$0$
$\delta$
$2\delta$
$3\delta$
Explanation:
In combination (refractive angles of prisms reversed with respect to each other), the deviations through two prisms cancel out each other and the net deviation is due to the third prism only.
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A galvanometer can be converted into an ammeter by connecting
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(a) Low resistance in series |
(b) High resistance in parallel |
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(c) Low resistance in parallel |
(d) High resistance in series |
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An electric dipole is situated in an electric field of uniform intensity E whose dipole moment is p and moment of inertia is I. If the dipole is displaced slightly from the equilibrium position, then the angular frequency of its oscillations is
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(a) |
(b) |
(c) |
(d) |
A fully charged capacitor has a capacitance ‘C’. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity ‘s’ and mass ‘m’. If the temperature of the block is raised by ‘ ∆T ’, the potential difference ‘V’ across the capacitance is
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(a) |
(b) |
(c) |
(d) |
An electric field of 1500 V / m and a magnetic field of 0.40 weber / meter2 act on a moving electron. The minimum uniform speed along a straight line the electron could have is
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(a) 1.6 × 1015 m / s |
(b) 6 × 10-16 m / s |
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(c) 2 : 1 |
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