SS3 Physics 1st Term

1. An electric motor is a machine that converts —2005, Q43

2. A constantin wire has a cross sectional area of 4 x 10^-8 m² and resistivity of 1.1 x 10^-6 ? m. If a resistor of resistance 11 is to be made from this wire, calculate the length of the wire required. 2005, Q39

3. Which of the following quantities has the same unit as energy? 2005, Q16

4. Masses,m₁ and m₂ at the 20-cm and 65-cm marks respectively of a uniform metre rule freely suspended at its centre of gravity. If the metre rule balances horizontally, determine the ratio m₂ : m₁ 2005, Q8

5. The ability of a material to store an electric charge when its plates are at different potentials is referred to as its —2005, Q33

6. Water falls through a height of 50 m. determine the temperature rise of the water at the bottom of the fall. [Neglect energy losses. Specific heat capacity of water = 4200 J kg^-1 K^-1, g = 10 ms^-2] 2005, Q21

7. Which of the following statements explains lost volt in an electric circuit? The —2005, Q38

8. Which of the following source of energy is renewable? 2005, Q17

9. Which of the following simple machines is a second class lever? 2005, Q6

10. Which of the following about an object performing simple harmonic motion is correct? Its acceleration — 2005, Q13