1Which of these has the same dimensions as time?
Time and time period both have the dimensions [T].
SI base quantitiesClass 11, Units and Measurements
Dimensional formula of Time
[T]
The SI base quantity for duration. Time interval, period and half-life all have this dimension.
How to get the dimensional formula of time
- Time is one of the seven SI base quantities, so its dimension is written directly: [T].
Quantities with the dimensions [T]
Equal dimensions do not make them the same quantity. Compare time with the others in the full grid.
Three questions on time
2What is the SI unit of time?
The SI unit of time is the second (s).
3Which one has different dimensions from the others?
Length is [L]. The other three are all [T].
An equation that uses time
Equation checker
Matching dimensions are necessary, not sufficient. A check cannot see pure numbers such as 1/2 or 2π, so a consistent equation can still be wrong.
Read as
s = u t + (1/2) a t2s[L]=ut[L]+1/2 at2[L]Dimensionally consistentEvery term is [L]
t = timea = acceleration
Time: quick answers
What is the dimensional formula of time?
The dimensional formula of time is [T]. It is one of the seven SI base quantities.
What is the SI unit of time?
The SI unit of time is the second (s).
Which quantities have the same dimensions as time?
Time shares [T] with time period, time constant, Half-life. Equal dimensions do not make them the same quantity.