Options:
- A. 1
- B. -1
- C. +2
- D. -2
View Answer
A. 1
Physics
Prefix deca represents_______________?
Options:
- A. 10 Raised to power 1
- B. 10 Raised to power 2
- C. 10 Raised to power 3
- D. 10 Raised to power -1
View Answer
A. 10 Raised to power 1
Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?
Options:
- A. Chargeless
- B. Massless
- C. Highly penetrating
- D. All of above
View Answer
C. Highly penetrating
The error in measurement may occur due to_________________?
Options:
- A. The inexperience of a person
- B. The faulty apprentice
- C. Inappropriate method
- D. Due to all reasons in A, B and C
View Answer
D. Due to all reasons in A, B and C
Beta particles ionize an atom_________________?
Options:
- A. Due to the electrostatic force of attraction
- B. Due to the electrostatic force of repulsion
- C. Due to a direct collision
- D. Due to the gravitational force
View Answer
B. Due to the electrostatic force of repulsion
The uncertainty in a measurement may occur due to_______________?
Options:
- A. Limitation of an instrument
- B. Natural variation of the object to be measured
- C. Inadequate technique
- D. All given in A, B and C
View Answer
D. All given in A, B and C
Alpha particles possess greater penetration power than that of beta particles due to its_____________?
Options:
- A. Smaller ionization power
- B. Greater ionization power
- C. Neither greater nor smaller ionization power
- D. Same ionization power
View Answer
A. Smaller ionization power
Random errors can be reduced by_______________?
Options:
- A. Taking zero correction
- B. Comparing the instrument with another more accurate one
- C. Taking mean of several measurements
- D. All methods explained in A, B and C
View Answer
C. Taking mean of several measurements
Pair production cannot take place in a vacuum as ________________?
Options:
- A. Mass is not conserved
- B. Energy is not conserved
- C. Momentum is not conserved
- D. The chargee is not conserved
View Answer
C. Momentum is not conserved
In any measurement the significant figures are______________?
Options:
- A. All accurately known and all doubtful digits
- B. Only accurately known digits
- C. Only doubtful digits
- D. All accurately known digits and the first doubtful digit
View Answer
D. All accurately known digits and the first doubtful digit