nikhil04
Noble Member
Joined: Aug 19, 2020
Last seen: Jan 13, 2022
Last seen: Jan 13, 2022
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Answer to: A charged particle having drift velocity of 7.5 × 10^–4 m s^–1 in an electric field of 3 × 10^–10 Vm^–1
Correct answer: (1) 2.5 × 106
5 years ago
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Answer to: The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is :
Correct answer: (1) 1 : 1
5 years ago
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Answer to: For transistor action, which of the following statements is correct?
Correct answer: (3) The base region must be very thin and lightly doped.
5 years ago
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Answer to: A resistance wire connected in the left gap of a metre bridge balances a 10Ω resistance
Correct answer: (1) 1.0 × 10–1 m
5 years ago
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Answer to: Find the torque about the origin when a force of 3j N acts on a particle whose position vector is 2km.
Correct answer: (2) -6i Nm
5 years ago
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Answer to: The capacitance of a parallel plate capacitor with air as medium is 6 μF. With the introduction of a dielectric medium
Correct answer: (2) 0.44 × 10–10 C2 N–1 m–2
5 years ago
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Answer to: The Brewsters angle ib for an interface should be
Correct option: (2) 45° < ib < 90°
5 years ago
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Answer to: The color code of a resistance is given below The values of resistance and tolerance, respectively, are
Correct answer: (3) 470 Ω, 5%
5 years ago
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Answer to: In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz.
Correct answer: (1) 524 Hz
5 years ago
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Answer to: The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly
Correct answer: (2) 0.06
5 years ago
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Answer to: Dimensions of stress are :
Correct answer: (3) [ML-1T-2]
5 years ago
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Answer to: A short electric dipole has a dipole moment of 16 × 10^-9 C m. The electric potential due to the dipole at a point at a distance of 0.6 m
Correct answer: (1) 200 V
5 years ago
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Answer to: The mean free path for a gas, with molecular diameter d and number density n can be expressed as :
Correct answer: (1) 1/√2nπd2
5 years ago
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Answer to: Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string.
Correct answer: (2) g/5
5 years ago
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Answer to: The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5 r2 ) through 1 K
Correct option: (4) 27/8
5 years ago
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Answer to: An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m^–1.
Correct option: (4) 2.4π × 10–4 T m A–1
5 years ago
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Answer to: The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
Correct option: (4) π rad
5 years ago
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Answer to: The increase in the width of the depletion region in a p-n junction diode is due to :
Correct answer: (1) reverse bias only
5 years ago
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Answer to: When a uranium isotope 235^92U is bombarded with a neutron, it generates 89^36Kr, three neutrons and :
Correct answer: (4) 14456Ba
5 years ago
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Answer to: A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C.
Correct answer: (1) 0.2 kg/m3
5 years ago
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