When white light is incident on a glass prism the spectrum produced on a screen placed beyond the prism is due to?

• A. Diffraction
• B. Reflection
• C. Refraction
• D. Polarisation

If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

• A. oscillation
• B. circular
• C. rotational
• D. rectilinear

Calculate the time taken to heat 2kg of water from 50°C to 100°C in an electric kettle taking 5A, from a 210V supply. (Specific heat capacity of water = 4200\(kg^{-1}K{-1}\)

• A. 2.5 minutes
• B. 5.7 minutes
• C. 6.7 minutes
• D. 7.5 minutes

(a) State three properties of waves

(b)(i) Describe, with the aid of a labelled diagram, an experiment to show how the frequency of the note emitted by a vibrating string depends on the tension in the string

(ii) State two precautions necessary to ensure accurate results.

(c) Draw a ray diagram showing how a virtual image of an object is formed by a concave mirror.

In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that

• A. a gold nucleus contains protons, neutrons and electrons uniformly distributed in a tiny volume
• B. the gold nucleus is positively charged and is concentrated in a tiny volume
• C. the gold nucleus emitted alpha particles
• D. the gold nucleus is concentrated in a tiny volume and contains alpha particles

A body is projected with an initial velocityu at angle \(\theta\) to the horizontal. If \(R_{max}\) is the maximum range of the projectile, what does the relation \(\frac{u^{2}}{R_{max}}\) represent?

• A. The vertical distance covered
• B. Acceleration due to gravity
• C. The horizontal distance covered
• D. The acceleration of the body

Bohr’s atomic model proves most successful for the explanation of the. I. structure of the hydrogen atom; II. line spectra of the hydrogen atom; III. Multi-electron atoms. Which of the statements above is/are correct?

• A. I only
• B. II only
• C. I and II only
• D. I and III only

The d.c generator has essentially the same components as the a.c generator except the presence of?

• A) slip-ring
• B) carbon brushes
• C) split ring
• D) armature

Which of the following is true of an electrical charge?

• A. Positive charge means deficit electrons
• B. Negative charge means excess of electrons
• C. electric current means movement of electrons
• D. All of the above

Which of the following statements are not true of a moving-coil milliammeter? I. It can be used to measure alternating current II. It has a linear scale III. It can be adapted to read higher values of currents IV. A resistor connected in parallel with the milliammeter would convert it to a voltmeter

• A. I and IV only
• B. II and III only
• C. III and IV only
• D. I, II and III only