1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is

A
6.28 $$\times$$ 10$$-$$2 T
B
12.56 $$\times$$ 10$$-$$2 T
C
12.56 $$\times$$ 10$$-$$4 T
D
6.28 $$\times$$ 10$$-$$4 T
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I : Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element (Idl) of a current carrying conductor only.

Statement II : Biot-Savart's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, q.

In light of above statements choose the most appropriate answer from the options given below.

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct and Statement II is incorrect
D
Statement I is incorrect and Statement II is correct
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is

A
2 : 1
B
$$\sqrt2$$ : 1
C
4 : 1
D
1 : $$\sqrt2$$
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

The peak voltage of the ac source is equal to

A
The value of voltage supplied to the circuit
B
The rms value of the ac source
C
$$\sqrt2$$ times the rms value of the ac source
D
1/$$\sqrt2$$ times the rms value of the ac source
EXAM MAP