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P2 quiz hard stuff

P2 quiz hard stuff

Question 1 of 20

1

What does the gradient on a distance time graph represent?

Select one of the following:

  • velocity

  • distance travelled

  • momentum

  • acceleration

  • speed

Explanation

Question 2 of 20

1

What does gradient of the line on a velocity time graph represent?

Select one of the following:

  • speed

  • acceleration

  • velocity

  • distance travelled

  • kinetic energy

Explanation

Question 3 of 20

1

The stopping distance of a vehicle is the equal to:

Select one or more of the following:

  • the sum of the reaction time and the braking time

  • the sum of the breaking distance and the distance travelled in during the reaction time

  • the sum of the thinking distance the breaking time

  • the sum of the thinking distance and the breaking distance

  • the product of the breaking time and the thinking distance

Explanation

Question 4 of 20

1

the current potential difference graph for a resistor at a constant temperature is:

Select one of the following:

  • line x=0

  • line y=0

  • line y=x

  • line y=-x

  • y=x until halfway up the graph where it remains as y= (halfway up the y scale)

Explanation

Question 5 of 20

1

The greater the resistance, the __________ the current, for a component at a given _________.

Select one or more of the following:

  • greater

  • smaller

  • altitude

  • voltage

  • charge

  • resistance

  • faster

Explanation

Question 6 of 20

1

For components connected in series:

Select one or more of the following:

  • the total resistance is the sum of the resistance in all the components

  • the P.D is the same across all the components

  • the charge is constantly changing in all the components

  • same current through each component

  • the total current through the whole circuit is the sum of the currents through the separate components.

  • the potential difference of the supply is the shared between the components

Explanation

Question 7 of 20

1

Mains electricity is a.c.

Select one of the following:

  • True
  • False

Explanation

Question 8 of 20

1

Mains electricity has a frequency of:

Select one of the following:

  • 60Hz

  • 70Hz

  • 80Hz

  • 50Hz

  • 230Hz

Explanation

Question 9 of 20

1

The units of charge are

Select one of the following:

  • volts

  • joules

  • ampere

  • watts

  • kilowatts

  • couloumbs

Explanation

Question 10 of 20

1

What comes directly after the main sequence of a star about the size of our sun?

Select one of the following:

  • white dwarf

  • black dwarf

  • red super giant

  • nebula

  • red giant

Explanation

Question 11 of 20

1

One eventual outcome for a huge star is a black hole, what is the other?

Select one of the following:

  • Supernova

  • White dwarf

  • Nebula

  • Neutron star

Explanation

Question 12 of 20

1

The current through a resistor is inversely proportional to the potential difference across the resistor.

Select one of the following:

  • True
  • False

Explanation

Question 13 of 20

1

RCCBs operate by detecting a difference between:

Select one of the following:

  • The temperature of the wire and its surroundings

  • The resistance in the plug and in the appliance.

  • The current in the live wire and the current in the neutral wire.

  • The voltage in the live wire and the current in the neutral wire.

  • The voltage in the live wire and the voltage in the neutral wire.

Explanation

Question 14 of 20

1

The frequency of Ultrasound is:

Select one of the following:

  • 20Hz to 20kHz

  • 20kHz to 200kHz

  • 20Hz to 200Hz

  • 20kHz+

  • 200kHz+

  • 2000kHz+

Explanation

Question 15 of 20

1

The equivalent of the retina in a camera is the film.

Select one of the following:

  • True
  • False

Explanation

Question 16 of 20

1

In an optical fibre cable, the light is totally internally reflected because the angle of incidence always remains:

Select one of the following:

  • greater than the angle of refraction.

  • the same.

  • equal to the angle of refraction

  • smaller than the angle of refraction.

  • greater than the critical angle.

  • equal to the critical angle.

  • smaller than the critical angle.

Explanation

Question 17 of 20

1

If an object is turning, the clockwise moment must be exactly balanced to the anticlockwise moment.

Select one of the following:

  • True
  • False

Explanation

Question 18 of 20

1

In the motor effect, the size of the force can be increased by:

Select one or more of the following:

  • Increasing the voltage

  • Increasing the current

  • Increasing the charge

  • Increasing the size of the magnet

  • increasing the magnetic field strength

Explanation

Question 19 of 20

1

In a step up transformer the p.d across the secondary coil is greater than the p.d across the primary coil.

Select one of the following:

  • True
  • False

Explanation

Question 20 of 20

1

Switch mode transformers work at a _________ frequency

Select one of the following:

  • high

  • low

Explanation

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