The diagram below shows the wire of a sonometer box set into resonance by a vibrating tuning fork of frequency f, when the wire is stretched by a tension T, the resonating length of the wire is I while the wavelength of the sound produced is λ. Which of the following statements is not correct? The wave produced on the wire is

• A. stationary and longitudinal
• B. stationary and mechanical
• C. mechanical and longitudinal
• D. progessive and transverse

A force of 6N acts horizontally on a stationary mass of 2kg for 4s. The kinetic energy gained by the mass is _________

• A. 366J
• B. 240J
• C. 144J
• D. 90J

(a) The equation y = \(\alpha\) sin (wt - kx) represents a plane wave travelling in a medium along the x-direction, being the displacement at the point x at time t.

(i) Given that x is in metres and t is in seconds, state the units of k and w

(ii) What physical quantity does \(\frac{W}{k}\) represent? Justify your answer

(iii) State whether the wave is travelling in the positive or negative x-direction.

(b)(i) What are beats?

(ii) A sonometer wire has a frequency of 259 Hz. It is sounded alongside a tuning fork of frequency 256 Hz. Calculate the beat frequency

(iii) The sonometer wire in (b)(ii) above is under a tension of 1200 N. If a metre of the wire has a mass of 0.03 kg, calculate the length l of the wire when it is vibrating in the fundamental mode.

(c) List two similarities between the human eye and the photographic camera.

Silicon doped with aluminum and germanium doped with arsenic become?

• A) p- and n- types respectively
• B) n- en p- type respectively
• C) p- type semiconductor
• D) n- type semiconductors

The direction of induced current in a straight wire placed in magnetic field is determined by using?

• A. Fleming's right hand rule
• B. Maxwell's screw rule
• C. Faraday's law
• D. Lenz's law

Calculate the effective capacitance of the circuit in the diagram given

• A. 4μf
• B. 3μf
• C. 2μf
• D. 1μf

The resultant capacitance in the fig below is

• A. 15.0μF
• B. 9.8μF
• C. 1.3μF
• D. 0.8μF

The motion of a body is simple harmonic if the?

• A. acceleration is always directed towards a fixed point
• B. path of motion is a straight line
• C. acceleration is proportional to the square of the distance from a fixed point
• D. acceleration is constant and directed towards a fixed point

A wave travelling from water to glass suffers a change in its speed at the common boundary. Which of the following properties explains this observation?

• A. dispersion
• B. refraction
• C. interference
• D. diffraction

An electric circuit consists of a resistor. a battery and a key. If the voltage of the battery is increased, there Would be an increase in the?

• A. current and resistance only.
• B. current resistance and temperature.
• C. current and temperature only.
• D. resistance and temperature only