Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

The spontaneous and random decay of a radioactive substance involves the emission of either $\alpha$-radiation or $\beta$-radiation and/or $\gamma$-ra...

2009 Summer

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

(a) A sample of a radioactive isotope contains $N$ nuclei at time $t$. At time $(t + \Delta t)$, it contains $(N - \Delta N)$ nuclei of the isotope.Fo...

2009 Summer

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

The gold nucleus $^{185}_{79}\text{Au}$ undergoes alpha decay.What are the nucleon (mass) number and proton (atomic) number of the nucleus formed by t...

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

The nuclei of the isotopes of an element all contain the same number of a certain particle. What is this particle?

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

Alpha, beta and gamma radiations1. are absorbed to different extents in solids,2. behave differently in an electric field,3. behave differently in a m...

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

Two $\alpha$-particles with equal energies are fired towards the nucleus of a gold atom. Which diagram best represents their paths?

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

An $\alpha$-particle A approaches and passes by a stationary gold nucleus N. The path is illustrated in Fig. 7.1.(a) On Fig. 7.1, mark the angle of de...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

Tungsten-184 \( \left( ^{184}_{74}\text{W} \right) \) and tungsten-185 \( \left( ^{185}_{74}\text{W} \right) \) are two isotopes of tungsten.Tungsten-...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

The controlled reaction between deuterium $\left(\frac{2}{1}H\right)$ and tritium $\left(\frac{3}{1}H\right)$ has involved ongoing research for many y...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

(a) State what is meant by the decay constant of a radioactive isotope...................................................................................

2009 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a reasonable estimate of the mass of a raindrop?

2020 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

Which quantity is a scalar?

2020 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A galvanometer of resistance 5\(\Omega\) is to be used in a null method.In order to protect the galvanometer from damage due to an excessive initial c...

2020 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

Readings are made of the current $I$ for different voltages $V$ across a fixed resistor. The results are plotted on a graph to show the variation of $...

2020 Summer

MCQ

CH3 - KINEMATICS

A stone is dropped from a height of 20 m above water. The graph shows the variation with time of the velocity of the stone. Which statement describ...

2020 Summer

MCQ

CH3 - KINEMATICS

A car X is travelling at a constant speed $u$ along a straight road. At time $t = 0$ a second car Y is a distance $d_0$ behind car X and travelling at...

2020 Summer

MCQ

CH4 - DYNAMICS

The resultant force acting on an object is slowly increased. Which graph could show the variation with time $t$ of the momentum $p$ of the object?&nb...

2020 Summer

MCQ

CH4 - DYNAMICS

An astronaut has a weight of 660 N when she is standing on the Earth's surface. The acceleration of free fall on the surface of Mars is $3.71 \, \tex...

2020 Summer

MCQ

CH4 - DYNAMICS

A mass $m_1$ travelling with speed $u_1$ collides with a mass $m_2$ travelling with speed $u_2$ in the same direction. After the collision, mass $m_1$...

2020 Summer

MCQ

CH4 - DYNAMICS

The diagrams show a negative electric charge situated in a uniform electric field and a mass situated in a uniform gravitational field. Which row s...

2020 Summer