What do we use X-rays in hospitals for?
Why are X-rays dangerous?
What can we say about the absorption of X-rays when they pass through the body?
What is a C.T. scan?
What are ultrasound waves?
What are ultrasound waves used for in medicine?
Why is an ultrasound scan safer than a X-ray?
What do we mean by the refractive index of a transparent substance?
How can we calculate the refractive index?
What do we mean by the critical angle of a substance?
How is the critical angle related to the refractive index of the substance?
What do we mean by total internal reflection?
What do doctors use an endoscope for?
What is a converging lens?
What is a diverging lens?
What is a real image?
What is a virtual image?
What do we mean by magnification?
How can we find the position and nature of an image formed by a lens?
How does the eye work?
What is the range of vision of the human eye?
What do we mean by the power of a lens?
What is short sight and how do we correct it?
What is long sight and how do we fix it?
Why is the refractive index of glass important in making spectacle lenses?
what does the moment of a force measure?
How do we calculate the moment of a force?
How can we increase the moment of a force?
What is the centre of mass of an object?
What can we say about the centre of mass of an object that is suspended from a fixed point?
What can we say about the centre of mass of a symmetrical object?
If an object is in equilibrium the sum of the anticlockwise movements about any point equal...?
What can be done to increase the stability of an object?
What will make a body topple over?
An object topples over if...?
What do we mean by pressure?
What can we say about the pressure in a liquid?
How is pressure transmitted in a hydraulic system?
What is centripetal force?
What affects the time period of a pendulum?
How do you measure the time period of a pendulum accurately?
What do we mean by magnetic field lines?
How do we make electromagnets?
What are electromagnets used for?
What is the motor effect?
In the motor effect the force is...?
How is the motor effect used to make objects move?
What is electromagnetic induction?
how can a magnet be used to induce potential difference across the ends of the conductor?
How can potential difference be induced if a electromagnet is used instead of a magnet?
Why do transformers only work with ac?
What is the core of a transformer made from?
How does a switch mode transformer differ from an ordinary transformer?
Why are transformers used on the national grid?
What is the transformer equation?
What is the difference between a step down and step up transformer?
What can we say about a transformer which is 100% efficient?
How do we use physics in hospitals?