A wheat stone bridge is said to be balanced when____________________? A. maximum current flows through the galvanometer branch B. minimum current flows through the galvanometer branch C. potential difference across galvanometer branch is maximumD. potential difference across galvanometer branch is…

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

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 tanaD. BINA

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

In a multi range ammeter as the range increases _____________________? A. shunt value decreases B. shunt value increases C. shunt value remains the same D. none of the above

Which one of the following is not an electromechanical instrument ? A. galvanometer B. voltmeter C. ammeterD. AC transformer and DC generator

When the coil of the galvanometer is in equilibrium then the deflecting couple is____________________? A. zeroB. equal to the restoring couple C. greater than the restoring couple D. smaller than the restoring couple

n instrument which can measure potential without drawing any current is_____________________? AA. voltmeter B. galvanometerC. cathode ray oscilloscope (CRO) D. ammeter

An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________? A. E = BeV B. B = eE/VC. E = BV D. E = BeV/2

The standard vector symbol for flux density is ____________________? A. MB. L C. H D. B