1
AIEEE 2005
+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
2
AIEEE 2005
+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 -
A
$$100\Omega$$
B
$$200\Omega$$
C
$$1000\Omega$$
D
$$500\Omega$$
3
AIEEE 2005
+4
-1
Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge $$q$$ flows through the voltmeters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are $${Z_1}$$ and $${Z_2}$$ respectively the charge which flows through the silver voltmeter is
A
$${q \over {1 + {{{Z_2}} \over {{Z_1}}}}}$$
B
$${q \over {1 + {{{Z_1}} \over {{Z_2}}}}}$$
C
$$q{{{Z_2}} \over {{Z_1}}}$$
D
$$q{{{Z_1}} \over {{Z_2}}}$$
4
AIEEE 2005
+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
$$R = {R_1}{R_2}/\left( {{R_1} - {R_2}} \right)$$
EXAM MAP
Medical
NEET