1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A thin charged rod is bent into the shape of a small circle of radius R, the charge per unit length of the rod being $$\lambda$$. The circle is rotated about its axis with a time period T and it is found the magnetic field at a distance d away (d >> R) from the centre and on the axis, varies as $$R^m \over d^n$$. The values of m and n respectively are
A
m = 2, n = 2
B
m = 2, n = 3
C
m = 3, n = 2
D
m = 3, n = 3
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
WB JEE 2021 Physics - Magnetism Question 9 English
For two types of magnetic materials A and B, variation of $$1\over\chi$$ ($$\chi$$ : susceptibility) versus temperature T is shown in the figure. Then,
A
A is diamagnetic and B is paramagnetic.
B
A is feromagnetic and B is diamagnetic.
C
A is paramagnetic and B is feromagnetic.
D
A is paramagnetic and B is diamagnetic.
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
WB JEE 2021 Physics - Alternating Current Question 3 English
The rms value of potential difference V shown in the figure is
A
$${{{V_0}} \over 2}$$
B
V0
C
$${{{V_0}} \over {\sqrt 3 }}$$
D
$${{{V_0}} \over {\sqrt 2 }}$$
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
WB JEE 2021 Physics - Current Electricity Question 13 English
The carbon resistor with colour code is shown in the figure. There is no fourth band in the resistor. The value of the resistance is
A
24 M$$\Omega$$ $$\pm$$ 20%
B
14 k$$\Omega$$ $$\pm$$ 5%
C
24 k$$\Omega$$ $$\pm$$ 20%
D
34 k$$\Omega$$ $$\pm$$ 10%
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12