Theory

CH24 - ALTERNATING CURRENTS

(a) State what is meant by the frequency of an alternating current. ....................................................................................

2024 Winter

5

Theory

CH24 - ALTERNATING CURRENTS

A circuit contains a power supply that provides a sinusoidal alternating input voltage $V_{IN}$. There is an output voltage $V_{OUT}$ across a load re...

2024 Summer

7

Theory

CH24 - ALTERNATING CURRENTS

(a) State the purpose of the circuit in Fig. 7.1.........................................................................................................

2024 Summer

4

Theory

CH24 - ALTERNATING CURRENTS

A varying current $I$ passes through a resistor of resistance $R$ in the circuit shown in Fig. 7.1.Fig. 7.2 shows the variation with time $t$ of $I$.T...

2023 Winter

4

Theory

CH24 - ALTERNATING CURRENTS

Four diodes are used in a bridge rectifier circuit to produce rectification of a sinusoidal a.c. input voltage $V_{IN}$. Fig. 7.1 shows part of the ci...

2023 Summer

7

Theory

CH24 - ALTERNATING CURRENTS

An electron in a metal rod moves randomly about a mean position. When an alternating voltage is applied to the ends of the rod, the mean position can ...

2023 Winter

4

Theory

CH24 - ALTERNATING CURRENTS

A varying current $I$ passes through a resistor of resistance $R$ in the circuit shown in Fig. 7.1.[Image_1: Fig. 7.1]Fig. 7.2 shows the variation wit...

2023 Winter

3

Theory

CH24 - ALTERNATING CURRENTS

Fig. 5.1 shows four diodes and a load resistor of resistance 1.2 kΩ, connected in a circuit that is used to produce rectification of an alternating v...

2022 Summer

4

Theory

CH24 - ALTERNATING CURRENTS

(a) A sinusoidal alternating voltage has a root-mean-square (r.m.s.) potential difference (p.d.) of 4.2 V and a frequency of 50 kHz.(i) The alternatin...

2022 Winter

5

Theory

CH24 - ALTERNATING CURRENTS

Fig. 5.1 shows four diodes and a load resistor of resistance 1.2 kΩ, connected in a circuit that is used to produce rectification of an alternating v...

2022 Summer

5

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) State what is meant by a $\text{scalar}$ quantity and by a $\text{vector}$ quantity. [2] (b) Complete Fig. 1.1 to indicate whether each of t...

2018 Summer

2

Theory

CH3 - KINEMATICS

(a) State what is meant by the mass of a body. [1] (b) Two blocks travel directly towards each other along a horizontal, frictionless surface. T...

2018 Summer

3

Theory

CH14 - WAVES

(a) For a progressive wave, state what is meant by (i) the period,   [1] (ii) the wavelength.   [1] (b) Fig. 4.1 shows the vari...

2018 Summer

2

Theory

CH14 - WAVES

(a) When monochromatic light is incident normally on a diffraction grating, the emergent light waves have been diffracted and are coherent. Explain w...

2018 Summer

2

Theory

CH19 - CURRENT OF ELECTRICITY

(a) Define the volt............................................................................................................... [1](b) A battery of...

2018 Summer

2

Theory

CH17 - ELECTRIC FIELDS

A $\beta^{-}$ particle from a radioactive source is travelling in a vacuum with kinetic energy 460 eV. The particle enters a uniform electric field at...

2018 Summer

3

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) Define force. .....................................................................................................................[1] (b) State...

2018 Summer

3

Theory

CH3 - KINEMATICS

(a) State the principle of conservation of momentum. [2] (b) A stationary firework explodes into three different fragments that move in a horizontal ...

2018 Summer

3

Theory

CH3 - KINEMATICS

A child on a sledge slides down a steep hill and then travels in a straight line up an ice-covered slope, as illustrated in Fig. 3.1. The sledge pa...

2018 Summer

3

Theory

CH14 - WAVES

(a) (i) Define the wavelength of a progressive wave.   [1] (ii) State what is meant by an antinode of a stationary wave.   [1] (...

2018 Summer

3