Intense magnetic field may be produced in a coil by using a
A. Normal metal with a large number of turns and sending a large current
B. Type-I superconductor with a large number of turns and sending a large current
C. Type-II superconductor with a large number of turns and sending a large current
D. Type-II superconductor with a large number of turns but limiting the current density below a critical value
Answer: Option B
This Question Belongs to Electronics And Communications Engineering >> Materials And Components
For making a capacitor it is better to have a dielectric having
A. High permittivity
B. Low permittivity
C. Permittivity same as that of air
D. Permittivity which is neither high nor low
As the viscosity of a liquid increases, the relaxation time
A. Remains constant
B. Increases
C. Decreases
D. First decreases then increases
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