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

When a force $F$ moves its point of application through a displacement $s$ in the direction of the force, the work $W$ done by the force is given by $...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a possible unit for the product $VI$, where $V$ is the potential difference across a resistor and $I$ is the current through the same resistor...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a reasonable estimate of the average kinetic energy of an athlete during a 100 m race that takes 10 s?

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A light-meter measures the intensity $I$ of the light falling on it. Theory suggests that $I$ varies inversely as the square of the distance $d$. W...

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

In an experiment, a radio-controlled car takes $2.50 \pm 0.05$ s to travel $40.0 \pm 0.1$ m. What is the car’s average speed and the uncertaint...

2012 Summer

MCQ

CH3 - KINEMATICS

In an experiment to determine the acceleration of free fall using a falling body, what would lead to a value that is too large?

2012 Summer

MCQ

CH3 - KINEMATICS

Which feature of a graph allows acceleration to be determined?

2012 Summer

MCQ

CH3 - KINEMATICS

The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length $L$. The feather takes tim...

2012 Summer

MCQ

CH3 - KINEMATICS

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches poi...

2012 Summer

MCQ

CH5 - FORCES, DENSITY & PRESSURE

Each option gives a correct word equation involving force. Which option gives the definition of force?

2012 Summer