Theory

CH21 - ELECTRONICS

(a) By reference to an amplifier, explain what is meant by \textit{negative feedback}....................................................................

2009 Summer

Theory

CH21 - ELECTRONICS

An amplifier incorporating an operational amplifier (op-amp) has three inputs A, B and C, as shown in Fig. 9.1.Negative feedback is provided by the re...

2009 Winter

Theory

CH21 - ELECTRONICS

(a) (i) On Fig. 9.1, mark, with the letter X, the virtual earth. [1](ii) Explain what is meant by a virtual earth........................................

2010 Summer

Theory

CH21 - ELECTRONICS

(a) Negative feedback may be used in amplifier circuits. State(i) what is meant by negative feedback,....................................................

2010 Summer

Theory

CH21 - ELECTRONICS

(a) Negative feedback may be used in amplifier circuits. State(i) what is meant by \textit{negative feedback},...........................................

2010 Summer

Theory

CH21 - ELECTRONICS

An amplifier circuit incorporating an operational amplifier (op-amp) is shown in Fig. 9.1.Fig. 9.1(a) State(i) the name of this type of amplifier circ...

2010 Winter

Theory

CH21 - ELECTRONICS

An amplifier circuit incorporating an operational amplifier (op-amp) is shown in Fig. 9.1.[Image_1: Diagram showing an operational amplifier circuit]F...

2010 Winter

Theory

CH21 - ELECTRONICS

(a) State three properties of an ideal operational amplifier (op-amp).1. ................................................................................

2010 Winter

Theory

CH21 - ELECTRONICS

(a) An operational amplifier (op-amp) may be used as a comparator. State the function of a comparator....................................................

2011 Summer

Theory

CH21 - ELECTRONICS

(a) State two effects of negative feedback on the gain of an amplifier incorporating an operational amplifier (op-amp). 1. .............................

2011 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

A student creates a table to show reasonable estimates of some physical quantities. Which row is not a reasonable estimate? [Table_1]

2017 Summer

MCQ

CH3 - KINEMATICS

A particle travels in a straight line with speed $v$. The particle slows down and changes direction. The new speed of the particle is $\frac{v}{2}$. ...

2017 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

The speed $v$ of a liquid leaving a tube depends on the change in pressure $\Delta P$ and the density $\rho$ of the liquid. The speed is given by the ...

2017 Summer

MCQ

CH3 - KINEMATICS

The values of displacement, velocity and acceleration of a vehicle can be deduced from graphs representing its motion. Often the areas under these gra...

2017 Summer

MCQ

CH4 - DYNAMICS

A ball is released from rest above a hard, horizontal surface. The graph shows how the velocity of the bouncing ball varies with time. At which point...

2017 Summer

MCQ

CH3 - KINEMATICS

A ball is kicked upwards at an angle of 45° to horizontal ground. After a short flight, the ball returns to the ground. It may be assumed that ai...

2017 Summer

MCQ

CH4 - DYNAMICS

The mass of a rocket-propelled truck is approximately equal to the mass of the fuel in its tank. The fuel is ignited and the truck is propelled along ...

2017 Summer

MCQ

CH3 - KINEMATICS

An object is dropped at time $t = 0$ from a high building. Air resistance is significant. Three graphs are plotted against time. The height of the...

2017 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A student attempts to find the density $\rho$ of aluminium by taking measurements of a rectangular sheet. mass $m = 51.6 \pm 0.1$ g length $l = 100.0 ...

2017 Summer

MCQ

CH4 - DYNAMICS

The graph shows how the momentum of a motorcycle changes with time. What is the resultant force on the motorcycle? 

2017 Summer