Topcis 1 and 2

1. 1An insulator can be charged by friction

   1. AVerdadero
   2. BFalso
2. 2A [blank_start]gold[blank_end]-leaf e[blank_start]lectroscope[blank_end] is used to find the charge on an [blank_start]insulator[blank_end]. A metal rod connects a metal cap to a [blank_start]gold[blank_end] leaf.
   Bringing a n[blank_start]egatively[blank_end] charged rod close to the cap will repel the [blank_start]electrons[blank_end] down the metal rod, causing the leaf to move [blank_start]away[blank_end] from the metal rod because they have the same charge. The greater the charger, the further the leaf moves.
   The same occurs when a p[blank_start]ositively[blank_end] charged rod is brought close to the metal cap.

   1. Agold
   2. Blectroscope
   3. Cinsulator
   4. Dgold
   5. Eegatively
   6. Felectrons
   7. Gaway
   8. Hositively
3. 3Label the diagram

   

   1. Apositively charged
   2. Bthe direction of the field
   3. Celectric force field
4. 4What can most charged objects be made safe by?

   1. Aearthing
   2. Bgrounding
   3. Copposite charges
5. 5Grounding involves placing a metal conductor between the charged object and the earth to channel the charges safely to the earth

   1. AVerdadero
   2. BFalso
6. 6Fuelling aircraft and tankers causes [blank_start]static[blank_end] as the [blank_start]fuel[blank_end] rubs against the pipe; the c[blank_start]harges[blank_end] can build up and create a s[blank_start]park[blank_end], igniting the fuel. This is why aircrafts and tanks are [blank_start]earthed[blank_end] when fuelling.

   1. Astatic
   2. Bfuel
   3. Charges
   4. Dpark
   5. Eearthed
7. 7Why do some tall buildings have a pointed spike on the top of them?

   1. Ato protect the building from lightning
   2. Bto warn planes of their locations
   3. Cto use as a satellite
8. 8Voltage is the rate of flow of charge

   1. AVerdadero
   2. BFalso
9. 9What do cells and batteries provide?

   1. Aalternating current
   2. Bdirect current
10. 10What is charge measured in?

    1. Acoulombs
    2. Bvolts
    3. Camps

11. 11Potential energy across a component is defined as the energy transferred per unit charge

    1. AVerdadero
    2. BFalso
12. 12What does a voltmeter measure?

    1. Apotential difference
    2. Bcurrent
    3. Ccharge
13. 13What can be determined form the readings of a voltmeter and ammeter?

    1. Aresistance
    2. Bpotential difference
    3. Ccharge
    4. Ddirect current
14. 14[blank_start]resistance[blank_end] (ohm) = potential difference ([blank_start]volts[blank_end]) / current ([blank_start]amps[blank_end])

    1. Aresistance
    2. Bcharge
    3. Celectric power
    4. Dvolts
    5. Eamps
    6. Fjoule
    7. Gcoulomb
    8. Hamps
    9. Ivolts
    10. Jjoule
    11. Kcoulomb
15. 15[blank_start]potential difference[blank_end] (volts) = energy ([blank_start]joule[blank_end]) / [blank_start]charge[blank_end] (coulomb)

    1. Apotential difference
    2. Bresistance
    3. Cpower
    4. Djoule
    5. Eamp
    6. Fwatt
    7. Gcharge
    8. Hpower
    9. Icurrent
    10. Jpotential difference
16. 16What is the device called which is made form a semiconductor material that conducts in one direction only?

    1. Afilament lamp
    2. Bdiode
    3. Cfixed resistor
17. 17When a current flows, e[blank_start]lectrons[blank_end] travel through the l[blank_start]attice[blank_end] of metal. The electric current causes h[blank_start]eating[blank_end], which is a result of the collisions between electrons and the i[blank_start]ons[blank_end] in the lattice. The c[blank_start]ollisions[blank_end] cause increased v[blank_start]ibrations[blank_end], which is what we mean by h[blank_start]eat[blank_end] energy.

    1. Alectrons
    2. Battice
    3. Ceating
    4. Dons
    5. Eollisions
    6. Fibrations
    7. Geat
18. 18A [blank_start]light[blank_end]-dependent resistor is a special type of resistor made from a s[blank_start]emiconductor[blank_end] material. The resistance of an LDR [blank_start]decreases[blank_end] as the intensity of light incident increases, so more light means [blank_start]more[blank_end] resistance. These are used in simple light meters and circuits for automatically detecting how much light enters a c[blank_start]amera[blank_end].
    A [blank_start]thermistor[blank_end] is a special type of resistor that depends on temperature. The resistance of it decreases as the temperature [blank_start]increases[blank_end], so the greater the temperature the less the resistance. These are sued in simple electrical thermometers and on a circuit to switch on a fan inside your l[blank_start]aptop[blank_end] when it overheats.

    1. Alight
    2. Bemiconductor
    3. Cdecreases
    4. Dless
    5. Eamera
    6. Fthermistor
    7. Gincreases
    8. Haptop
19. 19Increasing the temperature of a metal significantly changes the number of conduction electrons

    1. AVerdadero
    2. BFalso
20. 20Thermistors made from wither semiconductors or metal oxides free up more electrons form the atoms when the temperature increases, causing

    1. Aresistance to increase
    2. Bresistance to decrease

Descripción

GCSE (P2) Triple Science Test sobre Topcis 1 and 2, creado por ljo99 el 14/04/2016.

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ljo99

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