Current Electricity-Potentiometer [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 15 - 19 of 27
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Question 15
Question MCQ▾
The arrangement as shown in figure is called as
Choices
Choice (4) | Response | |
---|---|---|
a. | Potential adder | |
b. | Potential subtracted | |
c. | Potential multiplier | |
d. | Potential divider |
Question 16
Question MCQ▾
In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 Ω, the balancing length becomes 120 cm. The internal resistance of the cell is
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 Ω | |
b. | 4 Ω | |
c. | 1 Ω | |
d. | 0.5 Ω |
Question 17
Question MCQ▾
A Potentiometer wire of length 1 m is connected in series with 490 Ω resistance and 2V battery. If 0.2mV/cm is the potential gradient, then resistance of the potentiometer wire is
Choices
Choice (4) | Response | |
---|---|---|
a. | 5.9 Ω | |
b. | 7.9 Ω | |
c. | 6.9 Ω | |
d. | 4.9 Ω |
Question 18
Appeared in Year: 2021
Question MCQ▾
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?
Choices
Choice (4) | Response | |
---|---|---|
a. | 21.6 cm | |
b. | 60 cm | |
c. | 62 cm | |
d. | 64 cm |
Question 19
Question MCQ▾
The resistivity of a potentiometer wire is and its area of cross-section is . If current is flowing through the wire, the potential gradient will be.
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |