## The effective way to increase the sensitivity of a moving coil…

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# Electromagnetism

## An ammeter measures the total current flowing through a circuit when it is…

An ammeter measures the total current flowing through a circuit when it is connected__________________? A. in series with the circuit B. in parallel with circuit C. in series with any of the parallel resistances in the circuit D.…

## While measuring the unknown resistance the help of slide wire bridge a greatest accuracy can be…

While measuring the unknown resistance the help of slide wire bridge a greatest accuracy can be achieved when__________________? A. a most sensitive galvanometer is used B. a steady voltage cell is usedC. the balance point is close…

## Minimum current required to produce a deflection of 1 mm on a scale at a distance of 1 meter…

Minimum current required to produce a deflection of 1 mm on a scale at a distance of 1 meter is__________________? A. 0.1 A B. 1:00 AMC. current sensitivity D. 1 m A

## The sensitivity of a galvanometer is given by__________________?

The sensitivity of a galvanometer is given by__________________? A. C/BAN B. CAN/B C. BAN/C D. ABC/N

## The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of…

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. 24ΩD. 12Ω

## The magnetic field strength of solenoid is__________________?

The magnetic field strength of solenoid is__________________? A. B = μNI B. B = μN/I C. B = μnID. Both B and C

## Value of permeability of free space in SI units is___________________?

Value of permeability of free space in SI units is___________________? A. 4πx10-9 WbA-1m-1B. 4πx10-7 WbA-1m-1 C. 4πx10-10 WbA-1m-1 D. 4πx10-8 WbA-1m-1

## The charged particle enters the uniform magnetic field in such a way that its initial velocity is…

The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________? A. a circle B. a spiral C. an ellipseD. helix…

## Magnetic flux and flux density are related by___________________?

Magnetic flux and flux density are related by___________________? A. magnetic flux = flux density / areaB. magnetic flux = flux density x area C. flux density = magnetic flux area D. flux density = magnetic flux x area…

## If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field)…

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 tanφD. τ = NIAB…