DFCCIL 2021, DFCCIL 2021. DFCCIL ELECTRICAL QUIZ, DFCCIL EXAM DATES, DFCCIL ELECTRICAL EXECUTIVE |_00.1
Engineering Jobs   »   Electrical Engineering quizs   »   DFCCIL 2021, DFCCIL 2021. DFCCIL ELECTRICAL...

DFCCIL’21 EE: Daily Practice Quiz. 09-September-2021

DFCCIL Recruitment 2021 –Dedicated Freight Corridor Corporation of India Limited (DFCCIL) Public Sector Undertaking under the administrative control of the Government of India (Ministry of Railways).DFCCIL has released the official notification for the recruitment of 1074 vacancies for the recruitment of Junior Executives, Executives, and Junior Managers through their official website, i.e. dfccil.com.

EXAM DATES: 26 SEPT TO 30 SEPT

               DFCCIL’21 EE: Daily Practices Quiz 09-Sep-2021

Each question carries 1 mark.
Negative marking: 1/4 mark
Total Questions: 06
Time: 08 min.

Q1. The ratio of the mobility to the diffusion coefficient in a semi-conductor has the unit of:
(a) V×s
(b) cm×V^(-1)
(c) V×cm^(-1)
(d) V^(-1)

Q2. A tunnel diode is
(a) An amplifying device
(b) High resistivity p-n junction diode
(c) A very heavily doped p-n junction diode
(d) A slow switching device

Q3. A silicon PN junction is forward biased with a constant current at room temperature. When the temperature is increased by 10⁰C, the forward bias voltage across the PN junction:
(a) Increases by 25 mV
(b) Decreases by 25 mV
(c) Increases by 60 mV
(d) Decreases by 60 mV

Q4. In PMMC instruments, damping torque is provided by:
(a) Eddy currents
(b) Air friction
(c) Fluid friction
(d) Thermal effect

Q5. In 3-phase induction motor the mechanical power developed in terms of air-gap power(P_ag) is:
(a) (1-s) Pag
(b) (s-1) Pag
(c) Pag/((1-s))
(d) Pag/s

Q6. Determine the current through the 5Ω resistor in the figure given below utilizing Thevenin’s theorem.

DFCCIL 2021, DFCCIL 2021. DFCCIL ELECTRICAL QUIZ, DFCCIL EXAM DATES, DFCCIL ELECTRICAL EXECUTIVE |_40.1

(a) 2A
(b) 3A
(c) 0A
(d) 1A

SOLUTIONS
S1. Ans.(d)
Sol. Relation between diffusion constant(D) and mobility(µ): D α µ ⇒D=V_Tµ
Where; V_T= thermal voltage
∵ µ/D=1/VT
Unit: V^(-1)

S2. Ans.(c)
Sol. A tunnel diode is a very heavily doped p-n junction diode which is used as very high-speed switching device.

S3. Ans.(b)
Sol. dV/dT=-2.5 mV/⁰C
For 10⁰C increased temperature, voltage across PN junction will decrease by 25 mV.

S4. Ans.(a)
Sol. In PMMC instruments, damping torque is provided by eddy currents.

S5. Ans.(a)
Sol. For 3-phase induction motor: P_mech=(1-s) P_ag

DFCCIL 2021, DFCCIL 2021. DFCCIL ELECTRICAL QUIZ, DFCCIL EXAM DATES, DFCCIL ELECTRICAL EXECUTIVE |_50.1

Sharing is caring!

×

Download success!

Thanks for downloading the guide. For similar guides, free study material, quizzes, videos and job alerts you can download the Adda247 app from play store.

Thank You, Your details have been submitted we will get back to you.

Was this page helpful?

Leave a comment

Your email address will not be published. Required fields are marked *

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Login

OR

Forgot Password?

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Sign Up

OR
Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Forgot Password

Enter the email address associated with your account, and we'll email you an OTP to verify it's you.


Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to
/6


Did not recive OTP?

Resend in 60s

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Change Password



Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Almost there

Please enter your phone no. to proceed
+91

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to Edit Number


Did not recive OTP?

Resend 60

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?