The angle between the dipole moment and electric field at any point on the equatorial plane is
Options
(a) 180° (b) 0° (c) 45° (d) 90°
Correct Answer:
180°
Explanation:
No explanation available. […]
The input characteristics of a transistor in CE mode is the graph obtained by plotting
Options
(a) Iв against Iс at constant Vсᴇ (b) Iв against Vвᴇ at constant Vсᴇ (c) Iв against […]
Four identical cells of emf Ԑ and internal resistance r are to be connected in series.Suppose, if one of the cell is connected wrongly, then the equivalent emf and effective internal resistance of the combination […]
What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (take, hc=1240 eV-nm)
Options
(a) 122 nm (b) 82 nm (c) 150 nm […]
The average power dissipated in a pure inductor is
Options
(a) VI²/4 (b) 1/2 VI (c) zero (d) VI²
Correct Answer:
zero
Explanation:
In the inductor circuit, phase difference (ɸ) = 90° or π […]
A nucleus at rest splits into two nuclear parts having radii in the ratio 1:2. Their velocities are in the ratio
Options
(a) (4:1) (b) (8:1) (c) (2:1) (d) (6:1)
Correct Answer:
(8:1)
An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then, the wavelength of the emitted light is
Options
(a) 6.5×10⁻⁷ m (b) […]
The polarising angle of glass is 57⁰. A ray of light which is incident at this angle will have an angle of refraction as
Options
(a) 43⁰ (b) 25⁰ (c) 38⁰ (d) 33⁰
Correct […]
Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing through them when a potential difference is applied across its ends will be
Options
(a) (5:4:3) (b) (6:3:2) […]
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