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

When a force $F$ moves its point of application through a displacement $s$ in the direction of the force, the work $W$ done by the force is given by $...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a possible unit for the product $VI$, where $V$ is the potential difference across a resistor and $I$ is the current through the same resistor...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a reasonable estimate of the average kinetic energy of an athlete during a 100 m race that takes 10 s?

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A light-meter measures the intensity $I$ of the light falling on it. Theory suggests that $I$ varies inversely as the square of the distance $d$. W...

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

In an experiment, a radio-controlled car takes $2.50 \pm 0.05$ s to travel $40.0 \pm 0.1$ m. What is the car’s average speed and the uncertaint...

2012 Summer

MCQ

CH3 - KINEMATICS

In an experiment to determine the acceleration of free fall using a falling body, what would lead to a value that is too large?

2012 Summer

MCQ

CH3 - KINEMATICS

Which feature of a graph allows acceleration to be determined?

2012 Summer

MCQ

CH3 - KINEMATICS

The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length $L$. The feather takes tim...

2012 Summer

MCQ

CH3 - KINEMATICS

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches poi...

2012 Summer

MCQ

CH5 - FORCES, DENSITY & PRESSURE

Each option gives a correct word equation involving force. Which option gives the definition of force?

2012 Summer