Statement I: | Charged particles which undergo acceleration or deceleration radiate their energy away. |
Statement II: | Therefore, charged particles moving in circular paths in a uniform magnetic field should also radiate their energy. |
1. | Statement I is true, Statement II is true and Statement I implies Statement II. |
2. | Statement I is true, Statement II is true and Statement I does not imply Statement II. |
3. | Statement I is true, Statement II is false. |
4. | Statement I is false, Statement II is true. |
The speed of light depends:
1. | on elasticity of the medium only. |
2. | on inertia of the medium only. |
3. | on elasticity as well as inertia. |
4. | neither on elasticity nor on inertia. |
A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle:
1. | does not deflect. |
2. | deflects for a very short time and then comes back to the original position. |
3. | deflects and remains deflected as long as the battery is connected. |
4. | deflects and gradually comes to the original position in a time which is large compared to the time constant. |
Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor:
(a) | increases |
(b) | decreases |
(c) | does not change |
(d) | is zero |
1. | \(300~\text{T}\) | 2. | \(10^{-6}~\text{T}\) |
3. | \(9 \times 10^{10}~\text{T}\) | 4. | \(300\sqrt {2}~\text{T}\) |
A capacitor of capacitance \(C\) is connected across an AC source of voltage \(V\), given by;
\(V=V_0 \sin \omega t\)
The displacement current between the plates of the capacitor would then be given by:
1. \( I_d=\frac{V_0}{\omega C} \sin \omega t \)
2. \( I_d=V_0 \omega C \sin \omega t \)
3. \( I_d=V_0 \omega C \cos \omega t \)
4. \( I_d=\frac{V_0}{\omega C} \cos \omega t\)
1. | cannot be less than 1. |
2. | equals 1, always. |
3. | cannot be greater than 1. |
4. | can be any non-zero value. |