If F⃗ is the force acting on a particle having position vector r⃗ and ? ⃗ be the torque
If F⃗ is the force acting on a particle having position vector r⃗ and ? ⃗ be the torque of this force about the origin, then:
Options
(a) r⃗ . ? ⃗ > […]
AIPMT2009
A thin circular ring of mass M and radius R is rotating in a horizontal plane about
A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity ?. If two objects each of mass […]
A magnetic force acting on a charged particle of charge -2µC in a magnetic field of 2T
A magnetic force acting on a charged particle of charge -2µC in a magnetic field of 2T acting in y direction, when the particle velocity is (2i + 3j) x 10⁶ m/s, is
Options […]
If a magnetic substance is brought near the north or the south pole of a bar magnet
If a magnetic substance is brought near the north or the south pole of a bar magnet, it is:
Options
(a) repelled by the north pole and attracted by the south pole (b) […]
Which of the following oxides is not expected to react with sodium hydroxide
Which of the following oxides is not expected to react with sodium hydroxide
Options
(a) CaO (b) SiO₂ (c) BeO (d) B₂O₃
Correct Answer:
CaO
Explanation:
No explanation available. Be the first to […]
In the case of alkali metals, the covalent character decreases in the order
In the case of alkali metals, the covalent character decreases in the order
Options
(a) MF > MCl > MBr > MI (b) MF > MCl > MI > MBr (c) MI > […]
Which one of the following is employed as a tranquilizer
Which one of the following is employed as a tranquilizer
Options
(a) Naproxen (b) Tetracycline (c) Chlorpheninamine (d) Equanil
Correct Answer:
Equanil
Explanation:
No explanation available. Be the first to write the explanation […]
Which one of the elements with the following outer orbital configuration
Which one of the elements with the following outer orbital configuration may exhibit the largest number of oxidation states
Options
(a) 3d⁵4s¹ (b) 3d⁵4s² (c) 3d²4s² (d) 3d³4s²
Correct Answer:
3d⁵4s²
Explanation:
Greater […]
A bar magnet having a magnetic moment of 2 x 10⁴JT⁻¹ is free to rotate in a horizontal
A bar magnet having a magnetic moment of 2 x 10⁴JT⁻¹ is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 x 10⁻⁴T exists in the space. The work done […]
Which of the following reaction is an example of nucleophilic substitution
Which of the following reaction is an example of nucleophilic substitution reaction
Options
(a) 2RX + 2Na → R – R + NaX (b) RX + H₂ → RH + HX (c) RX […]