Theory

CH23 - ELECTROMAGNETIC INDUCTION

A metal wheel consists of an axle A, eight spokes and a rim, as shown in Fig. 1.1. Point X is on the rim at the end of one of the spokes. The rim ...

2024 Winter

3

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) State Faraday’s law of electromagnetic induction. ................................................................................................

2024 Summer

7

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) Define magnetic flux density. ......................................................................................................................

2023 Winter

4

Theory

CH23 - ELECTROMAGNETIC INDUCTION

A heavy aluminium disc has a radius of 0.36 m. The disc rotates with the wheels of a vehicle and forms part of an electromagnetic braking system on th...

2023 Summer

5

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) State what is meant by a magnetic field..............................................................................................................

2023 Summer

5

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) A Hall probe containing a thin slice of semiconducting material is placed in a uniform magnetic field of flux density $B$. The largest faces of th...

2023 Winter

4

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) Define magnetic flux density. .......................................................................................................................

2023 Winter

5

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) State Lenz's law of electromagnetic induction........................................................................................................

2022 Winter

4

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) State Lenz's law.....................................................................................................................................

2021 Summer

4

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) State Lenz's law....... [2](b) A metal ring is suspended from a fixed point P by means of a thread, as shown in Fig. 10.1.[Image_1: Fig. 10.1 show...

2021 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