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 metre rule is used to measure a length.Which reading is shown to the nearest millimetre?A 0.7 mB 0.76 mC 0.761 mD 0.7614 m

2009 Summer

Theory

CH2 - FORCES AND MOTION

The graph represents the movement of a body. [Image_1: Graph of speed (m/s) vs time (s)] How far has the body moved after 5s? A 2m B 10m C 25m D...

2009 Summer

Theory

CH2 - FORCES AND MOTION

A car travels 100 km. The highest speed of the car is 90 km/h, and the lowest speed is 30 km/h. The journey takes two hours.What is the average speed ...

2009 Summer

Theory

CH2 - FORCES AND MOTION

Which statement about the masses and weights of objects on the Earth is correct?A. A balance can only be used to compare weights, not masses.B. Heavy ...

2009 Summer

Theory

CH2 - FORCES AND MOTION

The table shows the weight in newtons of a 10 kg mass on each of four planets. [Table_1] | planet | weight of a 10 kg mass / N | |----------|----...

2009 Summer

Theory

CH1 - MEASUREMENTS AND UNITS

Which items of apparatus are required to determine the density of a liquid? A balance and measuring cylinder B balance and thermometer C metre rule...

2009 Summer

Theory

CH2 - FORCES AND MOTION

Which property of an object cannot be changed by a force?A. its massB. its motionC. its shapeD. its size

2009 Summer

Theory

CH3 - FORCES AND PRESSURE

A wooden plank rests in equilibrium on two boulders on opposite sides of a narrow stream. Three forces of size $P$, $Q$ and $R$ act on the plank. How ...

2009 Summer

Theory

CH4 - FORCES AND ENERGY

Electricity can be obtained from different energy resources.Which energy resource is used to obtain electricity without producing heat to boil water?A...

2009 Summer

Theory

CH4 - FORCES AND ENERGY

Four people of equal weight on a beach use different routes to get to the top of a sea wall. Which person produces the greatest average power?[Table_1...

2009 Summer