1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Two sources of equal $$emf$$ are connected to an external resistance $$R.$$ The internal resistance of the two sources are $${R_1}$$ and $${R_2}\left( {{R_1} > {R_1}} \right).$$ If the potential difference across the source having internal resistance $${R_2}$$ is zero, then
A
$$R = {R_2} - {R_1}$$
B
$$R = {R_2} \times \left( {{R_1} + {R_2}} \right)/\left( {{R_2} - {R_1}} \right)$$
C
$$R = {R_1}{R_2}/\left( {{R_2} - {R_1}} \right)$$
D
$$R = {R_1}{R_2}/\left( {{R_1} - {R_2}} \right)$$
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
In the circuit, the galvanometer $$G$$ shows zero deflection. If the batteries $$A$$ and $$B$$ have negligible internal resistance, the value of the resistor $$R$$ will be - AIEEE 2005 Physics - Current Electricity Question 333 English
A
$$100\Omega $$
B
$$200\Omega $$
C
$$1000\Omega $$
D
$$500\Omega $$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
A
four times
B
doubled
C
halved
D
one fourth
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii are in the ratio of $${4 \over 3}$$ and $${2 \over 3}$$, then the ratio of the current passing through the wires will be
A
$$8/9$$
B
$$1/3$$
C
$$3$$
D
$$2$$
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