

Can travel in vacuum

Are always longitudinal

Have a constant speed in all media

Require a medium for propagation (correct)

What does quality in sound refer to?

The distinctive characteristics of sound Signup and view all the answers

Which of the following is a characteristic of electromagnetic waves?

They can be polarized Signup and view all the answers

What effect does increasing the temperature of a medium have on the speed of sound in that medium?

Increases the speed of sound Signup and view all the answers

What is the critical angle in terms of total internal reflection?

The angle of incidence that results in total internal reflection Signup and view all the answers

Which component of the wave characteristics describes the maximum displacement of a particle from its rest position?

Amplitude Signup and view all the answers

What does Electromagnetism primarily describe?

The interaction between electric currents and magnetic fields. Signup and view all the answers

Which of the following best defines Magnetic flux density?

The total quantity of magnetic field lines passing through a unit area. Signup and view all the answers

Which law states that the direction of an induced current opposes the change that produced it?

Lenz's Law. Signup and view all the answers

What is the primary function of a Transformer?

To increase or decrease voltage levels in AC circuits. Signup and view all the answers

In the context of electronics, what is a Cathode-ray Oscilloscope (CRO) used for?

To visualize and analyze voltage waveforms. Signup and view all the answers

Which of these properties is NOT associated with Cathode rays?

They have mass equal to protons. Signup and view all the answers

What differentiates analogue electronics from digital electronics?

Analogue electronics operate using continuous signals, while digital electronics use discrete signals. Signup and view all the answers

Which of the following best describes Faraday's Law of Induction?

An electromotive force is induced in a circuit if the magnetic field around it changes. Signup and view all the answers

What is the primary difference between myopia and hypermetropia?

Myopia requires concave lenses for correction, while hypermetropia requires convex lenses. Signup and view all the answers

Which characteristic is true for images formed by a concave mirror?

Images can be virtual and upright if the object is within the focal length. Signup and view all the answers

What is the frequency of the 193-nm ultraviolet radiation used in laser eye surgery?

1.55 x 10^15 Hz Signup and view all the answers

What is the primary function of a magnifying glass, also known as a simple microscope?

To magnify images by bending light rays. Signup and view all the answers

What is the magnification formula for a simple microscope?

Magnification = Focal length / Distance of the object. Signup and view all the answers

How long does it take for a radio pulse radiated from the sun to reach the earth given the distance of 1.49 x 10^11 meters?

496.67 seconds Signup and view all the answers

What is the focal length of a concave mirror that forms a real image at 25.0 cm, with the object 10.0 cm away?

6.25 cm Signup and view all the answers

What is a key characteristic of a compound microscope?

It consists of multiple lenses and can significantly magnify objects. Signup and view all the answers

Which of the following statements is true regarding electric fields?

Electric field strength can be calculated by the formula E = F / q. Signup and view all the answers

What is the power of a concave lens with a focal length of 20 cm that forms an image 15 cm from the lens?

0.05 D Signup and view all the answers

What is the charge on a 40 μF capacitor with a potential difference of 6 V across it?

2.4 x 10^-4 C Signup and view all the answers

What is the unit of capacitance?

Farad Signup and view all the answers

What is the current that an electric heater uses if a charge of 2100 C is provided in 5 minutes?

7 A Signup and view all the answers

What does Ohm's law state?

Voltage is equal to the current multiplied by the resistance. Signup and view all the answers

What is the electric force of repulsion between two electrons at a distance of 1 meter?

2.3 x 10^-28 N Signup and view all the answers

How far is the object positioned from a concave lens that has a focal length of 20 cm and forms an image 15 cm from the lens?

25 cm Signup and view all the answers

What is the definition of Atomic number?

The number of protons in the nucleus of an atom Signup and view all the answers

Which of the following describes alpha (α)-decay?

Emission of a helium nucleus from an unstable atom Signup and view all the answers

What is the meaning of Binding energy in nuclear physics?

