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 unit is not an SI base unit?

2023 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

What is the best estimate of the number of atoms in a piece of metal of volume 50 cm$^3$?

2023 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A copper pipe has a true diameter of 42.03 mm.A builder measures the diameter of the pipe five times using digital calipers. The measurements are show...

2023 Summer

MCQ

CH3 - KINEMATICS

Two forces, each of 10 N, act at a point P, as shown. The angle between the directions of the forces is 120°. What is the magnitude of the result...

2023 Summer

MCQ

CH3 - KINEMATICS

One object moves directly from P to R. In a shorter time, a second object moves from P to Q to R. Which statement about the two objects is correct...

2023 Summer

MCQ

CH3 - KINEMATICS

A ball is kicked so that it has an initial velocity of 12 m s⁻¹ at an angle of 50° to horizontal ground. Assume that air resistance is neg...

2023 Summer

MCQ

CH4 - DYNAMICS

A camera drone of mass 1.20 kg hovers at a fixed point above the ground. The drone has four propellers. In a time of 1.00 s, each propeller pushes ...

2023 Summer

MCQ

CH4 - DYNAMICS

A box rests on the Earth, as shown. Newton’s third law describes how forces of the same type act in pairs. One of the forces of a pair is the w...

2023 Summer

MCQ

CH5 - FORCES, DENSITY & PRESSURE

A small ball is held at the surface of liquid oil in a container. The ball is released from rest and falls through the oil. The ball has velocity $v$....

2023 Summer

MCQ

CH4 - DYNAMICS

An object of mass $m$, moving at speed $u$ along a frictionless horizontal surface, collides head-on with a stationary object of mass $4m$. After t...

2023 Summer