Physics Mcqs

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

Submitted By :Ali Uppal

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

Submitted By :Ali Uppal

Which one of the following is not an electromechanical instrument ?

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

Submitted By :Ali Uppal

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

Submitted By :Ali Uppal

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

(A) voltmeter
(B) galvanometer
(C) cathode ray oscilloscope (CRO)
(D) ammeter

Submitted By :Ali Uppal

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/V
(C) E = BV
(D) E = BeV/2

Submitted By :Ali Uppal

The standard vector symbol for flux density is ____________________?

(A) M
(B) L
(C) H
(D) B

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SI unit of flux density is____________________?

(A) NA-1m-1
(B) NAm-1
(C) NmA-1
(D) NmA-2

Submitted By :Ali Uppal

Value of permeability of free space in SI units is___________________?

(A) 4πx10-9 WbA-1m-1
(B) 4πx10-7 WbA-1m-1
(C) 4πx10-10 WbA-1m-1
(D) 4πx10-8 WbA-1m-1

Submitted By :Ali Uppal

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 ellipse
(D) helix

Submitted By :Ali Uppal

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