n instrument which can measure potential without drawing any current is_____________________?

Related Mcqs:

1. The instrument used to measure blood pressure is called____________?

   A. Venturimeter
   B. Blood pressure
   C. Sphygmomanometer
   D. Sonometer

2. 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

3. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

   A. Same
   B. Different
   C. At L will be more than at C
   D. At L will be less than at C

4. 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

5. A capacitor of capacitance 30µF is charged by a constant current of 10mA. If initially, the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V ?

   A. 0.9sec
   B. 15 sec
   C. 1.5x105sec
   D. 0.9x102sec

6. 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

7. An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?

   A. I = 2I∫Sin(πt/2)
   B. I = 2I∫Sin(2πt)
   C. I = 2ISinπt
   D. I = I∫sin(2πt)

8. Which one of the following is not an electromechanical instrument ?

   A. galvanometer
   B. voltmeter
   C. ammeter
   D. AC transformer and DC generator

9. 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

10. Slope of velocity time graph is_____________________?

    A. acceleration
    B. distance
    C. force
    D. momentum