MCQ
To reduce the value of capacitance of a parallel plate capacitor, the empty space between the plates:
  • A
    is filled with dielectric material
  • B
    by reducing, the area of the plates is increased
  • by increasing, the area of the plates is reduced
  • D
    also increases and also increases the area

Answer

Correct option: C.
by increasing, the area of the plates is reduced
(c)by increasing, the area of the plates is reduced

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If the threshold wavelength for sodium is 5420 Å, then the work function of sodium is

(a) 4.58 eV

(b) 2.28 eV

(c) 1.14 eV

(d) 0.23 eV

The maximum current that can be measured by a galvanometer of resistance 40 W is 10 mA. It is converted into a voltmeter that can read upto 50 V. The resistance to be connected in series with the galvanometer is ... (in ohm)

 

(a) 5040  

(b) 4960

(c) 2010  

(d) 4050

The atomic number and mass number for a specimen are Z and A respectively. The number of neutrons in the atom will be :
A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle:

A plane mirror reflecting a ray of incident light is rotated through an angle θ about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence, then

(a) The reflected ray rotates through an angle 2θ

(b) The incident ray is fixed

(c) The reflected ray does not rotate

(d) a, b

A rectangular loop with a sliding connector of length l = 1.0 m is situated in a uniform magnetic field B = 2T perpendicular to the plane of loop. Resistance of connector is r = 2W. Two resistance of 6W and 3W are connected as shown in figure. The external force required to keep the connector moving with a constant velocity v = 2m/s is

(a) 6 N

(b) 4 N

(c) 2 N

(d) 1 N

The network shown in the figure is a part of a complete circuit. If at a certain instant the current i is 5 A and is decreasing at the rate of   then   is

(a) 5 V

(b) 10 V

(c) 15 V

(d) 20 V

A parallel plate capacitor of area A, plate separation d and capacitance C is filled with three different dielectric materials having dielectric constants  and   as shown. If a single dielectric material is to be used to have the same capacitance C in this capacitor, then its dielectric constant k is given by

(a)  

(b)  

(c) k =  

(d)  

The following configuration of gate is equivalent to

(a) NAND

(b) XOR

(c) OR  

(d) None of these

Assertion   :   The quantity L/R possesses dimensions of time.

Reason       : To reduce the rate of increases of current through a solenoid should increase the time constant (L/R).

(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.