Options:
- A. more heat is produced in thick wire
- B. more heat is produced in thin wire
- C. no heat is produced in wire
- D. less heat is produced in thick wire
View Answer
B. more heat is produced in thin wire
Physics
Optical active crystals rotates the __________________?
Options:
- A. vibrating plane
- B. polarization plane
- C. diffraction plane
- D. interference plane
View Answer
B. polarization plane
In double slit experiment if one of the two slit is covered then________________?
Options:
- A. no interference fringes are observed
- B. no diffraction fringes are observed
- C. no fringes observed
- D. interference pattern not disturbed
View Answer
A. no interference fringes are observed
Diffraction fringes are____________________?
Options:
- A. equally spaced
- B. distance between them increases
- C. distance between then decreases
- D. they are adjacent with no space in between
View Answer
C. distance between then decreases
The formula of inter-conversion of centigrade and Fahrenheit scale is___________?
Options:
- A. c-32/9
- B. f -32/9 =c/5
- C. f-32/9=c/9
- D. none
View Answer
B. f -32/9 =c/5
Which shows the correct relation between time of flight T and maximum height H ?
Options:
- A. H=gT2/8
- B. H=8T2/g
- C. H=8g/T2
- D. H=gT2
View Answer
A. H=gT2/8
Motorcycle safety helmet extends the time of collision hence decreasing the________________?
Options:
- A. chance of collision
- B. force acting
- C. velocity
- D. impulse
View Answer
D. impulse
Velocity of sound in vacuum is ____________________?
Options:
- A. 332 ms-1
- B. 320 ms-1
- C. Zero
- D. 224 ms-1
View Answer
C. Zero
Increase in velocity of sound in the air for 1
Options:
- A. 1.61 ms-1
- B. 61.0 ms-1
- C. 0.61 ms-1
- D. 2.00 ms-1
View Answer
C. 0.61 ms-1
Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?
Options:
- A. 40 W
- B. 90W
- C. 100W
- D. 120W
View Answer
B. 90W