(a)

State what is meant by a magnetic field.

[ 2 ]

[Maximum number: 1]

A uniform magnetic field of flux density B makes an angle $\theta$ with a flat plane PQRS , as shown in Fig. 5.1.

Fig. 5.1

The plane PQRS has area A.

(a)

State

[ 1 ]

(i)

what is meant by a magnetic field,

[ 1 ]

(a)

State the type of field, or fields, that may cause a force to be exerted on a particle that is

[ 2 ]

(i)

uncharged and moving,

[ 1 ]

(ii)

charged and stationary,

[ 1 ]

(a)

Charged parallel plates, as shown in Fig. 7.1, produce a uniform electric field between the plates.

Fig. 7.1

The electric field outside the region between the plates is zero.
A uniform magnetic field is applied in the region between the plates so that a beam of protons passes undeviated between the plates.

[ 2 ]

(i)

State and explain the direction of the magnetic field between the plates.

[ 2 ]

(a)

State what is meant by a magnetic field.

[ 2 ]

[Maximum number: 6]

Magnetic resonance imaging (MRI) requires the use of a non-uniform magnetic field superimposed on a large uniform magnetic field.

State and explain the purpose of

(a)

the large uniform magnetic field,

[ 3 ]

(b)

the non-uniform magnetic field.

[ 3 ]

[Maximum number: 4]

A person is to be investigated using a magnetic resonance (MR) scanner.

(a)

This technique involves the use of two superimposed magnetic fields. Describe the functions of these two magnetic fields.

[ 4 ]

[Maximum number: 2]

During magnetic resonance imaging to obtain information about internal body structures, a large constant magnetic field is used with a calibrated non-uniform magnetic field superimposed on it.

(a)

State and explain the purpose of

[ 2 ]

(i)

the large constant magnetic field,

[ 2 ]

Question 5

Question 5(a)

Question 5

Question 5(a)

Question 5(a)(i)

Question 6

Question 6(a)

Question 6(a)(i)

Question 6(a)(ii)

Question 7

Question 7(b)

Question 7(b)(i)

Question 6

Question 6(a)

Question 10

Question 10(a)

Question 10(b)

Question 12

Question 12(a)

Question 13

Question 13(a)

Question 13(a)(i)