Multiple choice 2017.s.1

Which diagram shows the distance-time graph for an object moving with constant speed?

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A student stands with both feet on some scales in order to measure his weight. The reading on the scales is 500N. He lifts one foot off the scales and keeps it lifted. What is the new reading on the scales?

• A 0

• B 250N

• C 500N

• D 1000N

A student places four identical beakers on a bench. Two beakers contain salt water of density 1.1 g / cm3 and two beakers contain pure water of density 1.0 g/ cm3 . The quantity of water in each beaker is shown. Which beaker exerts the greatest pressure on the bench?

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The list contains three energy resources, P, Q and R.

P geothermal energy from hot rocks

Q nuclear fission in reactors

R sunlight on solar panels. Which of these resources are renewable?

• A P, Q and R

• B P and Q only

• C P and R only

• D Q and R only

Bread can be cooked by placing it below a heating element. Which process transfers thermal energy from the heating element to the bread?

• A conduction

• B convection

• C evaporation

• D radiation

Which waves are longitudinal?

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A glass block is surrounded by air. The diagram shows what happens to a ray of light inside the glass block when it reaches the edge of the block. Angle i is changed so that total internal reflection takes place. How is angle i changed and which ray then disappears?

• A

• B

• C

• D

Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in space. What does astronaut 2 hear compared with the sound heard if they were working on Earth?

• A a louder sound

• B a quieter sound

• C a sound of the same loudness

• D no sound at all

The N-pole of a magnet repels one end of bar X. What happens when the other end of bar X is placed near to the poles of the magnet?

• A

• B

• C

• D

A battery is connected to an ammeter and a resistor of resistance 1.5 × 103Ω. The reading on the ammeter is 3.0 mA. What is the potential difference (p.d.) across the battery?

• A 0.50V

• B 1.5V

• C 2.0V

• D 4.5V