UP polytechnic Lecturer (EE) Paper-2 Quiz 48

Consider the following statements related to Hall effect:

1. Hall effect is used to determine whether a semiconductor is n -type or p-type.

2. To find the carrier concentration.

3. Measuring the conductivity (σ), the mobility (μ) can be calculated.

4. The Hall effect has been incorporated into a magnetic field meter.

Which of the above statements are correct?

In series type ohmmeter, full scale deflection current indicator is marked.

The primary and secondary windings of a transformer are wound on the top of each other in order to reduce ___?

The software that transfers the object program from secondary memory to the main memory is called:-

What is the total electric flux through the surface of a sphere that has a radius of 1 m and carries a charge of 1 μC at its centre? Coulomb constant is given by ∈₀ is the permittivity of free space.

Ratio of total power to the carrier power is _____, provide modulation index is 0.8.

The number of memory chips of size 2 kB required to build a memory bank of size 128 K × 4 bits is

Given the following k-map, which of the following represents the minimal sum of products of the k-map.

Consider the following statements regarding microprocessor base relay’s, select correct statements

1. it has less burden

2. it is faster in operation

3. it has less installation as well as maintenance cost

Consider the problem of relay co-ordination for the distance relays R1 and R2 on adjacent lines of a transmission system (the following figure). The Zone 1 and Zone 2 settings for both the relays are indicated on the diagram. Which of the following indicates the correct time setting for the Zone 2 of relays R1 and R2.