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

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 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...

3. 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...

4. 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...

5. 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...

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

   A. use a very long and fine suspension B. use a coil of very large area C. use a coil with very large number of turns D. use a very strong magnetic field...

7. 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...

8. A galvanometer basically is an instrument used to ____________________?

   A. detect current in a circuit B. measure current flowing through a circuit C. measure voltage across a circuit D. measure potential difference between two points in a circuit...

9. The sensitivity of a galvanometer is given by__________________?

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

10. Galvanometer is a very sensitive device with______________________?

    A. very low damping B. very high damping C. no damping at all D. radial field disintegration...