81- Alpha ray are nuclear radiations. They are in fact same as:
A. Hydrogen
B. Deuterium
C. Tritium
D. Helium
View Answer
Answer : D. Helium
Description
82- When two bodies move towards each other with constant decreases at the rate of 6 m/sec, ___ they move in the same increases at the rate of 4 m/sec. calculate their velocities?
A. 5m/sec, 1 m/sec
B. 3 m/sec, 3 m/sec
C. 6 m/sec, 1 m/sec
D. 4 m/sec, 2 m/sec
View Answer
Answer : A. 5m/sec, 1 m/sec
Description
83- The magnetic field a produced in a solenoid depends on?
A. Its length
B. Its length and current in it
C. Its length and number of turns in it
D. The number of turns and current in it
View Answer
Answer : D. The number of turns and current in it
Description
84- Equation of continuity is expressed as:
A. A₁V₂ = A₂V₁
B. A₁V₁ = A₂V₂
C. A₁H₂=A₂H₁
D. A₁H₁=A₂H₂
View Answer
Answer : B. A₁V₁ = A₂V₂
Description
85- The path difference for the consecutive interference is:
A. (n-1)A
B. (n+2)A
C. nA/2
D. 2n/A
View Answer
Answer : A. (n-1)A
Description
86- The light exhibits the phenomena of constructive interference and time variation when it is ______ and ______.
A. Monochromatic and in phase
B. Monochromatic and out of phase
C. In phase and non-monochromatic
D. Out of phase and non-monochromatic
View Answer
Answer : A. Monochromatic and in phase
Description
87- The distance between two consecutive antinodes is equal to?
A. λ / 2
B. λ / 4
C. λ / 6
D. λ / 8
View Answer
Answer : A. λ / 2
Description
88- The charge on neutron is:
A. Zero
B. 1.6 × 10⁻²¹ C
C. 9.6 × 10⁻¹⁵ C
D. 9.11 × 10⁻¹⁹ C
View Answer
Answer : A. Zero
Description
89- When an applied stress changes the volume, the changes in volume are shown as:
