EE MCQ

SSC JE Electrical 2019 with solution SET-2
######
The names of the four materials have been given, select the one which has the least resistivity at 20°C?

The resistivity of iron at 20°C is 9.71 × 108

The resistivity of silver at 20°C is 1.59 × 108

The resistivity of Glass at 20°C is 1.10 × 109

The resistivity of nichrome at 20°C is 100 × 108

Hence silver is the least resistive material in the given option.

Related Question

SSC JE Electrical 2019 with solution SET-2
######
If the AC voltage and current are given by the following expressions?

v = 200sin (314t — 60°)

i = 50sin (720t), then what is the phase relation between them?

v = 200sin (314t — 60°)

i = 50sin (720t), then what is the phase relation between them?

When two alternating quantities of the same frequency have different zero points, they are said to have a phase difference. The angle between zero points is the angle of phase difference φ.

In the above-given question, the frequency of voltage and current is different so we can’t calculate the phase difference between them

SSC JE Electrical 2019 with solution SET-2
######
The 2’s complement of 1010101 is

The 2’s complement of the number (1010101)2 is found in two steps. First, convert the given number into its l’s complement.

1’s complement of a binary number is just an inversion of individual bits.

1’s complement of (1010101)2 is (0101010)2

To find 2’s complement of the number add one to the least significant bit (LSB). So

SSC JE Electrical 2019 with solution SET-2
######
Which of the following lamps is used s a sign or an indicator lamp?

Neon-lamp holders A lot of industrial electronic equipment uses neon lamps to indicate when they have been energized from the mains. If the lamp fails to glow, it means something is wrong with the supply circuit, the equipment, or the indicator itself. The neon lamps used are quite small and housed in holders 5 mm to 10 mm in diameter.

SSC JE Electrical 2019 with solution SET-2
######
Observe the given figure. Find Thevenin’s resistance as seen from open-circuited terminals?

To find the Thevenin’s resistance the current source is open-circuited and the voltage source is short-circuited.

SSC JE Electrical 2019 with solution SET-2
######
The work done on or by a unit N-pole in moving once around a closed path is equal to

**Ampere works law or Circuital Law**

This law relates to work done in a magnetic circuit i.e. closed magnetic flux path.

The work done on or by a unit N-pole in moving once round any complete path is equal to the product of current and number of turns enclosed by that path