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Electromagnetism

A wheat stone bridge is said to be balanced when____________________?

August 30, 2021March 19, 2019 by admin
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 maximum
D. potential difference across galvanometer branch is zero

Categories Electromagnetism, Physics Mcqs

A galvanometer basically is an instrument used to ____________________?

August 30, 2021March 19, 2019 by admin
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

Categories Electromagnetism, Physics Mcqs

Coil of a galvanometer is suspended in a radial magnetic field so that the deflecting torque on the coil is always___________________?

August 30, 2021March 19, 2019 by admin
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 tana
D. BINA

Categories Electromagnetism, 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__________________?

August 30, 2021March 19, 2019 by admin
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

Categories Electromagnetism, Physics Mcqs

In a multi range ammeter as the range increases _____________________?

August 30, 2021March 19, 2019 by admin
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

Categories Electromagnetism, Physics Mcqs

Which one of the following is not an electromechanical instrument ?

August 30, 2021March 19, 2019 by admin
Which one of the following is not an electromechanical instrument ?

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

Categories Electromagnetism, Physics Mcqs

When the coil of the galvanometer is in equilibrium then the deflecting couple is____________________?

August 30, 2021March 19, 2019 by admin
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

Categories Electromagnetism, Physics Mcqs

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

August 30, 2021March 19, 2019 by admin
n instrument which can measure potential without drawing any current is_____________________?

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

Categories Electromagnetism, Physics Mcqs

An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________?

August 30, 2021March 19, 2019 by admin
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

Categories Electromagnetism, Physics Mcqs

The standard vector symbol for flux density is ____________________?

August 30, 2021March 19, 2019 by admin
The standard vector symbol for flux density is ____________________?

A. M
B. L
C. H
D. B

Categories Electromagnetism, Physics Mcqs
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