The magnetic field of a plane electromagnetic wave
is given by,
\(\vec B=3\times10^{-8}cos(1.6\times10^3x+48\times10^{10}t)\hat j~T.\)
The associated electric field will be:
1. \(3 \times 10^{-8} \cos \left(1.6 \times 10^3 x+48 \times 10^{10} t\right) \hat{i}~\text{ V/m}\)
2. \(3 \times 10^{-8} \sin \left(1.6 \times 10^3 \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{i}}~ \mathrm{V} / \mathrm{m}\)
3. \(9 \sin \left(1.6 \times 10^3 \mathrm{x}-48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{k}} ~~\mathrm{V} / \mathrm{m}\)
4. \(9 \cos \left(1.6 \times 10^3 \mathrm{x}+48 \times 10^{10} \mathrm{t}\right) \hat{\mathrm{k}}~~\mathrm{V} / \mathrm{m}\)
Subtopic: Properties of EM Waves |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement about the property of a Zener diode is:
1. zener voltage remains constant at breakdown
2. it is designed to operate under reverse bias
3. depletion region formed is very wide
4. p and n regions of zener diode are heavily doped
1. zener voltage remains constant at breakdown
2. it is designed to operate under reverse bias
3. depletion region formed is very wide
4. p and n regions of zener diode are heavily doped
Subtopic: Applications of PN junction |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA cell of emf 4 V and internal resistance 0.5 \(\Omega\) is connected to a 7.5 \(\Omega\) external resistance. The terminal potential difference of the cell is:
1. 3.75 V
2. 4.25 V
3. 4 V
4. 0.375 V
1. 3.75 V
2. 4.25 V
3. 4 V
4. 0.375 V
Subtopic: EMF & Terminal Voltage |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
Statement-I: In an ac circuit, the current through a capacitor leads the voltage across it.
Statement-II: In ac circuits containing pure capacitance only, the phase difference between the current and the voltage is \(\pi\)
In light of the above statements, choose the most appropriate answer from the options given below:
1. Both statement-I and statement-II are correct
2. Both statement-I and statement-II are incorrect
3. Statement-I is correct but statement-II is incorrect
4. Statement-I is incorrect but statement-II is correct
Statement-I: In an ac circuit, the current through a capacitor leads the voltage across it.
Statement-II: In ac circuits containing pure capacitance only, the phase difference between the current and the voltage is \(\pi\)
In light of the above statements, choose the most appropriate answer from the options given below:
1. Both statement-I and statement-II are correct
2. Both statement-I and statement-II are incorrect
3. Statement-I is correct but statement-II is incorrect
4. Statement-I is incorrect but statement-II is correct
Subtopic: Different Types of AC Circuits |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe equivalent resistance of the infinite network given below is:
1. \(2~\Omega\)
2. \((1+\sqrt2)~\Omega\)
3. \((1+\sqrt3)~\Omega\)
4. \((1+\sqrt5)~\Omega\)
1. \(2~\Omega\)
2. \((1+\sqrt2)~\Omega\)
3. \((1+\sqrt3)~\Omega\)
4. \((1+\sqrt5)~\Omega\)
Subtopic: Combination of Resistors |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA cricket ball is thrown by a player at a speed of 20 m/s in a direction 30° above the horizontal. The maximum height attained by the ball during its motion is: (g = 10 m/s2)
1. 5 m
2. 10 m
3. 20 m
4. 25 m
1. 5 m
2. 10 m
3. 20 m
4. 25 m
Subtopic: Projectile Motion |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA closely packed coil having 1000 turns has an average radius of 62.8 cm. If current carried by the wire of the coil is 1 A, the value of magnetic field produced at the centre of the coil will be:
(permeability of free space = 4\(\pi\) × 10-7 H/m) nearly:
1. 10-1 T
2. 10-2 T
3. 102 T
4. 10-3 T
(permeability of free space = 4\(\pi\) × 10-7 H/m) nearly:
1. 10-1 T
2. 10-2 T
3. 102 T
4. 10-3 T
Subtopic: Magnetic Field due to various cases |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn inductor of inductance 2 mH is connected to a 220 V, 50 Hz ac source. Let the inductive reactance in the circuit is X1. If a 220 V dc source replaces the ac source in the circuit, then the inductive reactance in the circuit is X2. X1 and X2 , respectively, are:
1. 6.28 \(\Omega\), zero
2. 6.28 \(\Omega\), infinity
3. 0.628 \(\Omega\), zero
4. 0.628 \(\Omega\), infinity
1. 6.28 \(\Omega\), zero
2. 6.28 \(\Omega\), infinity
3. 0.628 \(\Omega\), zero
4. 0.628 \(\Omega\), infinity
Subtopic: Different Types of AC Circuits |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring a cloudy day, a primary and a secondary rainbow may be created. Which of the following statement is correct?
| 1. | primary rainbow is due to double internal reflection and is formed above the secondary one. |
| 2. | primary rainbow is due to double internal reflection and is formed below the secondary one. |
| 3. | secondary rainbow is due to double internal reflection and is formed above the primary one. |
| 4. | secondary rainbow is due to a single internal reflection and is formed above the primary one. |
Subtopic: Total Internal Reflection |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV. The stopping potential of the surface is:
1. 2 eV
2. 2 V
3. 1.1 V
4. 6.4 V
1. 2 eV
2. 2 V
3. 1.1 V
4. 6.4 V
Subtopic: Einstein's Photoelectric Equation |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
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