Eduqas A-Level Physics Electricity and DC circuits overview quiz quiz

$I = \frac{V}{R}$

$I = \frac{Q}{V}$

$I = \frac{\rho L}{A}$

$I = nAvq$

Semiconductors have far fewer free charge carriers (smaller n)

Semiconductors simply have a higher resistivity than metals do

The charge carried by each carrier is much larger in a semiconductor

The semiconductor wire used is always made much thinner

An S-shaped curve through the origin

A straight line through the origin

A curve that conducts only in forward bias

A horizontal line

Four times the original resistance value

Exactly twice the original resistance value

The same as the original

Exactly half of the original resistance value

$\varepsilon + Ir$

$Ir$

$\frac{\varepsilon}{r}$

$\varepsilon - Ir$

It decreases

It increases

It stays the same

It becomes zero

Their capacitances simply add together directly, just like resistors in series

By reciprocals: $\frac{1}{C} = \frac{1}{C_1} + \frac{1}{C_2}$

The total capacitance equals that of the largest single capacitor

The total capacitance of the combination is always zero

$1.0 \times 10^{-3}\ \text{J}$

$0.50\ \text{J}$

$5.0 \times 10^{-3}\ \text{J}$

$1.0\ \text{J}$

The time taken for the capacitor to discharge completely to zero charge

The time taken for the charge on the capacitor to halve

The time taken for the stored charge to double in size

The time to fall to $\frac{1}{e}$ (about 37%) of the initial value

The ratio of stress to strain in the linear region

The maximum stress at which the material finally breaks

The elastic energy stored per unit volume of the material

The force needed per unit of extension of the material

Stress

Strain

The Young modulus

The force constant

$0.50\ \text{J}$

$2.5\ \text{J}$

$0.25\ \text{J}$

$5.0\ \text{J}$