Theory

CH20 - D.C. CIRCUITS

(a) (i) State what is meant by rectification of an alternating voltage...................................................................................

2024 Winter

4

Theory

CH20 - D.C. CIRCUITS

(a) State Kirchhoff’s first law......................................................................................... [1](b) A cell with internal...

2024 Summer

4

Theory

CH20 - D.C. CIRCUITS

(a) (i) State what is meant by rectification of an alternating voltage...................................................................................

2024 Winter

4

Theory

CH20 - D.C. CIRCUITS

(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

CH20 - D.C. CIRCUITS

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

2024 Winter

6

Theory

CH20 - D.C. CIRCUITS

(a) Fig. 7.1 shows two resistors connected in series with a cell of electromotive force (e.m.f.) 1.50 V and internal resistance 0.28 Ω. Fig. 7.1One ...

2024 Winter

4

MCQ

CH20 - D.C. CIRCUITS

Kirchhoff’s second law is a consequence of a basic principle. What is this principle?

2024 Winter

5

MCQ

CH20 - D.C. CIRCUITS

The diagram shows a circuit with a light-dependent resistor (LDR).The ammeter reads zero current.What is the resistance of the LDR?

2024 Winter

6

MCQ

CH20 - D.C. CIRCUITS

A torch uses three lamps connected in parallel and is powered by a cell of electromotive force (e.m.f.) 3.0 V and negligible internal resistance. Each...

2024 Winter

5

MCQ

CH20 - D.C. CIRCUITS

A fixed resistor and a diode are combined by connecting them in series. The total potential difference $V$ across the combination is varied and the co...

2024 Winter

3

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

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

2020 Summer

3

MCQ

CH2 - MEASUREMENT TECHNIQUES

Which quantity is a scalar?

2020 Summer

3

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

3

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

3

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

2

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

4

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

1

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

3

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

3

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

2