Day 372: JEE Mains Physics

1. A.
   $\overrightarrow{B} = \frac{57}{3 \times 10^{8}}\cos\left\lbrack 7.5 \times 10^{6}t - 5 \times 10^{- 3}(3x + 4y) \right\rbrack(5\widehat{k})$
2. B.
   $\overrightarrow{B} = \frac{57}{3 \times 10^{8}}\cos\left\lbrack 7.5 \times 10^{6}t - 5 \times 10^{- 3}(3x + 4y) \right\rbrack(\widehat{k})$
3. C.
   $\overrightarrow{B} = - \frac{57}{3 \times 10^{8}}\cos\left\lbrack 7.5 \times 10^{6}t - 5 \times 10^{- 3}(3x + 4y) \right\rbrack(5\widehat{k})$
4. D.
   $\overrightarrow{B} = - \frac{57}{3 \times 10^{8}}\cos\left\lbrack 7.5 \times 10^{6}t - 5 \times 10^{- 3}(3x + 4y) \right\rbrack(\widehat{k})$

Tap an option to check your answer.

1. A.
   $\frac{1}{2}$
2. B.
   $\frac{10}{11}$
3. C.
   $\frac{50}{11}$
4. D.
   $\frac{5}{11}$

Tap an option to check your answer.

1. A.
   $1:\sqrt{2}:\sqrt{2}$
2. B.
   $1:1:\sqrt{2}$
3. C.
   $\sqrt{2}:1:1$
4. D.
   $1:\sqrt{2}:1$

Tap an option to check your answer.

1. A.
   $165\text{ }Hz$
2. B.
   $330\text{ }Hz$
3. C.
   $660\text{ }Hz$
4. D.
   $340\text{ }Hz$

Tap an option to check your answer.