NEPALI ARMY SCHOOL OF EME POLYTECHNIC
Unit Test-1
Diploma in Mechanical Engineering
YEAR:- IInd
SEMSTER: 3rd
Subject: EG 2102 ME Electrical Technology
FM:-20
Time: 1 Hrs
PM:- 8
Attempt all questions
1. State and Explain the Ohm’s law. Also explain the limitations of Ohm’s law ? (2+2)
2. A coil of relay is made of copper wire. At a temperature of 20˚C, the resistance of the coil
is 400Ω. Calculate the resistance of the coil at temperature of 80 ˚C. The temperature
coefficient of copper is 0.0038 at 0 ˚C. (4)
3. State kirchoff’s voltage law. Derive the necessary relations with its application assuming
a suitable circuit. (1+3)
4. Find the value of R, so that I=1.5A in the circuit below.(4)
I = 1.5
A
5. Find the value of voltage drop across resistance R1 in the following circuit.
16 A
V=?
10 A
4A