Theory

CH23 - ELECTROMAGNETIC INDUCTION

You are provided with a coil of wire, a bar magnet and a sensitive ammeter.Outline an experiment to verify Lenz’s law.

2009 Summer

Theory

CH23 - ELECTROMAGNETIC INDUCTION

An ideal transformer is illustrated in Fig. 6.1.(a) (i) State Faraday’s law of electromagnetic induction...............................................

2009 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

A simple iron-cored transformer is illustrated in Fig. 6.1.Fig. 6.1(a) (i) State why the primary and secondary coils are wound on a core made of iron....

2010 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

A simple iron-cored transformer is illustrated in Fig. 6.1.(a) (i) State why the primary and secondary coils are wound on a core made of iron............

2010 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

The poles of a horseshoe magnet measure 5.0 cm × 2.4 cm, as shown in Fig. 5.1. The uniform magnetic flux density between the poles of the magnet is 8...

2010 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

A transformer is illustrated in Fig. 6.1.(a) (i) Explain why the coils are wound on a core made of iron..................................................

2011 Summer

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) Use Fig. 3.2 to(i) state the evidence for the magnet to be undergoing free oscillations during the period $t = 0$ to $t = 4.0 \, \text{s}$,..........

2011 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

(a) Use Fig. 3.2 to(i) state the evidence for the magnet to be undergoing free oscillations during the period $t = 0$ to $t = 4.0 \text{s},$.............

2011 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

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

2012 Winter

Theory

CH23 - ELECTROMAGNETIC INDUCTION

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

2012 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

Which quantity with its unit is correct?

2016 Summer

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

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

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

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

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

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

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

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

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