- ADC
- BAC
- CDC as well as AC
- Dneither AC nor DC
Explanation:
Capacitors contain at least two electrical conductors separated by a dielectric/ insulator and is used to store energy electrostatically between the conductors. It acts like an open circuit and hence acts like an infinite resistance for DC currents.
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A convex lens forms a real image of an object for its two different positions on a screen. If height of the image in both the cases be 8 cm and 2 cm, then height of the object is
|
(a) 16 cm |
(b) 8 cm |
(c) 4 cm |
(d) 2 cm |
The resistance of a heater coil is 110 ohm. A resistance R is connected in parallel with it and the combination is joined in series with a resistance of 11 ohm to a 220 volt main line. The heater operates with a power of 110 watt. The value of R in ohm is
|
(a) 12.22 |
(b) 24.42 |
|
(c) Negative |
(d) That the given values are not correct |
Assertion : In Young’s experiment, the fringe width for dark fringes is different from that for white fringes.
Reason : In Young’s double slit experiment the fringes are performed with a source of white light, then only black and bright fringes are observed.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
The example for non-ohmic resistance is
|
(a) Copper wire |
(b) Carbon resistance |
(c) Diode |
(d) Tungston wire |
