A body has 80 microcoulomb of charge. Number of additional electrons in it will be
A body has 80 microcoulomb of charge. Number of additional electrons in it will be
Options
(a) 8 x 10⁵ (b) 80 x 10¹⁷ (c) 5 x 10¹⁴ (d) 1.28 x 10¹⁷
Correct […]
Questions
A tyre filled with air (27° C and 2 atm) bursts. The temperature of air is (ˠ=1.5)
A tyre filled with air (27° C and 2 atm) bursts. The temperature of air is (ˠ=1.5)
Options
(a) -33° C (b) 0° C (c) 27° C (d) 240° C
Correct Answer:
-33° […]
The transverse nature of electromagnetic waves is proved by which of the following?
The transverse nature of electromagnetic waves is proved by which of the following?
Options
(a) Interference phenomena (b) Diffraction phenomena (c) Dispersion phenomena (d) Polarisation phenomena
Correct Answer:
Polarisation phenomena
Explanation:
No explanation […]
If the value of potential in an A.C circuit is 10 V, the peak value of potential is
If the value of potential in an A.C circuit is 10 V, the peak value of potential is
Options
(a) 10 / √2 V (b) 20 / √2 V (c) 10 √2 V […]
If ₉₂U²³⁸ undergoes successively 8 ∝-decays and 6 β-decays, the resulting nucleus is
If ₉₂U²³⁸ undergoes successively 8 ∝-decays and 6 β-decays, the resulting nucleus is
Options
(a) ₉₂U²⁰⁸ (b) ₉₂Pb²⁰⁶ (c) ₉₂U²¹⁰ (d) ₉₂U²¹⁴
Correct Answer:
₉₂Pb²⁰⁶
Explanation:
No explanation available. Be the first to […]
The energy released in the fission of 1 kg of ₉₂U²³⁵ is (energy per fission = 200 MeV)
The energy released in the fission of 1 kg of ₉₂U²³⁵ is (energy per fission = 200 MeV)
Options
(a) 5.1 x 10²⁶ eV (b) 5.1 x 10²⁶ J (c) 8.2 x 10¹³ […]
Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A
Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A is
Options
(a) 0.8 J (b) 0.08 J (c) 8 J (d) 80 J
Correct Answer: […]
A particle falls towards earth from infinity. Its velocity on reaching the earth
A particle falls towards earth from infinity. Its velocity on reaching the earth would be
Options
(a) infinity (b) √(2gR) (c) 2 √(Rg) (d) zero
Correct Answer:
√(2gR)
Explanation:
No explanation available. Be […]
The potential energy of a weightless spring compressed by a distance D is proportional
The potential energy of a weightless spring compressed by a distance D is proportional to
Options
(a) D (b) D⁰ (c) D² (d) D⁻²
Correct Answer:
D⁻²
Explanation:
No explanation available. Be the […]
The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth
The innermost orbit of hydrogen atom has a diameter 1.06Å. The diameter of tenth orbit is
Options
(a) 5.3 Å (b) 10.6 Å (c) 53 Å (d) 106 Å
Correct Answer:
106 Å