Theory

CH9 - MAGNETS AND CURRENTS

(a) The transformer in Fig. 8.1 is used to convert 240V a.c. to 6V a.c.Fig. 8.1(i) Using the information above, calculate the number of turns on the s...

2010 Summer

2

Theory

CH9 - MAGNETS AND CURRENTS

(a) Fig. 9.1 illustrates the left hand rule, which helps when describing the force on a current-carrying conductor in a magnetic field.Fig. 9.1One dir...

2010 Summer

1

Theory

CH9 - MAGNETS AND CURRENTS

(a) In Fig. 8.1, a magnet is moving towards one end of a solenoid connected to a sensitive centre-zero meter. During this movement a current is induce...

2011 Winter

3

Theory

CH9 - MAGNETS AND CURRENTS

The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result, magnetic poles are induced in the iron bar. [Image_1...

2009 Summer

3

Theory

CH9 - MAGNETS AND CURRENTS

An electromagnet is used to separate magnetic metals from non-magnetic metals. Why is steel unsuitable as the core of the electromagnet?A It forms a p...

2009 Summer

2

Theory

CH9 - MAGNETS AND CURRENTS

Which statement about a magnet is not correct?A. It can attract another magnet.B. It can attract an unmagnetised piece of iron.C. It can repel another...

2010 Winter

2

Theory

CH9 - MAGNETS AND CURRENTS

A chain of steel nails and a chain of iron nails hang from a strong magnet. The chains are then carefully removed from the magnet.What happens to the ...

2010 Winter

2

Theory

CH9 - MAGNETS AND CURRENTS

Four nails, A, B, C and D, are tested to find which makes the strongest permanent magnet.One of the nails is placed against a bar magnet and the numbe...

2011 Winter

3

Theory

CH9 - MAGNETS AND CURRENTS

A horseshoe magnet is brought near to an unmagnetised iron bar. [Image_1: Diagram of horseshoe magnet with labeled N and S poles near an iron bar] W...

2011 Winter

3

Theory

CH9 - MAGNETS AND CURRENTS

Which diagram represents the direction of the magnetic field around a straight wire carrying a current out of the page?

2011 Winter

4

MCQ

CH1 - MEASUREMENTS AND UNITS

The diagram shows an enlarged drawing of the end of a metre rule. It is being used to measure the length of a small feather. What is the length of th...

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

The speed-time graph shown is for a car moving in a straight line. What is the acceleration of the car when the time is 40s?

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

Two runners take part in a race. The graph shows how the speed of each runner changes with time. What does the graph show about the runners at time $t...

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

A satellite orbits the Earth above the atmosphere at a constant speed. The diagram shows the satellite at one point in its circular orbit around the E...

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

A cup contains hot liquid.Some of the liquid evaporates.What happens to the mass and what happens to the weight of the liquid in the cup?[Table_1]

2016 Summer

1

MCQ

CH3 - FORCES AND PRESSURE

The diagrams show three uniform beams P, Q, and R, each pivoted at its centre. The two forces acting on each beam are also shown. Which beams rotate c...

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

An object of mass 50 kg accelerates from a velocity of 2.0 m/s to a velocity of 10 m/s in the same direction.What is the impulse provided to cause thi...

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

A scalar quantity has

2016 Summer

1

MCQ

CH4 - FORCES AND ENERGY

Energy is released in some nuclear reactions. Which nuclear reaction takes place in a nuclear power station, and which nuclear reaction takes place in...

2016 Summer

1

MCQ

CH4 - FORCES AND ENERGY

A lorry of mass 4000 kg is travelling at a speed of 4.0 m/s. A car has a mass of 1000 kg. The kinetic energy of the car is equal to the kinetic energ...

2016 Summer

1