Theory

CH10 - ELECTRON AND ELECTRONICS

In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission.What are these particles?A. $\alpha$-particlesB. electronsC. p...

2009 Summer

Theory

CH10 - ELECTRON AND ELECTRONICS

The diagram shows a cathode-ray tube. A student wants the cathode rays to make a spot at P on the screen. Which parts of the cathode-ray tube should...

2009 Summer

Theory

CH10 - ELECTRON AND ELECTRONICS

The diagram shows a beam of cathode rays entering an electric field.In which direction is the beam deflected by the field?A downwardB upwardC into the...

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

To create cathode rays in a vacuum, what might be a suitable potential difference to connect between the cathode and anode? A. 6V a.c. B. 6V d.c. C...

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

The diagram shows a beam of cathode rays entering an electric field. In which direction is the beam deflected by the field? A. downwards B. upward...

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

To create cathode rays in a vacuum, what might be a suitable potential difference to connect between the cathode and anode?A. 6V a.c.B. 6V d.c.C. 600V...

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

Fig. 11.1 is a schematic diagram of an electronic circuit controlling a lamp.(a) State the names of the logic gates A and B.A ...........................

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

Fig. 11.1 is an electronic circuit controlling an electric heater.The relay contacts close when there is a current in the relay coil.(a) State the nam...

2009 Winter

Theory

CH10 - ELECTRON AND ELECTRONICS

A cathode-ray tube has an anode and an earthed cathode.Which row shows the charge on the anode and the temperature of the cathode?[Table_1]Table 1:| ...

2010 Summer

Theory

CH10 - ELECTRON AND ELECTRONICS

A cathode-ray tube has an anode and an earthed cathode.Which row shows the charge on the anode and the temperature of the cathode?[Table_1] | | anod...

2010 Summer

Theory

CH1 - MEASUREMENTS AND UNITS

The diagram shows an enlarged drawing of the end of a metre rule. It is being used to measure the length of a small feather. What is the length of the...

2011 Summer

Theory

CH2 - FORCES AND MOTION

An object moves initially with constant speed and then with constant acceleration. Which graph shows this motion?

2011 Summer

Theory

CH6 - WAVES AND SOUNDS

A tennis player hits a ball hard and 0.40 s later hears the echo from a wall. The speed of sound in air is 330 m/s.How far away is the player from the...

2011 Summer

Theory

CH2 - FORCES AND MOTION

Which statement about mass and weight is correct?A. Mass and weight are both forces.B. Neither mass nor weight is a force.C. Only mass is a force.D. O...

2011 Summer

Theory

CH3 - FORCES AND PRESSURE

The diagram shows a balance being used to find the weight of a baby. The weight of the basket can be ignored.At equilibrium, the pivot is nearer to th...

2011 Summer

Theory

CH1 - MEASUREMENTS AND UNITS

A cube of side 2.0 cm is placed on a balance. What is the density of the cube? A. 0.90 g/cm³ B. 1.2 g/cm³ C. 1.8 g/cm³ D. 3.6 g/cm³

2011 Summer

Theory

CH3 - FORCES AND PRESSURE

Objects with different masses are hung on a spring. The diagram shows how much the spring stretches.The extension of the spring is directly proportion...

2011 Summer

Theory

CH4 - FORCES AND ENERGY

Which row gives an example of the stated form of energy?[Table_1]form of energy | exampleA gravitational | the energy due to the movement of a train a...

2011 Summer

Theory

CH4 - FORCES AND ENERGY

Which energy resource is used to generate electricity by first boiling water? A. hydroelectric B. nuclear fission C. tides D. waves

2011 Summer

Theory

CH4 - FORCES AND ENERGY

Two farmers use an electrically powered elevator to lift bales of hay. All the bales of hay have the same mass. As sunset approaches, they increase...

2011 Summer