Question 1

What happens when free electrons in a metal collide with metal ions?

Accepted Answer

the metal ions vibrate more vigorously

Answer

the metal ions vibrate as before

Answer

the metal ions vibrate less vigorously

Question 2

What causes free electrons in a metal to move?

Accepted Answer

a p.d.

Answer

a resistance

Answer

a current

Question 3

Which of the following effects will result from a higher p.d. across a metal wire in a working electrical circuit?

Question 4

Which of the followings statements about resistors A and B is correct?

Accepted Answer

resistor A has a lower resistance than resistor B

Answer

both resistors have the same resistance

Answer

it is not possible to say which resistor has the higher resistance

Answer

resistor A has a higher resistance than resistor B

Question 5

Which of the following elements is a semiconductor?

Accepted Answer

silicon

Answer

aluminium

Answer

copper

Answer

iron

Question 6

Which of the following statements about the I–V graph shown is correct?

Accepted Answer

as the p.d. increases, the resistance decreases

Answer

the resistance remains the same as the p.d. changes

Answer

as the p.d. increases, the resistance increases

Answer

it is not possible to say if the resistance changes

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