JEE Main 2021 (Online) 27th July Evening Shift | Magnetics Question 93 | Physics

JEE Main 2021 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

-1

Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which is uniformly distributed across the cross-section. The magnitude of magnetic field B varies with radius r and can be represented as :

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English Option 1

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English Option 2

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English Option 3

JEE Main 2021 (Online) 27th July Evening Shift Physics - Magnetics Question 93 English Option 4

JEE Main 2021 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

-1

Two ions having same mass have charges in the ratio 1 : 2. They are projected normally in a uniform magnetic field with their speeds in the ratio 2 : 3. The ratio of the radii of their circular trajectories is :

1 : 4

4 : 3

3 : 1

2 : 3

JEE Main 2021 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

-1

A linearly polarized electromagnetic wave in vacuum is

$$E = 3.1\cos \left[ {(1.8)z - (5.4 \times {{10}^6})t} \right]\widehat iN/C$$

is incident normally on a perfectly reflecting wall at z = a. Choose the correct option

The wavelength is 5.4 m

The frequency of electromagnetic wave is 54 $$\times$$ 10⁴ Hz.

The transmitted wave will be $$3.1\cos \left[ {(1.8)z - (5.4 \times {{10}^6})t} \right]\widehat iN/C$$

The reflected wave will be $$3.1\cos \left[ {(1.8)z + (5.4 \times {{10}^6})t} \right]\widehat iN/C$$

JEE Main 2021 (Online) 22th July Evening Shift

MCQ (Single Correct Answer)

-1

Choose the correct option

True dip is always equal to apparent dip.

True dip is not mathematically related to apparent dip.

True dip is less than the apparent dip.

True dip is always greater than the apparent dip.