- ADirectly proportional to its mass number.
- BInversely proportional to its atomic weight.
- CDirectly proportional to the cube root of its mass number.
- DNone of these.
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A bar magnet of length 10 cm and having the pole strength equal to 10–3 weber is kept in a magnetic field having magnetic induction (B) equal to
Tesla. It makes an angle of 30o with the direction of magnetic induction. The value of the torque acting on the magnet is
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|
(a) 2π |
(b) 2 π |
(c) 0.5 N |
(d) 0.5 |
In the figure a carbon resistor has bands of different colours on its body as mentioned in the figure. The value of the resistance is

|
(a) 2.2 k W |
(b) 3.3 k W |
(c) 5.6 k W |
(d) 9.1 k W |
“On flowing current in a conducting wire the magnetic field produces around it.” It is a law of
|
(a) Lenz |
(b) Ampere |
(c) Ohm |
(d) Maxwell |
Find VAB

|
(a) 10 V |
(b) 20 V |
(c) 30 V |
(d) None of these |
According to the Rutherford’s atomic model, the electrons inside the atom are
|
(a) Stationary |
(b) Not stationary |
(c) Centralized |
(d) None of these |
A radioactive substance has an average life of 5 hours. In a time of 5 hours
|
(a) Half of the active nuclei decay |
(b) Less than half of the active nuclei decay |
|
(c) More than half of the active nuclei decay |
(d) All active nuclei decay |
Given below are four logic gate symbol (figure). Those for OR, NOR and NAND are respectively

|
(a) 1, 4, 3 |
(b) 4, 1, 2 |
(c) 1, 3, 4 |
(d) 4, 2, 1 |