Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes to increase its internal energy will be
Options
(a) 5 / 7 (b) 3 / 5 (c) […]
Questions
Two masses of 9 g and 6 g are connected with a string which is passing over a frictionless
Two masses of 9 g and 6 g are connected with a string which is passing over a frictionless pulley. Then common acceleration is
Options
(a) 1.96 cm/sec² (b) 48 cm /sec² (c) […]
If a body travels half the distance with velocity v1 and the next half with velocity v2
If a body travels half the distance with velocity v1 and the next half with velocity v2, its average velocity will be given by
Options
(a) v=√(v1 x v2) (b) v= (v1 + […]
Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by
Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by emitting an alpha particle. After the decay it becomes
Options
(a) ²³²U (b) ²³²Pa (c) ²³⁰Th (d) ²³⁰Ra
Correct […]
The total energy of an electron in the first excited state of hydrogen atom
The total energy of an electron in the first excited state of hydrogen atom is about -3.4 eV. Its kinetic energy in this state is
Options
(a) 3.4 eV (b) 6.8 eV (c) -3.4 […]
If alternating source of primary coil on transformer is replaced by a Laclanche cell
If alternating source of primary coil on transformer is replaced by a Laclanche cell, the induced e.m.f in secondary coil will be
Options
(a) zero (b) unity (c) more (d) less
Correct Answer: […]
A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas
A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas at 27° C is V, then volume at 327° C is
Options
(a) V […]
In a circuit, 5% of total current passes through a galvanometer. If resistance
In a circuit, 5% of total current passes through a galvanometer. If resistance of the galvanometer is G, the value of the shunt is
Options
(a) 19 G (b) 20 G (c) G […]
A point source is kept at a distnace 1000m has an illumination I. To change the illumination
A point source is kept at a distnace 1000m has an illumination I. To change the illumination to 16I, the new distance should become
Options
(a) 250 m (b) 500 m (c) 750 […]
The excess pressure inside one soap bubble is three times that inside a second soap bubble
The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface area is
Options
(a) 1 : 9 (b) 1 : 3 […]