A parallel plate capacitor is charged by connecting it to a battery through a resistor. If ii is the current in the circuit, then in the gap between the plates:
1. | A displacement current of magnitude equal to i flows in the same direction as i. |
2. | A displacement current of magnitude equal to i flows in the opposite direction to i. |
3. | A displacement current of magnitude greater than i flows but it can be in any direction. |
4. | There is no current. |
1. | the energy density in electric field is equal to energy density in magnetic field. |
2. | they travel with a speed equal to 1√μ0 ε0. |
3. | they originate from charges moving with uniform speed. |
4. | they are transverse in nature. |
List-I | List-II | ||
A. | ∮→E⋅d→A=Qε0 | I. | Ampere-Maxwell's law |
B. | ∮→B⋅d→A=0 | II. | Faraday's law |
C. | ∮→E⋅d→l=−d(ϕ)dt | III. | Gauss's law of electrostatics |
D. | ∮→B⋅d→l=μ0ic+μ0ε0d(ϕE)dt | IV. | Gauss's law of magnetism |
1. | A-III, B-IV, C-II, D-I |
2. | A-IV, B-III, C-II, D-I |
3. | A-III, B-II, C-IV, D-I |
4. | A-IV, B-I, C-III, D-II |
1. | X-rays | 2. | Gamma rays |
3. | Ultraviolet rays | 4. | Microwaves |
List - I (Electromagnetic waves) | List - II (Wavelength) | ||
(a) | AM radio waves | (i) | 10−10 m |
(b) | Microwaves | (ii) | 102 m |
(c) | Infrared radiation | (iii) | 10−2 m |
(d) | X-rays | (iv) | 10−4 m |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (iii) | (ii) | (i) | (iv) |
4. | (iii) | (iv) | (ii) | (i) |