1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Two positives ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge on an electron)
A
$${{4\pi {\varepsilon _0}F{d^2}} \over {{e^2}}}$$
B
$$\sqrt {{{4\pi {\varepsilon _0}F{e^2}} \over {{d^2}}}} $$
C
$$\sqrt {{{4\pi {\varepsilon _0}F{d^2}} \over {{e^2}}}} $$
D
$${{4\pi {\varepsilon _0}F{d^2}} \over {{q^2}}}$$
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A series combination of n1 capacitors, each of value C1, is charged by a source of potential difference 4V. When another parallel combination of n2 capacitors, each of value C2, is charged by a source of potential difference V, it has the same (total) energy stored in it. as the first combination has. The value of C2. in terms of C1, is then
A
$${{2{C_1}} \over {{n_1}{n_2}}}$$
B
$$16{{{n_2}} \over {{n_1}}}{C_1}$$
C
$$2{{{n_2}} \over {{n_1}}}{C_1}$$
D
$${{16{C_1}} \over {{n_1}{n_2}}}$$
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Consider the following two statements.
(A)  Kirchoff's junction law follows from the conservation of charge.
(B)  Kirchhoff's loop law follows from the conservation of energy.

Which of the following is correct?
A
Both (A) and (B) are wrong
B
(A) is correct and (B) is wrong
C
(A) is wrong and (B) is correct
D
Both (A) and (B) are correct
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A potentiometer circuit is set up as shown. The potential gradient, across the potentiometer wire, is k volt/cm and the ammeter, present in the circuit, reads 1.0 A when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at length $$l$$1 cm and $$l$$2 cm respectively. The magnitudes, of the resistors R and X, in ohms, are then, equal, respectively, to

AIPMT 2010 Prelims Physics - Current Electricity Question 70 English
A
$$k({l_2} - {l_1})$$ and $$k{l_2}$$
B
$$k{l_1}$$ and $$k({l_2} - {l_1})$$
C
$$k\left( {{l_2} - {l_1}} \right)$$ and $$k{l_1}$$
D
$$k{l_1}$$ and $$k{l_2}$$
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