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Physics

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Question

Which is the correct relationship between current, voltage and resistance?

answer

Current = voltage x resistance

Voltage = current x resistance

Resistance = current x voltage

Question

What force keeps the planets in orbit?

answer

Gravity

Magnetism

Friction

Question

Which object is the densest?

answer

Neutron star

Supernova

Black hole

Question

What happens to the resistance of a resistor when the temperature is increased?

answer

It decreases

It stays the same

It increases

Question

Which of the following types of electromagnetic radiation has the longest wavelength?

answer

X-rays

Microwaves

Infra-red radiation

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