Options:
- A. Directly proportional to extension
- B. Directly proportional to strain
- C. Directly proportional to square of amplitude
- D. Inversely proportional to extension
View Answer
A. Directly proportional to extension
Physics
A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?
Options:
- A. 2
- B. 5
- C. 0.5
- D. 0.2
View Answer
B. 5
Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?
Options:
- A. magnetic flux
- B. magnetic field intensity
- C. magnetic induction
- D. self inductance
View Answer
C. magnetic induction
A wheat stone bridge is said to be balanced when____________________?
Options:
- A. maximum current flows through the galvanometer branch
- B. minimum current flows through the galvanometer branch
- C. potential difference across galvanometer branch is maximum
- D. potential difference across galvanometer branch is zero
View Answer
D. potential difference across galvanometer branch is zero
The effective way to increase the sensitivity of a moving coil galvanometer is to___________________?
Options:
- A. use a very long and fine suspension
- B. use a coil of very large area
- C. use a coil with very large number of turns
- D. use a very strong magnetic field
View Answer
D. use a very strong magnetic field
A capacitor of capacitance 30
Options:
- A. 0.9sec
- B. 15 sec
- C. 1.5x105sec
- D. 0.9x102sec
View Answer
A. 0.9sec
An A.C series circuit containing 4? resistance and 3? inductive reactance. The impedance of the circuit is______________?
Options:
- A. 1?
- B. 5?
- C. 7?
- D. 7?
View Answer
B. 5?
Which one is not correct for a vector A= 2i+2j+3k ?
Options:
- A. Has direction 45
- B. Has magnitude 2
- C. Has magnitude 2 and direction
- D. Has magnitude -2
View Answer
D. Has magnitude -2
If A=B, which of the following is not correct ?
Options:
- A. A.B = A^ B^
- B. |A| = |B|
- C. |A^| = |B^|
- D. AB^ = BA^
View Answer
A. A.B = A^ B^
In the nucleus of uranium, the number of neutrons will be _____________?
Options:
- A. 92
- B. 235
- C. 143
- D. Different for different isotopes
View Answer
D. Different for different isotopes