MCQ
A capacitor acts as an infinite resistance for:
- ADC.
- BAC.
- CDC as well as AC.
- DNeither AC nor DC.
✓
Answer
- DC.
Explanation:
$\text{X}_\text{C}\frac{1}{\omega\text{C}}=\frac{1}{0\times\text{C}}$ $\bigg\{\text{in}\stackrel{{\text{DC}}}{{\omega = 0 }}\bigg\}$
$=\infty$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An X-ray tube is operating at 50 kV and 20 mA. The target material of the tube has a mass of 1.0 kg and specific heat 495 J kg-1 
. One percent of the supplied electric power is converted into X-rays and the entire remaining energy goes into heating the target. Then
|
(a) A suitable target material must have a high melting temperature |
|
(b) The average rate of rise of temperature of target would be 2 °C/s |
|
(c) The minimum wavelength of the X-rays emitted is about 0.25 |
|
(d) a, b, c |
A mass m = 20 g has a charge q = 30 mC. It moves with a velocity of 20 m/s and enters a region of electric field of 80 N/C in the same direction as the velocity of the mass. The velocity of the mass after 3 seconds in this region is
|
(a) 80 m/s |
(b) 56 m/s |
(c) 44 m/s |
(d) 40 m/s |
An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is true?
Two electric lamps of 40 watt each are connected in parallel. The power consumed by the combination will be
|
(a) 20 watt |
(b) 60 watt
|
(c) 80 watt |
(d) 100 watt |
In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled
|
(a) x |
(b) x/4 |
(c) 4x |
(d) 2x |
A cell is connected between two points of a uniformly thick circular conductor. The magnetic field at the centre of the loop will be (Here 
and 
are the currents flowing in the two parts of the circular conductor of radius ‘a’ and 
has the usual meaning)
|
(a) Zero |
(b) |
(c) |
(d) |
If the de Broglie wavelength of a proton is 10−13m, the electric potential through which it must have been accelerated is:
The electric field and the electric potential at a point are E and V respectively.
Three capacitors whose capacitances are 2,4 and $\chi_\mu F$ respectively. They are combine first in series and then in parallel. In both the cases the ratio of their equivalents will be :
→In the half-wave rectifier circuit shown. Which one of the following wave forms is true for 
, the output across C and D ?
(a)
|
(b)
|
(c)
|
(d)
|