exam 3

Question 1

charge time current

Answer 1

Charge = current x time

Question 2

two things other than fuses

Answer 2

Earth wire

Double insulation

Question 3

charge voltage energy transferred

Answer 3

Energy transferred = charge x voltage

Question 4

volt unit

Answer 4

V

Question 5

voltage power current

Answer 5

Voltage = current x resistance

Question 6

energy transferred charge voltage resistance

Answer 6

Energy transferred = charge x voltage x resistance

Question 7

straight graph

Answer 7

wire

Question 8

bends a bit then straight up

Answer 8

diode

Question 9

curvy lines

Answer 9

metal filament lamp

Question 10

resistance voltage current

Answer 10

Voltage = current x resistance

Question 11

experiment one

Answer 11

Start with the resistance of the variable resistor fixed at a high level. Then take a reading of current from the ammeter and voltage from the voltmeter. Decrease the resistance of the variable resistor in equal steps and take another pair of readings each time. Repeat the experiment and take averages. Plot the averages on a graph

Question 12

constant velocity

Answer 12

When an object falls its weight causes it to accelerate towards the ground.
Resistive forces act on it in the opposite direction to its motion.
As the object speed increase the resistive force increases until these balance the downwards force of the objects weight
So there is no resultant force so it travels at a constant