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- @What current flows if 30 coulombs of charge are moved in 10s?
- 3 A
- 30 A
- 300 A
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- @An experiment produces an a.c output, measured on an oscilloscope. The root-mean-square (rms), or effective value, is:
- #scope1
- slightly less then the amplitude of the trace shown
- exactly the same value as the amplitude of the wave
- dependent on the number of waves shown on the screen
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- @The energy an object has because of its height is called:
- Potential energy
- Kinetic energy
- Displacement energy
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- @If a ticker tape is made by an object which is accelerating, then the dots:
- Get further apart
- Remain a constant distance apart
- Gradually get closer together
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- @A trolley has two forces acting on it. If f1=12 N and f2=14 N then the trolley:
- #for4
- Moves to the left with a 2 N force acting on it
- Moves to the right with a 26 N force acting on it
- Moves to the right with a 2 N force acting on it
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- @If a car travels at 80 kph, how long will it take to travel 100 km?
- 75 minutes
- 1.25 minutes
- 48 minutes
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- @For aircraft, at high altitudes, which one of the following is correct?
- The pressure inside the cabin is greater than that outside
- The pressures inside and out must be exactly the same
- There is greater pressure outside the aircraft than inside
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- @For equilibrium to occur in turning forces, which one of the following must be true?
- The clockwise moment equals the anticlockwise moment
- The clockwise moment is just larger than
- The clockwise moment must be zero
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- @Which one of the following is a vector?
- Velocity
- Density
- Speed
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- @A metal spoon in a hot drink soon becomes warm because of:
- Conduction
- Radiation
- Convection
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- @A fridge works on the principle of:
- Evaporation
- Convection
- Sublimation
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- @Liquids expand when heated:
- More than solids
- More than gases
- The same as solids
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- @Since solid glass sinks in water, what can you say about the density of glass?
- It is greater than water
- It's less than water
- It is less than the density of the surrounding air
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- @Which one of the following produces the least amount on ionisation?
- Gamma rays
- Beta particles
- Alpha particles
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- @Which unit is used to measure power?
- Watt
- Joule
- Coulomb
-
- @Which combination of colours is in the correct order for a spectrum?
- Orange, yellow, green and blue
- Red, yellow, green and violet
- Yellow, orange, blue and violet
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- @Which one of the following colours has the longest wavelength?
- Red
- Blue
- Green
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- @Which lens is a converging lens?
- #lens2
- Lens y
- Lens x
- Lens z
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- @What is ultra-sonic sound?
- Sound waves of a very high frequency
- Very quick moving sound waves
- Long wavelength sound waves
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- @What device is used to measure the flow of current?
- Ammeter
- Voltmeter
- Thermocouple
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- @If a current flows through a thin wire, which of the following effects are produced?
- Heat & a magnetic effect
- A magnetic field
- Heat
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- @If one ampere is flowing through a circuit then:
- 1 coulomb is flowing each second
- There is 1 ohm of resistance in the circuit
- Each coulomb carries 1 joule of energy
-
- @Which one of the following statements about electrons is correct?
- They have a negative charge
- They have no charge
- They have a small positive charge
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- @1 Watt is:
- The rate of using energy at a rate of 1 Joule per second
- Moving 1 Kg a distance of 1 m
- Lifting a 1Kg mass up 1 m in 1 minute
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- @An object, deep in space, moves at a constant velocity because:
- There are no forces acting
- Gravity pulls it
- It is weightless
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