When an electron beam passes between two plates, it can be seen that the electrons are deflected towards

  • no plate
  • negative plate
  • positive plate
  • none of above

For thermionic emission, the voltage applied should be of

  • 5 V
  • 7 V
  • 8 V
  • 6 V

To display heartbeats, waveforms and measuring voltages we use

  • cystoscope
  • gastro-scope
  • microscope
  • cathode-ray oscilloscope

Temperature, time, pressure and distance are

  • analogue quantities
  • digital quantities
  • negative quantities
  • positive quantities

An analog circuit which amplifies the signal without changing its shape to such an extent that it can operate a loudspeaker is called

  • grid
  • amplifier
  • woofer
  • switch

NOT gate is also called

  • multiplier
  • divider
  • inverter
  • converter

An alternating voltage varying between the maximum value of +5V and the minimum value of −5V is

  • digital signal
  • analogue signal
  • Wi-Fi signal
  • current signal

AND gate can be formed by using two

  • NOT gates
  • OR gate
  • NOR gates
  • NAND gates

The degree of deflection of electrons is directly proportional to

  • current
  • voltage
  • strength of electric field
  • resistance

At room temperature, the electron cannot escape metal surface due to

  • attractive forces of nucleus
  • repulsive forces of electrons
  • repulsive forces of nucleus
  • pulling force of protons

Electronic systems used at present consist of

  • both analogue and digital circuits
  • digital circuits
  • no circuits
  • analogue circuits

The circuit which implements the AND operation is known as

  • AND gate
  • OR gate
  • NAND gate
  • NOT gate

In C.R.O, the grid is connected to the

  • positive potential
  • negative potential
  • Alternating current (AC) source
  • Direct current (DC) source

The values of the output of the OR gate are always following the truth table of

  • AND operation
  • NAND operation
  • OR operation
  • NOT operation

The branch of electronics consisting of circuits which process analog quantities is called

  • digital electronics
  • analogue statistics
  • analogue electronics
  • analogue magnetics

The quantities whose values vary with time are

  • digital
  • scalar
  • analogue
  • vector

In OR operation if one of the inputs is '1' then output is

  • 0
  • 2
  • 4
  • 1

A boolean variable can have only two values which are

  • 0, 1
  • 1, 2
  • 1, 10
  • 0, 10

NOT gate performs the basic logical function called

  • conduction
  • diversion
  • inversion
  • conversion

If we apply a NOT gate at the output of OR gate then the result is

  • NOR gate
  • NAND gate
  • NOT gate
  • OR gate

A simply OR operation followed by a NOT operation is called

  • AND operation
  • NAND operation
  • NOR operation
  • OR operation

The electrons repel other electrons due to force

  • F = qE
  • F = ma
  • P = mv
  • S = vt

The electron gun consists of an electron source which is an electrically heated cathode that ejects

  • electrons
  • neutrons
  • protons
  • phontons

For OR operations switches should be connected in

  • series combination
  • series parallel combination
  • parallel combination
  • alternative combination

The OR operation can be represented as

  • X = A + B
  • X = A x B
  • X = A - B
  • X = AB

The cathode rays carry

  • positive charge
  • neutral
  • negative charge
  • positrons

A cathode ray oscilloscope consists of

  • The electron gun
  • The deflecting plates
  • A fluorescent screen
  • all of above

The particles emitted from hot cathode surface are

  • negative ions
  • positive ions
  • protons
  • electrons

NAND operation is simply AND operation followed by

  • OR
  • NOR
  • AND
  • NOT

When a HIGH level is applied to an inverter, on its output appears

  • LOW level
  • HIGH level
  • ZERO level
  • none of above
0 h : 0 m : 1 s

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