Which one of the following material is most suitable for making core of an electromagnet ?

Related Mcqs:

1. Which one is the best material for making connecting wires ?

   A. iron
   B. tungsten
   C. silver
   D. copper

2. A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________?

   A. Stress/strain
   B. (stress/strain)
   C. Stress x strain
   D. (Stress / strain)

3. In multimode step index fibre the refractive index of core and cladding is____________?

   A. same
   B. different
   C. zero
   D. different with refractive index of core higher than cladding

4. The core of a transformer is laminated to reduce energy losses due to__________?

   A. Eddy currents
   B. Hysteresis
   C. Resistance in winding
   D. None of these

   Submitted by: Tauseef Ali

5. Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?

   A. α-rays
   B. β-rays
   C. γ-rays
   D. X-rays

6. Which one of the following materials is useful for making bulb filaments ?

   A. constantan
   B. nichrome
   C. copper
   D. tungsten

7. If a vector Ā is making an angle “∅” with positive y-axis then which of the following is correct.?

   A. Ax= ACos∅
   B. Ay= ASin∅
   C. Ay= ACos∅
   D. None

   Submitted by: Zahid Jagirani

8. Geiger counter is suitable for _________________?

   A. Fast counting
   B. Extremely fast counting
   C. Slow counting
   D. All situations

9. The most suitable unit for expressing nuclear radius is_______?

   A. Angstrom
   B. Micro
   C. Nano meter
   D. Fermi

   Submitted by: Malik Asghar Hussain

10. Which instrument is suitable to measure the internal diameter of a test tube?

    A. Vernier Callipers
    B. Screw Gauge
    C. Bore Gauge
    D. None

    Submitted by: Warraich