Flashcards
Physics mod P6 Electricity and gadgets
Cards in this deck (26)
- 1Briefly explain what causes resistance in a metal conductor?.
- 2Find the current when a resistance of 96 is connected to a battery of 12v.
- 3Four resistors with a resistance of 2,4,6 and 3 are connected in a circuit in parallel. Calculate the total resistance of the circuit?.
- 4Explain how potential dividers work?.
- 5State the formula for potential dividers. Do you own worked example.
- 6Write down two facts each about: a)LDRs b) thermistors.
- 7Question 8 look at it in the book Nath, you need to draw.
- 8Question 9 too Nath, look at it in the book, drawing again.
- 9What are AND gates made from?.
- 10Explain how an LED can be used to show the output of a logic gate?.
- 11Question 12 Nath time to draw again please-make a sketch of a relay.
- 12Give a definition of a magnetic field.
- 13Q,s 14 and 15 look in the book again Nath, some more sketching.
- 14Explain how Fleming's left hand rule works.
- 15Q17 Nath, look in the book, sketch time.
- 16What is electromagnetic induction? List four factors which affect the size of the induced voltage..
- 17Q19 Nath......guess what.....look in the book and sharpen your pencil.
- 18Q20 look in the book again please Nath, pencil at the ready.
- 19In a transformer, the primary voltage is 6v, the primary current is 10A and the secondary voltage is 3V. What is the secondary current in the treansformer?.
- 20A transformer has an input voltage of 20V and an output voltage of 16V. If there are 64 turns on the secondary coil, how many turns are there on the primary coil?.
- 21Explain why power is transmitted at such high voltage?.
- 22Write down three facts about isolating transformers.
- 23Explain briefly how a diode works. What semiconducting material are diodes often made of ?.
- 24Explain the two ways in which an AC current can be rectified. Include circuit diagrams and voltage time graphs in your explanation......sorry time to get the pencil out again Natty.
- 25What is a capacitor? How can it be used to smooth rectified voltage?.
- 26Electronic components are getting smaller. Explain why this could be a bad thing for : a) manufacturers of electronic devices b) users of electronic devices.
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- Physics Flashcards on Physics mod P6 Electricity and gadgets, created by NJW330 on 27/03/2014.
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