Theory

CH10 - ELECTRON AND ELECTRONICS

Fig. 11.1 shows the main components of a cathode-ray oscilloscope.(a) State the purpose of(i) the heater,................................................

2011 Winter

2

Theory

CH10 - ELECTRON AND ELECTRONICS

When no circuit is connected to the input of a cathode-ray oscilloscope (CRO), there is a horizontal trace across the middle of the screen.Fig. 11.1 s...

2010 Winter

4

Theory

CH10 - ELECTRON AND ELECTRONICS

(a) In the space below, draw the symbol for an OR gate.[1](b) Describe the action of an OR gate in terms of its inputs and outputs.......................

2011 Summer

2

Theory

CH10 - ELECTRON AND ELECTRONICS

In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission.What are these particles?A. $\alpha$-particlesB. electronsC. p...

2009 Summer

4

Theory

CH10 - ELECTRON AND ELECTRONICS

The diagram shows a cathode-ray tube. A student wants the cathode rays to make a spot at P on the screen. Which parts of the cathode-ray tube should...

2009 Summer

2

Theory

CH10 - ELECTRON AND ELECTRONICS

An electric field is set up between two parallel plates.An image is shown with cathode rays directed into this field, parallel to the plates: In which...

2010 Winter

2

Theory

CH10 - ELECTRON AND ELECTRONICS

Cathode rays are emitted in a vacuum tube. They consist of particles that are found in atoms.What is the name of the particles and how are the cathode...

2011 Winter

4

Theory

CH10 - ELECTRON AND ELECTRONICS

The diagram shows a device to produce cathode rays.Which part of the device is heated and why?[Table_1]

2012 Summer

3

Theory

CH10 - ELECTRON AND ELECTRONICS

Two parallel metal plates in a vacuum are connected to the terminals of a high-voltage power supply. A beam of cathode rays is passed into the space b...

2011 Winter

4

Theory

CH10 - ELECTRON AND ELECTRONICS

A student is using a cathode-ray oscilloscope to display the waveform of an alternating current supply. The arrangement is shown in Fig. 10.1.When swi...

2010 Summer

3

MCQ

CH1 - MEASUREMENTS AND UNITS

Which quantity can be measured directly using a micrometer screw gauge?

2019 Summer

1

MCQ

CH2 - FORCES AND MOTION

The velocity of an object increases from 30 m/s to 50 m/s in 5.0 seconds.What is the average acceleration of the object?

2019 Summer

1

MCQ

CH2 - FORCES AND MOTION

A heavy metal ball falls vertically downwards through air past four equally spaced levels J, K, L and M.The times taken to fall from one level to the ...

2019 Summer

1

MCQ

CH2 - FORCES AND MOTION

A body is moved from place X to place Y where the gravitational field strength is different. What happens to its mass and to its weight due to the mov...

2019 Summer

1

MCQ

CH1 - MEASUREMENTS AND UNITS

The diagrams show four solid blocks with their dimensions and masses.Which block has the greatest density?

2019 Summer

1

MCQ

CH3 - FORCES AND PRESSURE

A student wishes to determine the spring constant of a spring where it obeys Hooke’s law. Different loads are hung from the spring and its length is...

2019 Summer

1

MCQ

CH2 - FORCES AND MOTION

A mass of 20 kg is held stationary by a rope passing over a frictionless pulley. What is the tension $T$ in the rope?

2019 Summer

2

MCQ

CH2 - FORCES AND MOTION

A boat starts moving across a river at velocity $v$ perpendicular to the river bank. The boat encounters a current along the river of velocity $u$, as...

2019 Summer

1

MCQ

CH2 - FORCES AND MOTION

A ball of mass 0.50 kg falls and hits the floor at 10 m/s. It rebounds at speed 8.0 m/s, as shown. The collision between the ball and the floor las...

2019 Summer

1

MCQ

CH4 - FORCES AND ENERGY

An object falls from the top of a building that is 25 m high. Air resistance is negligible.What is the speed of the object when it hits the ground?

2019 Summer

3