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

A cylindrical can is rolled along the ruler shown in the diagram.The can rolls over twice.What is the circumference (distance all round) of the can?A ...

2012 Summer

Theory

CH2 - FORCES AND MOTION

A car is moving downhill along a road at a constant speed. Which graph is the speed/time graph for the car?

2012 Summer

Theory

CH2 - FORCES AND MOTION

In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours.What is the average speed of the car?A 1.5 km/h B 90 km/h C 144 km/h D 2...

2012 Summer

Theory

CH3 - FORCES AND PRESSURE

Which quantity is measured in newtons? A) density B) energy C) pressure D) weight

2012 Summer

Theory

CH3 - FORCES AND PRESSURE

A geologist places a small rock on the left-hand pan of a balance. The two pans are level as shown when masses with a total weight of 23 N are placed ...

2012 Summer

Theory

CH1 - MEASUREMENTS AND UNITS

A stone has a volume of 0.50 cm3 and a mass of 2.0 g.What is the density of the stone?A. 0.25 g/cm3B. 1.5 g/cm3C. 2.5 g/cm3D. 4.0 g/cm3

2012 Summer

Theory

CH2 - FORCES AND MOTION

Passengers are not allowed to stand on the upper deck of double-decker buses.upper decklower deckWhy is this?A. They would cause the bus to become les...

2012 Summer

Theory

CH3 - FORCES AND PRESSURE

The diagram shows a handle with three forces, each 100 N, applied to it. The handle is free to move.What is the effect of the forces on the handle?A T...

2012 Summer

Theory

CH4 - FORCES AND ENERGY

In which pair of energy sources are both sources renewable?A. oil and coalB. oil and tidalC. tidal and geothermalD. tidal and nuclear fission

2012 Summer

Theory

CH4 - FORCES AND ENERGY

An object on a thread is swinging between X and Z, as shown in the diagram. It is momentarily at rest at X and at Z.An incomplete word equation about ...

2012 Summer