OCR AS Level Physics

What are the six SI units?

A Systematic error is the [blank_start]same[blank_end] every time you repeat an experiment. A [blank_start]Random[blank_end] error is different each time you repeat an experiment.

A result is deemed accurate if it is judged to be [blank_start]close[blank_end] to the [blank_start]actual value[blank_end]. Precision is the [blank_start]degree of exactness[blank_end] to which the measurement of quantity or value can be obtained and [blank_start]reproduced consistently[blank_end].

Which six quantities are scalar quantities?

Which five quantities are vectors quantities?

Displacement is [blank_start]how far[blank_end] an object has traveled from the [blank_start]starting point[blank_end] in a [blank_start]given direction[blank_end].

Velocity is the [blank_start]rate of change of displacement[blank_end].

The gradient of a displacement-time graph represents what?

The gradient of a velocity-time graph represents what?

The area under a velocity-time graph represents what?

To investigate how the distance a trolley has rolled affects its speed, this is the method: 1. Measure the length of trolley 2. Mark [blank_start]start[blank_end] line 3. Measure [blank_start]angle[blank_end] ramp is to the [blank_start]horizontal[blank_end] and distance from start line to light gate 4. Place trolley on ramp and [blank_start]let go[blank_end] (do not push) 5. The data logger will record the time taken for the trolley to pass through the light gate and calculate the [blank_start]velocity[blank_end] of the trolley as it passes through the gate. 6. change starting position and repeat [blank_start]3[blank_end] or more times

When investigating acceleration due to gravity, what is the equation to work out h?

In projectile motion, the vertical component of an object stays constant.

Which two values can you work out using the vertical component in projectile motion?

What does the area under a force-time graph represent?

A moment is the [blank_start]turning[blank_end] effect of a [blank_start]force[blank_end].

The principle of moments states: the sum of the clockwise moments = the sum of the anticlockwise moments. Is this true?

Gravitational Potential Energy is the [blank_start]energy[blank_end] an object has due to its [blank_start]position[blank_end] in the [blank_start]gravitational field[blank_end].

What is the equation for working out GPE?

What are the three factors affecting drag?

Newton's First Law: a body will remain at [blank_start]rest[blank_end] or continue to travel in a straight line at a [blank_start]constant speed[blank_end], unless acted upon by a [blank_start]net force[blank_end]. Newton's Second Law: Rate of [blank_start]change of momentum[blank_end] of an object is directly [blank_start]proportional[blank_end] to the [blank_start]net force[blank_end] applied to that object. Newton's Third Law: Every action has an [blank_start]equal[blank_end] and [blank_start]opposite[blank_end] reaction.

What is the special case of Newton's Second Law?

Current is the flow of [blank_start]electrons[blank_end] in a metal and ions in an [blank_start]electrolyte[blank_end].

Kirchoff's first law is: the total current entering a junction is equal to the total current exiting it.

Kirchoff's second law is: the total e.m.f around a [blank_start]series[blank_end] circuit is equal to the sum of [blank_start]p.d[blank_end]s across each [blank_start]component[blank_end]

Semiconductors have fewer charge carriers that in a metal, what needs to be higher so that the same current can flow?

What electrical component is this?

What electrical component does this I-V graph represent?

Which electrical component does this I-V graph represent?

What electrical component does this I-V graph represent?

Lost volts is the [blank_start]energy wasted per coulomb[blank_end] overcoming the [blank_start]internal resistance[blank_end].

Which one of the following answers is correct?

Electromagnetic Waves are transverse waves consisting of vibrating [blank_start]electric[blank_end] and magnetic [blank_start]fields[blank_end].

The principle of superposition says that: When two or more waves cross, the [blank_start]resultant displacement[blank_end] equals the [blank_start]vector sum[blank_end] of the [blank_start]individual displacements[blank_end].

For two waves to be coherent, they must have the same [blank_start]frequency[blank_end] and [blank_start]wavelength[blank_end] and have a [blank_start]fixed phase difference[blank_end].

With which wavelength do you get the lowest resonant frequency in a pipe with one end open and the other closed?

With which wavelength do you get the lowest resonant frequency in a pipe with both ends closed?

How do you convert J to eV?