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 unit can be expressed in base units as kg m^2 s^{-2}?

2019 Summer

3

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 and $\si...

2019 Summer

3

MCQ

CH2 - MEASUREMENT TECHNIQUES

A particle has velocity $V$ at an angle $\theta$ to the horizontal. The components of the particle’s velocity are $V_v$ upwards in the vertical dire...

2019 Summer

2

MCQ

CH14 - WAVES

A whale produces sound waves of frequency 5 Hz. The waves are detected by a microphone and displayed on an oscilloscope. What is the time-base sett...

2019 Summer

2

MCQ

CH2 - MEASUREMENT TECHNIQUES

The speed shown on a car's speedometer is proportional to the rate of rotation of the tyres. The variation of the diameter of a tyre as it wears intro...

2019 Summer

3

MCQ

CH3 - KINEMATICS

A car travels along a straight horizontal road. The graph shows the variation of the velocity $v$ of the car with time $t$ for 6.0 s of its journey. ...

2019 Summer

3

MCQ

CH3 - KINEMATICS

A stone is thrown horizontally from the top of a cliff and falls into the sea some time later. Air resistance is negligible. Which graph shows how th...

2019 Summer

3

MCQ

CH17 - ELECTRIC FIELDS

A positive charge of $2.6 \times 10^{-8} \text{ C}$ is in a uniform electric field of field strength $300000 \text{ Vm}^{-1}$. How much work must be ...

2019 Summer

3

MCQ

CH4 - DYNAMICS

Each diagram illustrates a pair of forces of equal magnitude. Which diagram gives an example of a pair of forces that is described by Newton's third ...

2019 Summer

3

MCQ

CH3 - KINEMATICS

A stone is dropped from a tall building. Air resistance is significant. The variation of distance fallen with time is shown by the dashed line. A sec...

2019 Summer

3