Theory

CH16 - COMMUNICATION

(a) Fig. 13.1 is a block diagram illustrating part of a mobile phone handset used for receiving a signal from a base station.Complete Fig. 13.1 by lab...

2009 Summer

Theory

CH16 - COMMUNICATION

(a) State and explain two advantages of the transmission of information in digital, rather than analogue, form. 1. .....................................

2009 Winter

Theory

CH16 - COMMUNICATION

(a) State the name of this type of modulated transmission................................................................................................

2009 Winter

Theory

CH16 - COMMUNICATION

A block diagram representing part of a mobile phone network is shown in Fig. 12.1. (a) State what is represented by(i) the blocks labelled X, ...........

2009 Winter

Theory

CH16 - COMMUNICATION

Many radio stations now broadcast on FM rather than on AM. In general, FM is broadcast at much higher frequencies than AM.(a) Explain what is meant by...

2010 Summer

Theory

CH16 - COMMUNICATION

A ground station on Earth transmits a signal of frequency 14 GHz and power 18 kW towards a communications satellite orbiting the Earth, as illustrated...

2010 Summer

Theory

CH16 - COMMUNICATION

A telephone link between two towns is to be provided using an optic fibre. The length of the optic fibre between the two towns is 75 km.(a) State two ...

2010 Summer

Theory

CH16 - COMMUNICATION

A telephone link between two towns is to be provided using an optic fibre. The length of the optic fibre between the two towns is 75 km.(a) State two ...

2010 Summer

Theory

CH16 - COMMUNICATION

(a) Wire pairs provide one means of communication but they are subject to high levels of noise and attenuation. Explain what is meant by(i) \textit{no...

2010 Winter

Theory

CH16 - COMMUNICATION

(a) Outline the principles of the use of a geostationary satellite for communication on Earth............................................................

2010 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

Which unit can be expressed in base units as kg m^2 s^{-2}?

2019 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

The luminosity $L$ of a star is given by $L = 4\pi r^2 \sigma T^4$ where $r$ is the radius of the star, $T$ is the temperature of the star and $\si...

2019 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A particle has velocity $V$ at an angle $\theta$ to the horizontal. The components of the particle’s velocity are $V_v$ upwards in the vertical dire...

2019 Summer

MCQ

CH14 - WAVES

A whale produces sound waves of frequency 5 Hz. The waves are detected by a microphone and displayed on an oscilloscope. What is the time-base sett...

2019 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

The speed shown on a car's speedometer is proportional to the rate of rotation of the tyres. The variation of the diameter of a tyre as it wears intro...

2019 Summer

MCQ

CH3 - KINEMATICS

A car travels along a straight horizontal road. The graph shows the variation of the velocity $v$ of the car with time $t$ for 6.0 s of its journey. ...

2019 Summer

MCQ

CH3 - KINEMATICS

A stone is thrown horizontally from the top of a cliff and falls into the sea some time later. Air resistance is negligible. Which graph shows how th...

2019 Summer

MCQ

CH17 - ELECTRIC FIELDS

A positive charge of $2.6 \times 10^{-8} \text{ C}$ is in a uniform electric field of field strength $300000 \text{ Vm}^{-1}$. How much work must be ...

2019 Summer

MCQ

CH4 - DYNAMICS

Each diagram illustrates a pair of forces of equal magnitude. Which diagram gives an example of a pair of forces that is described by Newton's third ...

2019 Summer

MCQ

CH3 - KINEMATICS

A stone is dropped from a tall building. Air resistance is significant. The variation of distance fallen with time is shown by the dashed line. A sec...

2019 Summer