Physics MCQs:

1.     An inductive coil has a resistance of 100 Ω. When an AC signal of frequency 1000Hz is fed to the coil, the applied voltage leads the current by 45⁰. What is the inductance of the coil?

a)     10mH

b)    12mH

c)     16mH

d)    20mH

2.     The alternating voltage or current is actually measured by

a)     Its rms value

b)    Square root of its mean square value

c)     Peak value

d)    Both A and B are correct

3.     Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other, the current in _____.

a)     Each increases

b)    Each decreases

c)     Each remains the same

d)    One increases whereas other decreases

1.c

2.d

3.b