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 geologist compares the volumes of three rocks, X, Y and Z. Three measuring cylinders contain different volumes of water. He places each rock into on...

2015 Summer

Theory

CH2 - FORCES AND MOTION

A car moves with constant speed and then constant acceleration.Which graph is the speed-time graph for the car?[Image_1: Graphs A, B, C, D]

2015 Summer

Theory

CH2 - FORCES AND MOTION

A car travels 100 km. The journey takes two hours. The highest speed of the car is 80 km/h, and the lowest speed is 40 km/h. What is the average spee...

2015 Summer

Theory

CH2 - FORCES AND MOTION

Diagram 1 shows a piece of foam rubber that contains many pockets of air. Diagram 2 shows the same piece of foam rubber after it has been compressed s...

2015 Summer

Theory

CH1 - MEASUREMENTS AND UNITS

A metal block has the dimensions shown. Its mass is 1000 g.What is the density of the metal?A $\left(\frac{5 \times 10}{1000 \times 2}\right)$ g/cm$^3...

2015 Summer

Theory

CH3 - FORCES AND PRESSURE

Four objects are each acted on by only two forces, as shown.Which object is in equilibrium?

2015 Summer

Theory

CH3 - FORCES AND PRESSURE

A student measures the length of a spring. She then hangs different weights from the spring. She measures the length of the spring for each different ...

2015 Summer

Theory

CH4 - FORCES AND ENERGY

Which energy resource is used to generate electricity without using any moving parts?A. geothermalB. hydroelectricC. nuclearD. solar

2015 Summer

Theory

CH4 - FORCES AND ENERGY

A cyclist travels down a hill from rest at point X, without pedalling.The cyclist applies his brakes and the cycle stops at point Y.Which energy chang...

2015 Summer

Theory

CH3 - FORCES AND PRESSURE

The diagram shows a simple mercury barometer.Which height is used as a measurement of atmospheric pressure?

2015 Summer