What is the equivalent resistance between A and B
|
(a) |
(b) |
(c) |
(d) 2R |
What is the equivalent resistance between A and B
|
(a) |
(b) |
(c) |
(d) 2R |
(c)
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In a vibration magnetometer, the time period of a bar magnet oscillating in horizontal component of earth's magnetic field is 2 sec. When a magnet is brought near and parallel to it, the time period reduces to 1 sec. The ratio H/F of the horizontal component H and the field F due to magnet will be
| (a) 3 | (b) 1/3 |
(c) |
(d) 1/ |
Below figures (1) and (2) represent lines of force. Which is correct statement
|
(a) Figure (1) represents magnetic lines of force |
|
(b) Figure (2) represents magnetic lines of force |
|
(c) Figure (1) represents electric lines of force |
|
(d) Both figure (1) and figure (2) represent magnetic lines of force |
The work done in bringing a 20 coulomb charge from point A to point B for distance 0.2m is 2J. The potential difference between the two points will be (in volt)
|
(a) 0.2 |
(b) 8 |
(c) 0.1 |
(d) 0.4 |
A semiconductor dopped with a donor impurity is
|
(a) P-type |
(b) N-type |
(c) NPN type |
(d) PNP type |
In a nuclear reaction, which of the following is conserved
|
(a) Atomic number |
|
(b) Mass number |
|
(c) Atomic number, mass number and energy |
|
(d) None of these |