- 1(current)
Q. No.Two heaters \(\mathrm{A}\) and \(\mathrm{B}\) have power rating of \(1~\text{kW}\) and \(2~\text{kW}\), respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:
1. \(2:9\)
2. \(1:2\)
3. \(2:3\)
4. \(1:1\)
1. \(2:9\)
2. \(1:2\)
3. \(2:3\)
4. \(1:1\)
Subtopic: Heating Effects of Current |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThere are two heaters \(A\) and \(B.\) Heater \(A\) takes time \(t_1\) to boil a given quantity of water, while \(B\) takes time \(t_2\) to boil the same quantity of water across same supply voltage. If the two heaters are connected in series, time taken by this combination to boil the same quantity of water will be:
| 1. | \(\large\dfrac{t_1t_2}{t_1+t_2}\) | 2. | \(t_1+t_2\) |
| 3. | \({\large\dfrac12}(t_1+t_2)\) | 4. | \(\large\dfrac{t_1t_2}{2(t_1+t_2)}\) |
Subtopic: Heating Effects of Current |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo resistors of resistance, \(100\) \(\Omega\) and \(200\) \(\Omega\) are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in \(100\) \(\Omega\) resistor to that in \(200\) \(\Omega\) resistor in a given time is:
1. \(4:1\)
2. \(1:2\)
3. \(2:1\)
4. \(1:4\)
1. \(4:1\)
2. \(1:2\)
3. \(2:1\)
4. \(1:4\)
Subtopic: Heating Effects of Current |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following acts as a circuit protection device?
| 1. | Fuse | 2. | Conductor |
| 3. | Inductor | 4. | Switch |
Subtopic: Heating Effects of Current |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySix similar bulbs are connected as shown in the figure with a DC source of emf \(E\) and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section \(\mathrm{A}\) and one from section \(\mathrm{B}\) are glowing, will be:
| 1. | \(2:1\) | 2. | \(4:9\) |
| 3. | \(9:4\) | 4. | \(1:2\) |
Subtopic: Heating Effects of Current |
To view explanation, please take trial in the course below.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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