Physics MCQs

852 MCQs  (Page 52 of 86)

Two parallel wires carrying currents in the opposite directions____________________?
A. Repel each other
B. Attract each other
C. Have no effect upon each other
D. They cancel out their individual magnetic fields
A magnetic field___________________?
A. Always exerts a force on a charged particle
B. Never exerts a force on a charged particles
C. Exerts a force if the charged particle is moving in the direction of the magnetic field lines
D. Exerts a force if the charged particle is moving perpendicular to the magnetic field lines
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
Which one of the following is not an electromechanical instrument ?
A. Galvanometer
B. Voltmeter
C. Ammeter
D. Ac transformer and dc generator
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