Which of the following particles are termed nucleons in a neutral atom?

• A. protons and neutrons
• B. neutrons and electrons
• C. protons and electrons
• D. protons, electrons and neutrons

From the diagram below, the correct equation for the refractive index n of the medium is

• A. n = tan i
• B. n = \(\frac{sin i}{sin 90^o}\)
• C. n = \(\frac{sin i}{cos (90^o - i)}\)
• D. n = sin 90^oC

If the position of resonance in a resonance tube is 16.50cm from open end of the tube, calculate the distance from the open end to the next position where resonance occurs. (Neglect end-correction)

• A. 24.75cm
• B. 33.00cm
• C. 41.25cm
• D. 49.50cm

(a) Explain what is meant by cations

(b) Draw and label an electrolytic cell

A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is

• A. 25%
• B. 33%
• C. 50%
• D. 75%

If the Nigeria flag (green, white, green) is viewed in pure yellow light, which of the following set of colours would be observed on the flag?

• A. Green, yellow, green
• B. Red, yellow, red
• C. black, yellow, black
• D. Green, white, green

A body of mass, M, moving with velocity, V, has a wavelength, X, associated with it. This phenomenon is called----------

• A. photoelectric effect
• B. heisenberg's uncertainty principle
• C. compton effect
• D. wave-particles paradox

The force of repulsion between two point positive charges 5\(\mu\)C and 8\(\mu\)C separated at a distance of 0.02 map art is. [\(\frac{1}{4{\pi}{\varepsilon}_o}\) = 9 x 10⁹Nm²C^-2]

• A. 1.8 x 10^-10N
• B. 9.0 x 10^-8N
• C. 9.0 x 10²N
• D. 4.5 x 10³N

A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is

• A. mh
• B. mgh
• C. mgh/50
• D. O

A ray of light travels from air to water. The refeactive index of water is given by the expression

• A. \(\frac{\text{velocity in water}}{\text{velocity in air}}\)
• B. \(\frac{\text{sine of angle of refraction}}{\text{sine of angle of incidence}}\)
• C. \(\frac{\text{apparent depth}}{\text{real depth }}\)
• D. \(\frac{\text{wavelength in air}}{\text{wavelength in water}}\)