TUTORIAL HIGH SCHOOL END OF TERM TEST

PHYSICS

Name: Class:

17th March, 2015Section A1. A 6 V battery is connected to a 4 resistor. How much charge flows through the resistor in 30 s?

A 2 C B 4.5 C C 20 C D 45 C

2. A piece of wire 1 m long has an area of cross-section of 2 mm2. Which of the following wire of the same material has twice the resistance?

Length/mArea/mm2

A1.00.25

B0.251.0

C1.02.0

D1.01.0

3. Which of the following changes to wire will half its resistance?

Cross-sectionalArea Length

ADoubleDouble

BDoubleNo change

CNo changeDouble

DHalveNo change

4. The current of 10 A flows in the circuit shown. It splits up when it enters parallel branches of resistors. What is the reading on the ammeter?

8

2 A 2 A B 5 A C 6 A D 12 A

5. Which of the following has volt (V) as its unit?

A Current time C rate of flow of charge

B energy X time D the electron-motive force of a cell6. X and Y are lamps with filaments made of the same material. The filament of lamp X is thinner and longer than that of lamp Y. When connected to the mains and switched on

A X will be the brighter lamp because its filament has a larger resistance.

B X will be the brighter lamp because its filament has a smaller resistance. C Y will be the brighter because its filament has the larger resistance.

D Y will be the brighter lamp because it filament has the smaller resistance.7. A battery drives 40 C of charge around a circuit. The total work done is 900 J. What is the electromotive force of the battery?

A 0.04 V B 22.5 V C 850 V D 950 V

8. The diagram shows a circuit. What is the reading of the voltmeter?

A 1 V

B 1.5 V C 2 V

D 3 V

6 V 4

2 V9. A heater which is to be used on 250 V main circuit, has a 5A fuse in its plug. Which of the following is the most powerful heater that can be used with this fuse?

A 50 W B 500 W C 900 W D 1 100 W

10. Which resistor combination has the lowest resistance?

A C

4 3 5 B D

3 3 5 4 4 5

Section BNo. 1

a. Define Current (2 marks)b. Define the types of current and represent each graphically (4 marks )

c. What is rectification? (2 marks )d. Describe how half-wave rectification is done and what it is useful for. (6 marks )

e. Draw graphs to show a wave before and after rectification. (4 marks )

No. 2

a) Define Magnetism (2 marks )

b) Distinguish between magnetic field and magnetic field lines (3 marks )

c) Draw

I. the magnetic field between two like poles of a bar magnet

II. The magnetic field between two unlike poles of a bar magnet.

III. The domains in a magnetized and an un-magnetized material. (6 marks )

d) What are electromagnets? (2 marks)

e) Describe ways in which the strength of an electromagnet can be increased. ( 5 marks )

3 4 5