Current Electricity-Series and Parallel Combinations of Resistors [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 1 - 3 of 50
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Question 1
Question MCQ▾
An electric kettle has two heating coils. When one of the coils is switched on, the water begins to boil in 6 minutes. When the other is switched on, the boiling begins in 8 minutes. The time when the boiling begins if both coils are switched on simultaneously is (i) in series (ii) in parallel. (Specific heat of the water is 4.2 joules/gram0 C)
Select the correct answers and mark it according to the following codes:
- 14 min in series
- 3.43 min in parallel
- 3.43 min in series
- 14 min in parallel
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 and 2 | |
b. | 1,2 and 3 | |
c. | 2 and 4 | |
d. | 1 and 3 |
Question 2
Question MCQ▾
Which of the following statements are correct?
- Voltmeter should have high resistance.
- Ammeter should have low resistance.
- Voltmeter is placed in parallel across the conductor in a circuit.
- Ammeter is placed in parallel across the conductor in a circuit.
Select the correct answers and mark it according to the following codes:
Choices
Choice (4) | Response | |
---|---|---|
a. | 1,2 and 3 | |
b. | 2 and 4 | |
c. | 1 and 3 | |
d. | 1 and 2 |
Passage
A battery is connected to a potentiometer obtained at 84 cm along the wire. When a resistance of 5Ω is connected as a shunt with the cell, the balance point is obtained at 70 cm.
Question 3 (1 of 1 Based on Passage)
Question MCQ▾
How can we change a galvanometer with Rg = 20.0 Ω and Ig = 0.00100 A into a voltmeter with a maximum range of 10.0 V?
Choices
Choice (4) | Response | |
---|---|---|
a. | By adding a resistance 9980 Ω in series with the galvanometer | |
b. | By adding a resistance 8890 Ω in series with the galvanometer | |
c. | By adding a resistance 8890 Ω in parallel with the galvanometer | |
d. | By adding a resistance 9980 Ω . in parallel with the galvanometer |