Download App

Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance1 Mark
MCQ
Mark the correct options:
  • A
    A diode valve can be used as a rectifier.
  • B
    A triode valve can be used as a rectifier.
  • C
    A diode valve can be used as an amplifier.
  • D
    A triode valve can be used as an amplifier.
✓

Answer

  1. A diode valve can be used as a rectifier.

  2. A triode valve can be used as a rectifier.

  1. A triode valve can be used as an amplifier.

Explanation:

A diode valve and a triode valve allow current to flow only in one direction. Since a rectifier is a device that converts alternating current (bi-directional) into direct current (uni-directional), a diode valve and a triode valve can be used as rectifiers. A triode valve can control its output in proportion to the input signal. That is, it can act as an amplifier, whereas a diode valve cannot control its output in proportion to the input signal. So, it cannot be use as an amplifier.

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

Explore more

More "M.C.Q (1 Marks)" from Electrostatic Potential and Capacitance→Electrostatic Potential and Capacitance — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A radioactive nucleus emits a beta particle. The parent and daughter nuclei are

(a) Isotopes

(b) Isotones

(c) Isomers

(d) Isobars
→
If an object possesses an electric charge, it is said to be electrified or ... A ... When it has no charge, it is said to be ... B ... Here, A and B refer to:
→

A man standing in a swimming pool looks at a stone lying at the bottom. The depth of the swimming pool is h. At what distance from the surface of water is the image of the stone formed  (Line of vision is normal; Refractive index of water is n)

(a) h/n

(b) n/h

(c) h 

(d) hn

→
To reduce the reasonant frequency in an LCR series circuit with a generator:
→

The unit of mutual conductance of a triode valve is

(a) Siemen

(b) Ohm

(c) Ohm metre

(d) Joule Coulomb–1
→
Ten identical cells connected in series are needed to heat a wire of length one meter and radius ‘r’ by 10ºC in time ‘t’. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time ‘t’?
→
Mark out the correct options.
  1. The total charge of the universe is constant.
  2. The total positive charge of the universe is constant.
  3. The total negative charge of the universe is constant.
  4. The total number of charged particles in the universe is constant.
→

The ratio of intensities of two waves is 9 : 1. They are producing interference. The ratio of maximum and minimum intensities will be

(a) 10 : 8

(b) 9 : 1

(c) 4 : 1

(d) 2 : 1
→

Assertion  :   Torque on the coil is the maximum, when coil is suspended in a radial magnetic field.

Reason      : The torque tends to rotate the coil on its own axis.

(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.

→
An $\alpha$-particle captures an electron. What does it change to?
→