- Ain the direction of electric field
- Bzero
- Cin the direction, opposite to electric field
- Dperpendicular to electric field
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A light has amplitude A and angle between analyser and polariser is 60°. Light is reflected by analyser has amplitude
|
(a) A |
(b) A/ |
(c) |
(d) A/2 |
Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be
|
(a) More with 40 bulbs than with 39 |
(b) More with 39 bulbs than with 40 |
|
(c) Equal in both the cases |
(d) In the ratio of |
An electron and proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is
|
(a) Zero |
|
(b) Infinity |
|
(c) Equal to the kinetic energy of the proton |
|
(d) Greater than the kinetic energy of the proton |