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

Theory

CH2 - MEASUREMENT TECHNIQUES

Measurements made for a sample of metal wire are shown in Fig. 1.1. Fig. 1.1 (a) State the appropriate instruments used to make each of these meas...

2011 Summer

2

Theory

Kinetic Energy

(a) Explain what is meant by work done. [1] (b) A car is travelling along a road that has a uniform downhill gradient, as shown in Fig. 2.1. ...

2011 Summer

3

Theory

CH5 - FORCES, DENSITY & PRESSURE

(a) Explain what is meant by centre of gravity. (b) Define moment of a force. (c) A student is being weighed. The student, of weight $W$, stands 0.3...

2011 Summer

3

Theory

CH9 - DEFORMATION OF SOLIDS

(a) Define, for a wire, (i) stress,    [1] (ii) strain.    [1] (b) A wire of length 1.70 m hangs vertically from a fixed point,...

2011 Summer

3

Theory

CH20 - D.C. CIRCUITS

(a) A variable resistor is used to control the current in a circuit, as shown in Fig. 5.1. The variable resistor is connected in series with a 12V po...

2011 Summer

1

Theory

CH5 - FORCES, DENSITY & PRESSURE

(a) State two assumptions of the simple kinetic model of a gas.   [2] (b) Use the kinetic model of gases and Newton's laws of motion to exp...

2011 Summer

3

Theory

CH15 - SUPERPOSITION

(a) Explain the term interference.   [1] (b) A ripple tank is used to demonstrate interference between water waves. Describe (i) the appa...

2011 Summer

2

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) Distinguish between scalar quantities and vector quantities. [2] (b) In the following list, underline all the scalar quantities. accelerati...

2011 Summer

4

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) A sphere of radius $R$ is moving through a fluid with constant speed $v$. There is a frictional force $F$ acting on the sphere, which is given by ...

2011 Summer

2

Theory

Potential Energy

(a) (i) Explain what is meant by work done. [1] (ii) Define power. [1] (b) Fig. 3.1 shows part of a fairground ride with a carriage on rai...

2011 Summer

2