The effective way to increase the sensitivity of a moving coil galvanometer is to___________________?

Related Mcqs:

1. Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always___________________?

   A. BINA cosa
   B. BINA sina
   C. BINA tana
   D. BINA

2. A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?

   A. 4 volt
   B. 5 volt
   C. 2 volt
   D. 0.4 volt

3. A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?

   A. 2.0 mA
   B. 20 mA
   C. 200 mA
   D. 0.2 mA

4. The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12Ω. Galvanometer resistance is_____________?

   A. 18Ω
   B. 30Ω
   C. 24Ω
   D. 12Ω

5. An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ?

   A. 10mH
   B. 12mH
   C. 16mH
   D. 20mH

6. The sensitivity of a galvanometer is given by__________________?

   A. C/BAN
   B. CAN/B
   C. BAN/C
   D. ABC/N

7. When the coil of the galvanometer is in equilibrium then the deflecting couple is____________________?

   A. zero
   B. equal to the restoring couple
   C. greater than the restoring couple
   D. smaller than the restoring couple

8. n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?

   IA. V = VR+VL+VC
   B. V2 = VR2+VL2+VC2
   C. V2 = VR2+(VL-VC)2
   D. V2 = VL2+(VR-VC)2

9. If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?

   A. τ = NIAB cosφ
   B. τ = NIAB sinφ
   C. τ = NIAB tanφ
   D. τ = NIAB

10. Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?

    A. 2.5
    B. 2.0
    C. 1.75
    D. 1.5
    E. 1.25

    Submitted by: Mansoor Ul Haque