NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Units and Dimensions
NEET · Physics · Units and Dimensions
Assertion (A): Special functions such as trigonometric, logarithmic...
Assertion (A): Special functions such as trigonometric, logarithmic and exponential functions are not dimensionless.
Reason (R): A pure number, ratio of similar physical quantities, such as angle and refractive index, has no dimensions.
Options
- AAssertion (A) is true, Reason (R) is true; Reason (R) is a correct explanation for Assertion (A).
- BAssertion (A) is true, Reason (R) is true; Reason (R) is not a correct explanation for Assertion (A).
- CAssertion (A) is true, Reason (R) is false.
- DAssertion (A) is false, Reason (R) is true.
Correct answer
D. Assertion (A) is false, Reason (R) is true.
Step-by-step solution
The arguments of special functions, such as the trigonometric, logarithmic and exponential functions must be dimensionless.
A pure number, ratio of similar physical quantities, such as angle as the ratio (length/length), refractive index as the ratio of (speed of light in vacuum/speed of light in medium), etc. has no dimensions.