The energy required to bring nucleons together in a nucleus Signup and view all the answers

What is Chain reaction in nuclear physics?

A sequence of reactions where each event causes subsequent events Signup and view all the answers

What is the formula for calculating the period of a simple pendulum?

$T = 2\pi \sqrt{\frac{L}{g}}$ Signup and view all the answers

What is the primary difference between System software and Application software?

Application software helps users perform tasks, while system software manages hardware Signup and view all the answers

What does the term Radioactivity refer to?

The tendency of an atom to emit energy in the form of radiation Signup and view all the answers

What is the potential difference between two points A and B if it takes 9 x 10^4 J of external work to move a charge of +9 µC from A to B?

100 V Signup and view all the answers

What is the equivalent resistance when 4 Ω, 6 Ω, and 12 Ω resistances are connected in parallel?

2 Ω Signup and view all the answers

Calculate the resistance of a portable radio terminal if the potential difference is 6 V and the current flowing is 20 mA.

300 Ω Signup and view all the answers

If a 220 V circuit powers two light bulbs of 120 W and 80 W, which bulb has the greater resistance?

80 W bulb Signup and view all the answers

What is the total current flowing through a circuit with an equivalent resistance of 2 Ω connected to a 6 V emf source?

3 A Signup and view all the answers

Find the force acting on a wire carrying 4 A current with a length of 15 cm in a magnetic field of 0.8 T at an angle of 30°.

0.24 N Signup and view all the answers

What is the magnitude of torque on a square loop carrying 2 A of current in a uniform magnetic field of 0.7 T at an angle of 30°?

4.8 x 10^-4 Nm Signup and view all the answers

How many turns are on the secondary coil of a transformer that converts a 220 V supply to a 12 V supply with 2200 turns on the primary coil?

120 turns Signup and view all the answers

Study Notes

Physics Class 10 - Karachi Board - Target Paper 2023-2024

Chapter 10: General Wave Properties
- Short Section B Questions:
  - Define Amplitude, Time period, Frequency, Reflection of wave , Diffraction of wave, Refraction of wave
  - Differentiate between Transverse and longitudinal waves
  - Differentiate between mechanical and electromagnetic waves
  - What is a damped system? What is damped oscillation?
  - Define Wavelength, Wave speed, Derive V = fλ
- Long Section C Questions:
  - What is a ripple tank, and explain its working?
  - What are the necessary conditions for a body to execute simple harmonic motion?
  - What are the forces acting on a simple pendulum? Explain SHM in the pendulum with a diagram.
  - Explain SHM in a ball and bowl system with a diagram.

Chapter 11: Sound

Short Section B Questions:
- Define Quality, Loudness, Pitch, Acoustic intensity.
- Distinguish between noise and music.
- Define echo, ultrasound, audible frequency range, infrasonic.
Long Section C Questions:
- Discuss the electric bell jar experiment.
- Discuss the factors affecting the speed of sound.

Chapter 12: Electromagnetic Spectrum

Short Section B Questions:
- What is dispersion of light? What is spectrum?
- Give the characteristics of electromagnetic waves.
- Define fluorescents. Describe the sterilization and use of sunbeds. Explain the use of electromagnetic waves
  - Give some uses of electromagnetic waves.
Chapter 13: Geometric Optics
- Short Section B Questions:
  - Define Reflected ray, Refracted ray, Incident ray, Normal
  - Differentiate between reflection and refraction
  - Give laws of reflection and refraction, State Snell's law.
  - What is total internal reflection and critical angle? Show it in a figure.
  - Define power of lens, Give its formula and unit
  - Differentiate between real and virtual image
  - What do you know about Myopia and Hypermetropia? Explain how they can be corrected.
- Long Section C Questions:
  - What is a magnifying glass or simple microscope? Give its formula for magnification. Draw a ray diagram.
  - What is a compound microscope? Give its construction and working. Draw a ray diagram and give its formula for magnification.
  - What is a telescope microscope? Give its construction and working. Draw a ray diagram and give its formula for magnification.

