Options:
- A. Zero
- B. 2
- C. 1
- D. Not definite
View Answer
C. 1
Physics
Maximum number of components of a vector may be________________?
Options:
- A. 1
- B. 2
- C. 3
- D. Infinite
View Answer
D. Infinite
Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?
Options:
- A. B is anti-parallel to A
- B. B is a negative vector of A
- C. B has a negative magnitude
- D. B is perpendicular to A
View Answer
B. B is a negative vector of A
According to which one of following law the density of atom is uniform ?
Options:
- A. J.J.Thomson model
- B. Rutherfords model
- C. Bohrs model
- D. All of the above laws contradict the statement
View Answer
A. J.J.Thomson model
Radioactive decay obeys which one of the following law ?
Options:
- A. N=Noe-?t
- B. N=Noe?t
- C. N=Noe-?t/2
- D. No=N(1+e?t)
View Answer
A. N=Noe-?t
The unit of coefficient of linear expansion or volume expansion is__________?
Options:
- A. K
- B. K-1
- C. K -2
- D. none
View Answer
B. K-1
What is the angle of projection for which the range and maximum height become equal ?
Options:
- A. tan-1
- B. tan-1 4
- C. tan-1
- D. tan-1 2
View Answer
B. tan-1 4
When collision between the bodies in a system is inelastic in nature then for system ____________________?
Options:
- A. momentum changes but K.E remain conserve
- B. K.E changes but momentum remain conserve
- C. both momentum and K.E changes
- D. both momentum and K.E remain conserve
View Answer
B. K.E changes but momentum remain conserve
Ultrasonic have__________________?
Options:
- A. frequency in the audible range
- B. frequency is greater than 20 kHz
- C. frequency lower than 20 Hz
- D. all of above
View Answer
B. frequency is greater than 20 kHz
The normal ear is the most sensitive in the frequency range___________________?
Options:
- A. 20000 to 30000 hertz
- B. 10 to 20 hertz
- C. 2000 to 4000 hertz
- D. 6000 to 8000 hertz
View Answer
C. 2000 to 4000 hertz