Options:
- A. Constant
- B. not constant
- C. constant if the rate of ejected gases is constant
- D. constant for short range rocket.
View Answer
A. Constant
Physics
When the source of sound moves away form a stationary listener then ______________ occurs?
Options:
- A. an apparent increase in frequency
- B. an apparent decrease in frequency
- C. an apparent decrease in wavelength
- D. no apparent change in frequency
View Answer
B. an apparent decrease in frequency
Doppler effect applies to____________________?
Options:
- A. sound wave only
- B. light wave only
- C. both sound and light waves
- D. neither sound nor light wave
View Answer
C. both sound and light waves
Circuit which gives continuously varying potential is called _______________________?
Options:
- A. complex network
- B. wheat stone bridge
- C. potential divider
- D. all of above
View Answer
C. potential divider
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?
Options:
- A. 40 W bulb
- B. 60 W blub
- C. 100 W blub
- D. all will burn equally brightly
View Answer
A. 40 W bulb
Which one of the following is nearly monochromatic light ?
Options:
- A. light form fluorescent tube
- B. light form neon lamp
- C. light form sodium lamp
- D. light form simple lamp
View Answer
C. light form sodium lamp
According to Einstein light travels form one place to another in the form of ________________?
Options:
- A. waves
- B. particles
- C. photons
- D. it was not his discovery
View Answer
C. photons
The average power and instantaneous power become equal if work is done at __________________?
Options:
- A. any rate
- B. at variable rate
- C. at uniform rate
- D. at high rate
View Answer
C. at uniform rate
Which branch of science plays an important role in engineering?
Options:
- A. Biology
- B. Chemistry
- C. Physics
- D. All of these
View Answer
C. Physics
Area under velocity time graph represent_____________________?
Options:
- A. force
- B. displacement
- C. distance
- D. acceleration
View Answer
B. displacement