Strength of magnetic field of solenoid can be increased by adding core made of
A) copper
B) ferrous
C) silver
D) aluminum
Correct Answer:
Verified
Q1: A flat coil and solenoid has
A)different fields
B)same
Q2: Flux density is defined by {{}}
A)FIL
B)F⁄(IL)
C)IL
D)I⁄(FL)
Q4: In Fleming's left hand rule, thumb shows
Q5: If the Earth's magnetic field lines pass
Q6: LED starts to conduct when voltage is
Q7: For non-inverting amplifier the input and output
Q8: A sensing device is also called
A)transistor
B)thermistor
C)sensor
D)transducer
Q9: Op-amp can provide maximum output current of
A)25
Q10: Output resistance of an actual op-amp is
A)45Ω
B)46Ω
C)70Ω
D)75Ω
Q11: Impedance of ideal op-amp is
A)zero
B)1
C)infinite
D)2
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