Theory

CH25 - QUANTUM PHYSICS

(a) Explain why, for the photoelectric effect, the existence of a threshold frequency and a very short emission time provide evidence for the particul...

2009 Summer

Theory

CH25 - QUANTUM PHYSICS

(a) Explain how a line emission spectrum leads to an understanding of the existence of discrete electron energy levels in atoms. .......................

2009 Winter

Theory

CH25 - QUANTUM PHYSICS

(a) A typical spectrum of the X-ray radiation produced by electron bombardment of a metal target is illustrated in Fig. 10.1.Explain why(i) a continuo...

2009 Winter

Theory

CH25 - QUANTUM PHYSICS

A $\pi^0$ meson is a sub-atomic particle. A stationary $\pi^0$ meson, which has mass $2.4 \times 10^{-28}$ kg, decays to form two $\gamma$-ray photons...

2010 Summer

Theory

CH25 - QUANTUM PHYSICS

(a) Briefly explain the principles of CT scanning........................................................................................................

2010 Summer

Theory

CH25 - QUANTUM PHYSICS

(a) State an effect, one in each case, that provides evidence for (i) the wave nature of a particle, ....................................................

2010 Winter

Theory

CH25 - QUANTUM PHYSICS

(a) State an effect, one in each case, that provides evidence for (i) the wave nature of a particle, ..................................................

2010 Winter

Theory

CH25 - QUANTUM PHYSICS

(a) By reference to the photoelectric effect, state what is meant by the threshold frequency.............................................................

2010 Winter

Theory

CH25 - QUANTUM PHYSICS

(a) (i) State, with reference to X-ray images, what is meant by sharpness. .............................................................................

2010 Winter

Theory

CH25 - QUANTUM PHYSICS

The linear attenuation (absorption) coefficient $\mu$ for X-ray radiation in bone, fat and muscle is given in Fig. 11.1.$$\begin{array}{|c|c|} \hline ...

2010 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

Which quantity with its unit is correct?

2016 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, $\sig...

2016 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

The diagram shows two vectors X and Y, drawn to scale. If X = Y − Z, which diagram best represents the vector Z?

2016 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

The diagram shows a cathode-ray oscilloscope (c.r.o.) being used to measure the rate of rotation of a flywheel.The flywheel has a small magnet M mount...

2016 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A student determines the density $\rho$ of steel by taking measurements from a steel wire. mass $m = 6.2 \pm 0.1 \text{ g}$ length $l = 25.0 \pm 0.1 \...

2016 Summer

MCQ

CH3 - KINEMATICS

The acceleration of free fall on the Moon is $1.6 \, \text{m}\,\text{s}^{-2}$. The Moon has no atmosphere. An astronaut standing on the surface of the...

2016 Summer

MCQ

CH3 - KINEMATICS

A tennis ball is released from rest at the top of a tall building. Which graph best represents the variation with time $t$ of the acceleration $a$ of ...

2016 Summer

MCQ

CH3 - KINEMATICS

The graph shows how the velocity $v$ of an object moving in a straight line varies with time $t$ from $t = 0$ to $t = T$. Which graph represents th...

2016 Summer

MCQ

CH4 - DYNAMICS

A ball falls vertically onto horizontal ground and rebounds, as shown. The ball has momentum $p_1$ downwards just before hitting the ground. After ...

2016 Summer

MCQ

CH4 - DYNAMICS

A sphere falls from rest through the air. The graph shows the variation with time of the sphere’s velocity. Which diagram shows the forces ac...

2016 Summer