1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A wire of resistance 12 ohms per meter is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points, A and B as shown in the figure is

AIPMT 2009 Physics - Current Electricity Question 68 English
A
$$3\,\Omega $$
B
$$6\pi \,\Omega $$
C
$$6\,\Omega $$
D
$$0.6\pi \,\Omega $$
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The mean free path of electrons in a metal is 4 $$ \times $$ 10$$-$$8 m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units V/m
A
$$5 \times {10^{ - 11}}$$
B
8 $$ \times $$ 10$$-$$11
C
5 $$ \times $$ 107
D
8 $$ \times $$ 107
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A student measures the terminal potential difference (V) of a cell (of emf $$\varepsilon $$ and internal resistance r) as a function of the current (I) flowing through it. The slope, and intercept, of the graph between V and I, then respectively, equal
A
$$-$$ r and $$\varepsilon $$
B
r and $$-$$ $$\varepsilon $$
C
$$-$$ $$\varepsilon $$ and r
D
$$\varepsilon $$ and $$-$$ r
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A galvanometer havings a coil resistance of 60 $$\Omega $$ shows full scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents upto 5.0 amp by
A
putting in series a resistance of 15 $$\Omega $$
B
putting in series a resistance of 240 $$\Omega $$
C
putting in parallel a resistance of 15 $$\Omega $$
D
putting in parallel a resistance of 240 $$\Omega $$
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