Theory

CH19 - CURRENT OF ELECTRICITY

Lightning occurs when charge builds up in the atmosphere, creating a potential difference between the ground and the atmosphere. During a lightning s...

2024 Summer

4

Theory

CH19 - CURRENT OF ELECTRICITY

(a) State Kirchhoff’s second law.......................................................................................................................

2024 Summer

5

Theory

CH19 - CURRENT OF ELECTRICITY

(a) (i) State Kirchhoff’s second law...................................................................................................................

2024 Summer

8

Theory

CH19 - CURRENT OF ELECTRICITY

(a) State what is meant by the work done by a force......................................................................................................

2024 Winter

7

Theory

CH19 - CURRENT OF ELECTRICITY

(a) Define electric potential difference (p.d.). [1] (b) A power supply, three resistors and a component X are connected in the circuit shown The ...

2024 Winter

5

Theory

CH19 - CURRENT OF ELECTRICITY

(a) Define resistance. .................................................................................................................................

2024 Winter

6

MCQ

CH19 - CURRENT OF ELECTRICITY

What is the definition of potential difference across a component?

2024 Summer

5

MCQ

CH19 - CURRENT OF ELECTRICITY

The diagram shows a cell of negligible internal resistance connected to a switch and two resistors of resistances $R$ and $2R$.The circuit also contai...

2024 Summer

4

MCQ

CH19 - CURRENT OF ELECTRICITY

The $I-V$ characteristics for four components, A, B, C and D, are shown. Which component has the greatest resistance when the potential difference acr...

2024 Summer

4

MCQ

CH19 - CURRENT OF ELECTRICITY

A cylindrical wire has cross-sectional area $A$ and number density of free electrons $n$. The wire has current $I$ and the free electrons have average...

2024 Summer

3

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

Which quantity with its unit is correct?

2016 Summer

2

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

3

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

3

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

2

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

3

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

2

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

3

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

3

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

3

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

3