NEET Physics: Questions 1077 - 1079 of 2099
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Question number: 1077
A 10 ohm resistance, 5 mH inductance coil and 10 µF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency
Question number: 1078
Choke coil is preferred over a resistor to adjust current in an ac circuit.
Power factor for inductance is zero.
|a.||Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ|
|b.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|
|c.||Both Ꭺ and Ꭱ are false|
|d.||Ꭺ is false but Ꭱ is true|
Question number: 1079
A ray of monochromatic light is incident on the plane surface of separation between two media x and y with angle of incidence i in the medium x and angle of refraction r in the medium y. The graph shows the relation between sin i and sin r.
(1) The speed of light in the medium y is times than in medium x
(2) The speed of light in the medium y is times than in medium x.
(3) The total internal reflection can take place when the incidence is in x.
(4) The total internal reflection can take place when the incidence is in y
Select the correct answers and mark it according to the following codes:
1, 2 and 3 are correct
1 and 2 are correct
1 and 3 are correct
2 and 4 are correct