Yr11 Physics Revision Test

The temperature of an ideal gas is a measure of the molecules’ average:

• Velocity

• Momentum

• Kinetic Energy

• Frequency of Collisions

If the substance is in state B and is cooled down and undergoes a phase change, which of the following occurs to the substance?

• It stays as state B.

• It changes to state C.

• It changes to a liquid.

• It changes to state A.

The current in a resistor is measured as 2.00 A. Which of the following correctly identifies the absolute uncertainty and the percentage uncertainty in the current?

• A

• B

• C

• D

An Ohm’s law experiment was conducted and the results plotted as the graph in Figure 2.
Which of the following shows the resistance of the resistor used in the experiment when the current  $I=I_1$  ? 

• The slope of the line at the point  $V_1I_1$  

• The slope of the line from 0,0 to the point  $V_1I_1$  

•  $\frac{V_1}{I_1}$  

•  $\frac{I_1}{V_1}$  

Two 20 Ω resistors are connected as shown in Figure 3.

• 1 Ω

• 10 Ω

• 15 Ω

• 50 Ω

A particular nuclear reaction produces 100 MJ of energy. Calculate the loss of mass in kg during the reaction. 

 $\Delta m=\frac{\Delta E}{c^2}$  

•  $12.33\ \times10^{-9\ }kg$  

•  $1.11\ \times10^{-9\ }kg$  

•  $2.071\ \times10^{-9\ }kg$  

•  $9.0913\ \times10^{-9\ }kg$  

• 0-5s

• 5-10s

• 10-15s

• 15-20s

A ball tossed vertically upward rises, reaches its highest point and then falls back to its starting point. During this time the acceleration of the ball is always:

• in the direction of motion.

• opposite its velocity.

• directed upward.

• directed downward.

A boy pulls a 50 kg crate horizontally with a force of 450 N and the friction force on the crate is 250 N. The acceleration of the crate is:

• $2ms^{-2}$

• $4ms^{-2}$

• $9ms^{-2}$

• $1ms^{-2}$

A ball is projected into the air with 200 J of kinetic energy that is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is:

• 0 J

• less than 200 J but not 0 J

• 200 J

• more than 200 J