Quiz on Moving Coil Galvanometer

What is a device used to measure electric currents even as low as a few microamperes?

• Ohmmeter

• Galvanometer

• Ammeter

• Voltmeter

What is the principle behind the deflection of a moving coil galvanometer?

• Electric torque

• Magnetic torque

• Frictional torque

• Gravitational torque

What is used to suspend the coil in a moving coil galvanometer?

• Phosphor-bronze strip

• Copper wire

• Steel wire

• Aluminum foil

What is the factor that affects the sensitivity of a moving coil galvanometer related to the number of turns of the coil and the area of the coil?

• Magnetic induction

• Couple per unit twist

• Number of turns of the coil

• Area of the coil

What is the advantage of a moving coil galvanometer related to the produced eddy currents?

• High dependability

• Quick restoration to resting stage

• High sensitivity

• Little effect of stray magnetic fields

What is the drawback of a moving coil galvanometer related to overloading?

• Decreased sensitivity

• Inability to measure direct currents

• Immediate damage

• No effect of stray magnetic fields

What type of current can a moving coil galvanometer measure?

• No current

• Direct current only

• Both direct and alternating current

• Alternating current only

What is the purpose of the pointers in a moving coil galvanometer?

• Control the sensitivity

• Indicate the resistance

• Measure the voltage

• Detect the direction of current flow

What is the formula to calculate the sensitivity of a moving coil galvanometer?

• dθ/di

• nBIl

• nBA/C

• k/nAB

What is the construction material of the coil in a moving coil galvanometer?

• Copper wire

• Steel wire

• Aluminum foil

• Phosphor-bronze strip