Options:
- A. constantan
- B. nichrome
- C. copper
- D. tungsten
View Answer
D. tungsten
Physics
If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
Options:
- A. 3600C
- B. 7200C
- C. 1C
- D. 2C
View Answer
A. 3600C
Why should a resistance be introduced in a circuit in series deliberately ?
Options:
- A. to increase current
- B. to decrease current
- C. to control current
- D. just to give a good look to circuit
View Answer
B. to decrease current
Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
Options:
- A. One
- B. Two
- C. Four time
- D. None of these
View Answer
B. Two
All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?
Options:
- A. same current
- B. same current and potential difference
- C. different current but same potential difference
- D. different current and potential differences
View Answer
C. different current but same potential difference
The current through a metallic conductor is due to the motion of _________________?
Options:
- A. free electrons
- B. protons
- C. neutrons
- D. still under controversy
View Answer
A. free electrons
Resistance of a conductor depends upon_________________?
Options:
- A. nature of conductor
- B. dimension of conductor
- C. physical state of the conductor
- D. all of above
View Answer
D. all of above
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
Sound waves do not travel in vacuum because ___________________?
Options:
- A. they are transverse waves
- B. they are stationary waves
- C. they require material medium for propagation
- D. they do not have enough energy
View Answer
C. they require material medium for propagation
The velocity of sound is greatest in___________________?
Options:
- A. Water
- B. air
- C. copper
- D. ammonia
View Answer
C. copper