Which one of the following principles best describes the basic operation of an electromagnet?

A Current is induced in a conductor that is moving through a magnetic field
B Like magnetic poles repel, while unlike poles attract
C Current flowing through a conductor generates a magnetic field
D Like magnetic poles attract, while unlike poles repel
E None of the above

Correct Answer: Current flowing through a conductor generates a magnetic field

Bissoy MCQ
#Computer Science #Electronic Principles

Related Questions

Electromagnet is constructed with which of the following ?
A Steel
B Soft Iron
C Aluminium
D Nickel
An electromagnet is created--------electrical current through a coil of wire.
A by passing
B passes by
C to be passed
D passed
Strength of an electromagnet can be increased by
A increasing the cross-sectional area
B increasing the number of turns
C increasing current supply
D all above methods
The core of an electromagnet is said to be in saturation when:
A the core is permitted to move freely within the coil
B an increase in current through the coil causes no further increase in the mmf
C frequent changes in the direction of current through the coil causes heating effects in the core material
D changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
E None of the above
Core of an electromagnet should have
A low coercivity
B high susceptibility
C both of the above
D none of the above
what is the monthly salary of Rahman ? Statements : 1. Rahman's basic salary is Tk. 100 more Rajan's salary who also serves in Rahman's company. 2. Other allowances drawn by Rajan besides his basic salary are Tk. 2,000 per month which is TK. 50 less than Rahan's salary . 3. Rajan's basic salary is TK. 1550 per month.
A Only II
B Only II and III
C Only I and II
D All I , II and II
which one of the followings was not one of the basic principles of state policy according to 1972 constitution of Bangladesh?
A Democracy
B Nationalism
C Economic Justice
D Secularism
The action of electromagnetic machines can be related to which of the following basic principles ?
A Induction
B Interaction
C Alignment
D All of the above
The students did not adhere ---- the basic principles.
A In
B at
C for
D to
Operation of blast furnace stove is based on the principles of a __________ furnace.
A Regenerative
B Recuperative
C Both A and B
D Neither A nor B

Next steps