Chapter 14: Electronic

Short Section B Questions:
- Define Electrostatics and Electric charge.
- Define Electric field. Give its formula and unit. Define Electric field lines
- Define Electrostatic potential. Give its unit.
- Define Electric potential energy or electrical energy.
- What are the factors on which electrostatic potential depends?
- What is Capacitance? Write its formula and unit.
- What are the factors on which capacitance depends?

Chapter 15: Current Electricity

Short Section B Questions:
- Differentiate between AC and DC.
- Define Potential difference, give its formula and unit.
- Define Electromotive force, Also write its formula and unit.
- State Ohm's law. Also derive V = IR.
- State and explain Joule's Law.
- Define Electric power, Power dissipation.
- What is resistance? What affects resistance?
- What is a Moving coil galvanometer?
- What is an ammeter? Explain how a galvanometer is converted into an ammeter. Define shunt resistor.
- What is a voltmeter? Explain how galvanometer is converted into a voltmeter.
Long Section C Questions:
- Derive an expression of equivalent resistance for parallel connections.
- Derive an expression of equivalent resistance for series connections.

Chapter 16: Electromagnetism

Short Section B Questions:
- Define Electromagnetism, Electromagnetic force, Electromagnetic field.
- Define Magnetic field and Magnetic field lines.
- What is Fleming's right-hand rule?
- Define Magnetic flux density. Give its unit.
- What do you know about Faraday's Law of Induction?
- Discuss the factors affecting the magnitude of an induced EMF.
- State and explain Lenz's law.
Long Section C Questions:
- What is a Transformer? Describe its construction and working
- Derive a formula for Force acting on a charge moving through a magnetic field.
- Derive an expression for Force on current-carrying conductor in a magnetic field
- Derive an expression for the Turning effect on a current carrying coil in a magnetic field.
- What is a DC motor? Describe the construction and working of a DC motor. Also draw a figure

Chapter 17: Introductory Electronics

Short Section B Questions:
- Difference between analog and digital electronics
- What are Cathode rays? List their properties.
- Uses of CRO
- Uses of logic gates.
- Basic operations of digital electronics
- Truth table of AND, OR, NOT, NAND, and NOR operations for two and three input variables
Long Section C Questions:
- What is a Cathode-Ray Oscilloscope? Give its construction and working.
- Define electron gun. Explain its construction and working
- Explain Deflection of an electron by an electric field.

Chapter 18: Information and Communication Technology

Short Section B Questions:
- Define Information technology, Telecommunication
- What do you know about Information and Communication Technology (ICT)?
- Components of Computer-Based Information System (CBIS).
- System software and Application software.
- What is a transducer? Explain its various types.
- What are Primary Memory and Secondary Memory?
- What is Data Management? Give its uses.

Chapter 19: Atomic Structure

Short Section B Questions:
- What are Rutherford's postulates?
- Define Nuclear physics
- Define Atomic number, Nucleons, and Nucleon number.

Chapter 20: Nuclear Structure

Short Section B Questions:
- Define Binding energy, radioactive element, Radioactivity, ionization, penetrating power.
- What is α-decay, give its general equation and example
- What is β-decay, give its general equation and example
- What do you know about β+ decay?
- What do you know about Half-life?
- Describe Nuclear Fission with example
- What is Chain reaction? How to illustrate
- What is Nuclear Fusion? Also explain with example.
- What are Radiation Hazards? Give hazards of particles.
- What are the Safety Measures taken for radiations?
Numerical Questions:
- Provide numerical problems for practice associated with each chapter.

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Description

This quiz focuses on Chapter 10 and Chapter 11 of the Physics curriculum for Class 10 under the Karachi Board. It covers key concepts related to wave properties, simple harmonic motion, and sound. Enhance your understanding by tackling short and long section questions that explore fundamental physics principles.