Identify the wrong statement in the following. Coulomb's law correctly describes the electric force that
|
(a) Binds the electrons of an atom to its nucleus |
|
(b) Binds the protons and neutrons in the nucleus of an atom |
|
(c) Binds atoms together to form molecules |
|
(d) Binds atoms and molecules together to form solids |
(b) Binds the protons and neutrons in the nucleus of an atom
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A player with 3 m long iron rod runs towards east with a speed of 30 km/hr. Horizontal component of earth's magnetic field is 4 
. If he is running with rod in horizontal and vertical positions, then the potential difference induced between the two ends of the rod in two cases will be
|
(a) Zero in vertical position and 1 |
|
(b) 1 |
|
(c) Zero in both cases |
|
(d) 1 |
Assertion : In a simple battery circuit the point of lowest potential is positive terminal of the battery
Reason : The current flows towards the point of the higher potential as it flows in such a circuit from the negative to the positive terminal.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A flat circular disc has a charge +Q uniformly distributed on the disc. A charge +q is thrown with kinetic energy E towards the disc along its normal axis. The charge q will
|
(a) Hit the disc at the centre |
|
(b) Return back along its path after touching the disc |
|
(c) Return back along its path without touching the disc |
|
(d) Any of the above three situations is possible depending on the magnitude of E |
In the Young’s double slit experiment with sodium light. The slits are 0.589 m a part. The angular separation of the third maximum from the central maximum will be (given 𝜆 = 589 mm)
|
(a) |
(b) |
(c) |
(d) |
Two metal spheres of capacitance 
and 
carry some charges. They are put in contact and then separated. The final charges 
and 
on them will satisfy
|
(a) |
(b) |
(c) |
(d) |
Lenz's law is consequence of the law of conservation of
|
(a) Charge |
(b) Momentum |
(c) Mass |
(d) Energy |
A point object O is placed on the principal axis of a convex lens of focal length 20 cm at a distance of 40 cm to the left of it. The diameter of the lens is 10 cm. If the eye is placed 60 cm to the right of the lens at a distance h below the principal axis, then the maximum value of h to see the image will be
|
(a) 0 |
(b) 5 cm |
(c) 2.5 cm |
(d) 10 cm |
A gate in which all the inputs must be low to get a high output is called
|
(a) A NAND gate |
(b) An inverter |
(c) A NOR gate |
(d) An AND gate |
$\frac{\text{W}}{2}$
$2^{\frac{1}{3}}$ W at the planet.
